Condition Analysis
AI-powered assessment using site data and 14-day weather history
The crag received 14.6mm of heavy rain on May 3rd and has had only intermittent dry spells since, with trace precipitation on May 5th and today (May 7th). Combined with high average humidity (~80%), moderate temperatures, and a further 1mm forecast tomorrow followed by 13.4mm on May 9th, the rock is unlikely to be reliably dry internally despite the SE/S aspect.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley is Millstone Grit rather than the Fell Sandstone found at most Northumberland crags — it is coarser-grained with different porosity, but still porous and must not be climbed wet.
- Condition reports from April note that south-facing and wind-exposed boulders dry significantly faster than north-facing or shady ones — scattered boulders around the crag will vary widely in condition.
- The open moorland setting at 215m means overnight temperatures have been dipping below freezing (−2.4°C on May 1st, −0.3°C on May 6th), raising freeze-thaw concerns on any rock still holding internal moisture from the May 3rd deluge.
- The prominent main buttress with its SE/S aspect will be in better shape than outlying shaded boulders, but even south-facing rock needs sustained dry weather after 14.6mm of rain.
Warnings
2
- Overnight frost combined with internally wet rock creates active freeze-thaw damage risk — climbing on weakened holds risks both injury and permanent route damage.
- The surface may appear dry on the south-facing buttress this afternoon but internal moisture from 14.6mm on May 3rd is very likely still present in this porous gritstone.
Reasoning
The 14.6mm event on May 3rd would have thoroughly wetted the rock, and only 3 full dry days have passed since (May 4th, 6th, and partially today), with trace rain on May 5th interrupting the drying window.
The SE/S aspect and partial wind exposure are helpful, but average temperatures of only ~7.6°C and humidity around 80% over the past week mean drying has been slow — far from the 48–72+ hours of good drying conditions needed after heavy rain.
With sub-zero overnight temperatures recorded as recently as May 6th (−0.3°C) and potentially saturated rock from the May 3rd event, there is a real freeze-thaw risk contributing to grain loosening and hold breakage.
Early May in Northumberland at 215m is still transitional — frost is common overnight, and the prolonged wet spring (37.3mm in the past 28 days) means background moisture levels in the rock remain elevated.
Contributing Factors
8
14.6mm of rain on May 3rd at 97% humidity would have deeply saturated the porous Millstone Grit.
Only ~3 days of intermittent dry weather since the heavy rain, with trace precipitation on May 5th and today breaking the drying window.
Average humidity of 80% over the past week significantly slows evaporative drying from porous rock.
The south-facing aspect captures good spring solar radiation, helping surface drying on the main buttress.
Average temps of only 7.6°C over the past week slow the drying process considerably compared to summer conditions.
Overnight lows have reached −2.4°C (May 1st) and −0.3°C (May 6th), creating freeze-thaw cycling risk in rock that may still hold internal moisture above the critical 60% saturation threshold.
13.4mm forecast on May 9th and 8.8mm on May 11th will re-saturate any progress made in drying.
Partial wind exposure on the open moorland aids surface drying, though winds have been from variable and sometimes unfavourable directions (NE).
Recommendations
3
- Do not climb today — the rock is likely still holding internal moisture from the May 3rd heavy rain event despite some surface drying.
- Avoid visiting through at least May 12th given forecast rain on May 9th (13.4mm) and May 11th (8.8mm), which will reset drying entirely.
- If visiting after the forecast rain clears, prioritise the most exposed south-facing faces of the main buttress and perform a touch-test at the base — if the ground or lower rock feels cool and damp, walk away.
Previous Analyses
Marginal — Assess Conditions
55%
2 days ago
The last significant rain was 14.6mm on May 3rd, followed by only trace precipitation (0.4mm on May 5th) and one full dry day today with low humidity and moderate wind. The SE/S aspect and today's favourable drying conditions are promising, but only ~2.5 days of drying after heavy rain on porous Millstone Grit is marginal — south-facing exposed boulders may be climbable but a careful on-site assessment is essential.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's Millstone Grit is coarser than Fell Sandstone with different porosity — it can behave slightly differently in drying, but remains highly susceptible to strength loss when damp and must be treated with equal caution.
- The crag has a mix of a prominent main buttress and scattered boulders — south-facing exposed boulders dry fastest while any north-facing or shady problems (e.g. Gloom area) will retain moisture much longer.
- Open moorland setting at 215m means overnight frost is common (min temps near or below 0°C recently), which can slow overnight drying but the good solar exposure during the day compensates.
- A major wet spell is forecast from May 8–10 with over 50mm of rain, which will reset drying completely and likely render the crag unclimbable for several days afterwards.
Warnings
2
- Do not climb on any rock that feels cool and damp to the touch — Millstone Grit can lose 30%+ of its compressive strength while appearing surface-dry.
- A major rainfall event (50mm+) is forecast May 8–10; the crag will be unsafe for several days after this passes.
Reasoning
The 14.6mm event on May 3rd was heavy enough to saturate the rock, and with only ~2.5 days of drying since (including trace rain on May 5th), internal moisture likely persists in thicker sections and shaded faces despite the favourable conditions today.
Today's low humidity (44–55% through the afternoon), moderate easterly wind (~14 km/h), and the SE/S aspect catching sun are all helpful, but the cumulative drying window since May 3rd's heavy rain is only about 60 hours — borderline for the 48–72+ hour guideline after >10mm of rain.
Millstone Grit at partial saturation retains significant compressive strength loss; holds on problems that haven't fully dried internally could still be weakened even if the surface appears dry.
Spring conditions in early May at 215m altitude mean cool overnight temperatures (near 0°C) slowing drying, though lengthening days and increasing solar angle are beginning to favour faster drying on the south-facing aspect.
Contributing Factors
8
14.6mm of rain on May 3rd at 97% humidity would have deeply saturated the porous Millstone Grit, requiring 48–72+ hours of good drying conditions.
0.4mm on May 5th is trivial but interrupted the drying clock slightly and indicates continued unsettled conditions.
Humidity dropping to 44–49% this afternoon is the lowest in weeks and strongly favours surface evaporation.
The south-facing aspect captures good spring sunshine, accelerating drying on exposed faces particularly through the midday–afternoon window.
Easterly wind at ~14 km/h provides decent airflow across the partially exposed crag, aiding evaporation from the rock surface.
Overnight lows near 0°C slow drying considerably during the night hours and may cause minor frost action on any residually damp rock.
37mm over the last 28 days with frequent small rainfall events means the rock has had limited opportunity to dry out fully at any point this spring.
Over 50mm forecast from May 8–10 does not affect today's conditions but will completely reset drying and close the venue for days afterwards.
Recommendations
3
- If visiting today, focus only on south-facing, exposed, and overhanging boulders — perform a thorough touch-test before committing to any problem, and abandon if any dampness is detected.
- Avoid north-facing or shaded problems entirely (e.g. the Gloom area) as these will not have dried sufficiently.
- Tomorrow (May 7th) offers the best window this week — a second full dry day with improving temperatures and southerly wind should bring exposed problems into better condition, but rain returns May 8th.
Do Not Climb
60%
3 days ago
Heavy rain on May 3rd (14.6mm) was followed by only one full dry day before today's light showers, which is insufficient drying time for Millstone Grit. The rock is very likely still holding internal moisture despite any surface drying, and today's fresh precipitation compounds the problem.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's SE/S aspect will have received some solar benefit on the dry May 4th afternoon (humidity dropped to 57%, some sun breaks), but a single day is far too short to dry 14.6mm of rain from porous grit.
- The open moorland setting provides decent wind exposure, but the NE wind direction today is blowing onto the SE-facing rock, potentially driving moisture into the face rather than aiding evaporation.
- Scattered boulders at various orientations mean some north-facing or shaded problems will be significantly wetter than the main south-facing buttress — condition reports consistently confirm this pattern at Rothley.
- The spring period has been persistently damp with 37.2mm over 28 days and average humidity of 81% over the last week, meaning background moisture levels in the rock are elevated beyond what a single rain event would suggest.
Warnings
2
- Climbing on wet Millstone Grit causes permanent hold breakage and route degradation — do not climb if any dampness is detected.
- Overnight temperatures near 0°C combined with saturated rock create active freeze-thaw conditions that weaken the rock structure.
Reasoning
The 14.6mm rain on May 3rd will have substantially saturated the Millstone Grit, and only one dry day (May 4th) has elapsed — far short of the 48–72+ hours needed for heavy rain on porous rock.
May 4th provided reasonable drying conditions in the afternoon (humidity ~57–64%, moderate westerly wind, temps to 13.9°C), but today brought 0.6mm of fresh precipitation late morning, resetting surface drying and keeping the rock damp.
With likely internal saturation above 1% and recent heavy wetting, grain loosening and hold breakage risk is elevated — climbing now risks permanent damage to this Millstone Grit venue.
Spring conditions in Northumberland at 215m remain cool (average 8.1°C over the past week) with overnight temperatures near or below freezing, which significantly slows drying and introduces mild freeze-thaw concern for saturated rock.
Contributing Factors
8
14.6mm fell on May 3rd, requiring a minimum 48–72 hours of dry weather for adequate drying of porous Millstone Grit.
Only one full dry day (May 4th) has passed since the heavy rain, well short of the two-day minimum for porous rock.
0.6mm forecast today (late morning showers) re-wets the surface and resets any progress toward drying.
37.2mm over 28 days and average 81% humidity over the past week mean cumulative moisture loading is high.
The south-facing aspect catches good spring sun when available, which did aid some surface drying on May 4th afternoon.
Average temperature of 8.1°C over the past week with sub-zero overnight lows significantly slows evaporation rates.
Partial wind exposure on open moorland helps move moist air from the rock surface, though today's NE wind is less helpful for SE-facing rock.
Overnight lows near or below 0°C on saturated rock create freeze-thaw stress, with the critical 60% saturation threshold likely exceeded after 14.6mm rain.
Recommendations
3
- Wait at least until May 7th or 8th before visiting — the rock needs a minimum of 48–72 hours of dry weather after the May 3rd heavy rain and today's showers.
- If visiting later this week, test conditions by checking the ground at the base of the crag: if it is still moist, the rock is too wet to climb.
- Prioritise the most exposed, south-facing boulders on the main buttress first, as these will dry fastest; avoid any north-facing or shaded problems for several additional days.
Do Not Climb
55%
4 days ago
Heavy rain (14.6mm) fell yesterday (May 3rd) across the entire day, saturating the rock after an already damp spring period. Despite improving conditions this afternoon with dropping humidity and some sun, only ~24 hours will have elapsed since substantial rainfall — insufficient drying time for porous Millstone Grit.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's SE/S aspect will receive good solar radiation this afternoon (humidity dropping to ~51%), which helps surface drying, but internal moisture from yesterday's prolonged soaking will persist.
- The scattered boulder field means individual blocks dry at different rates — south-facing exposed boulders dry fastest while shady or north-facing problems (e.g. Gloom area) will remain damp far longer, as confirmed by the April condition report.
- Open moorland setting at 215m means the ground around the crag base will likely still be saturated, which is a reliable field indicator that the rock retains internal moisture.
- The preceding weeks saw repeated light rainfall events (9.3mm on Apr 15, 3.4mm on Apr 17, plus numerous sub-2mm days), meaning the rock never fully dried out before yesterday's heavy soaking.
Warnings
2
- 14.6mm of rain fell yesterday — porous Millstone Grit requires 48–72+ hours of good drying conditions after heavy rain; climbing today risks permanent hold damage.
- The surface may appear dry this afternoon while the interior remains saturated — this is the most dangerous scenario for hold breakage on gritstone.
Reasoning
14.6mm of rain fell across many hours on May 3rd with near-100% humidity throughout, deeply saturating the porous Millstone Grit; only ~18 hours of drying have elapsed since the last significant precipitation, far short of the 48–72+ hours needed after heavy rain.
Today's afternoon forecast shows improving conditions (humidity dropping to 51%, temps reaching 14°C, moderate westerly wind at ~15 km/h, and some sun breaks), but the overnight period was very humid (95–97%) with near-calm winds, meaning meaningful drying only begins mid-morning — totalling perhaps 6–8 hours of decent drying by late afternoon.
With the rock likely still above 1% saturation internally, significant compressive strength loss is expected; climbing risks hold breakage and permanent grain loosening on this coarse Millstone Grit.
Spring conditions in Northumberland at 215m remain marginal — average temps over the past week were only 8.3°C and humidity averaged 82%, meaning the rock has had very limited cumulative drying capacity throughout the recent wet spell.
Contributing Factors
7
14.6mm fell across May 3rd with near-100% humidity for the entire day, thoroughly saturating the porous Millstone Grit.
Only ~24 hours since heavy rain, well short of the 48–72+ hour minimum required for porous rock after >10mm precipitation.
36.6mm over the past 28 days with frequent light rain events means the rock never fully dried before yesterday's soaking.
Humidity dropping to 51% with temperatures reaching 14°C and moderate westerly wind will promote surface drying through the afternoon.
The south-facing aspect catches good spring sunshine during afternoon breaks in cloud cover, accelerating surface evaporation.
Humidity remained at 95–97% with near-calm winds overnight, meaning no meaningful drying occurred between the rain ending and mid-morning today.
3mm forecast for May 5th will re-wet any surface drying achieved today, resetting the drying clock.
Recommendations
3
- Do not climb today — the rock will appear to be drying on the surface this afternoon but will retain dangerous internal moisture from yesterday's 14.6mm soaking.
- With further rain forecast for May 5th, 7th, and 8th, the next realistic climbing window is unlikely before May 9th or 10th at the earliest — check conditions then.
- If visiting in the coming days, use the moorland ground test: if the ground at the base of the boulders is still damp, the rock is certainly still wet internally.
Do Not Climb
95%
4 days ago
Today saw 14.6mm of heavy rain with 96% humidity — the rock will be thoroughly saturated. Rothley Crag's Millstone Grit is porous and will need at least 48–72 hours of dry weather to recover, which the forecast does not provide.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's SE/S aspect normally aids drying, but today's NE wind direction means the face is sheltered from any drying breeze, prolonging saturation.
- The open moorland setting means the ground around the crag base will hold moisture — a reliable field indicator that internal rock moisture remains high.
- Scattered boulders at ground level will absorb splash-back and ground moisture in addition to direct rain, making them slower to dry than the main buttress's upper sections.
- Historical condition reports confirm that even after strong drying days, north-facing and shady boulders at Rothley remain damp — expect significant variation across the venue even as conditions improve.
Warnings
2
- 14.6mm of heavy rain today has fully saturated the porous Millstone Grit — climbing risks permanent hold breakage and route damage.
- The forecast shows further rain on May 5th (5.3mm) and May 6th (1.0mm), preventing any sustained drying window in the near term.
Reasoning
14.6mm of rain today at 96% humidity will have fully saturated the Millstone Grit to well beyond the critical 1% threshold where significant strength loss begins.
With zero consecutive dry days and the preceding week already delivering intermittent light rain (keeping background moisture elevated), meaningful drying has not begun and the SE/S aspect receives no benefit from today's NE wind.
At full saturation the rock faces 10–50% compressive strength reduction, with high risk of hold breakage and grain loosening on the coarse Millstone Grit.
Spring conditions in late April/early May at 215m altitude mean moderate temperatures but persistent humidity (83% average over the last week), slowing drying considerably.
Contributing Factors
6
14.6mm of rain today is the heaviest single-day total in the past month, requiring a minimum 48–72 hours of dry weather to recover.
96% humidity today effectively prevents any evaporation, and the weekly average of 83% has kept background moisture levels elevated.
15.2mm in the last 7 days and 38.7mm in the last 28 days mean the rock has had little opportunity to fully dry out between rain events.
Today's NE wind blows onto the back of the SE/S-facing crag, providing minimal drying benefit to the climbing surfaces.
Temperatures around 9°C are sufficient to support some drying but far from ideal for rapid evaporation of a fully saturated crag.
The coarse-grained Millstone Grit absorbs water readily via capillary suction and loses up to 80% of compressive strength within hours of wetting.
Recommendations
3
- Do not climb today — the rock is fully saturated from 14.6mm of rain and conditions are clearly unsafe.
- Monitor the forecast carefully; the earliest realistic window may be May 8th if the forecast holds, but further rain on May 5th and 6th will reset the drying clock.
- When conditions do improve, check the ground at the crag base — if moorland soil is still damp, the rock interior will be too.
Do Not Climb
95%
4 days ago
Today saw 16.9mm of heavy rain with 96% humidity, thoroughly saturating the Millstone Grit. The rock will be soaking wet and completely unsuitable for climbing; significant drying time is needed before conditions become acceptable.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's Millstone Grit is coarser than Fell Sandstone but still highly porous — after 16.9mm of rain, the rock will be saturated well beyond the surface and needs 48–72+ hours of good drying conditions.
- The SE/S aspect is advantageous for drying, but today's NE wind direction means the face is relatively sheltered from the breeze, reducing wind-assisted drying.
- Scattered boulders on open moorland dry at different rates — south-facing exposed boulders will dry first, while north-facing or shaded boulders (as noted in condition reports) can remain damp for days longer.
- The base of the prominent buttress and lower sections of boulders will retain moisture longest as water drains downward through the porous grit; check ground moisture at the crag base as a field indicator.
Warnings
2
- Climbing on saturated Millstone Grit risks permanent hold breakage and route damage — the rock loses up to 50% of its compressive strength when wet.
- The surface may appear dry before the interior has dried sufficiently — always check ground moisture at the base of the crag as a proxy for internal rock moisture.
Reasoning
Today's 16.9mm of rain at 96% humidity has fully saturated the Millstone Grit, with zero consecutive dry days and the rock absorbing water rapidly through capillary action.
With rain falling today and NE winds providing limited drying on the SE/S-facing rock, essentially no meaningful drying has occurred; at least 48–72 hours of dry weather with favourable winds are needed after this volume of rain.
The rock is currently at or near full saturation, meaning compressive strength is reduced by 10–50% — climbing now risks hold breakage, grain loosening, and permanent route damage.
Spring conditions in late April/early May at 215m altitude mean moderate temperatures but persistently high humidity (83% average over the last week), which slows drying considerably.
Contributing Factors
6
16.9mm of precipitation today is classified as heavy rain, thoroughly saturating the porous Millstone Grit throughout.
96% humidity today and an 83% average over the past week severely limits evaporative drying.
41mm over 28 days with frequent small rain events means the rock has had little opportunity to fully dry out before today's heavy soaking.
The south-facing aspect will receive good solar radiation during drying days, which will help once the rain stops.
Today's NE wind is blowing onto the back of the SE/S-facing rock, providing minimal wind-assisted drying on the climbing faces.
Temperatures around 9°C are neither cold enough to halt drying nor warm enough to drive rapid evaporation.
Recommendations
3
- Do not climb today — the rock is saturated after 16.9mm of heavy rain and needs at least 48–72 hours of dry weather to recover.
- Monitor conditions from May 6th onwards when a dry spell with lower humidity (63%) is forecast, but verify by checking ground moisture at the crag base before climbing.
- Prioritise south-facing, wind-exposed boulders first when returning — north-facing and shaded problems will take significantly longer to dry, as noted in local condition reports.
Do Not Climb
95%
4 days ago
Rothley Crag received 16.5mm of heavy rain today with 97% humidity and NE winds, thoroughly saturating the Millstone Grit. The rock will be soaked through and conditions are clearly unsuitable for climbing.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's open moorland setting means the full 16.5mm today will have hit the rock directly with no tree canopy shelter, and the NE wind direction means the SE/S-facing main buttress was relatively sheltered from wind-driven drying.
- Historical condition reports confirm that even after strong drying periods, north-facing and shady boulders at Rothley hold moisture much longer — the scattered boulder field means many problems have varied aspects and micro-climates.
- The preceding weeks show a pattern of frequent light rain events (0.1–3.4mm every few days) that have kept background moisture levels elevated, meaning the rock was unlikely fully dry even before today's heavy soaking.
- At 215m altitude with spring overnight temperatures still dropping near or below freezing (min −2.4°C on May 1st), drying is slower than lowland crags and any residual moisture creates freeze-thaw risk during cold nights.
Warnings
2
- 16.5mm of rain today on already chronically damp Millstone Grit means the rock is deeply saturated — climbing now risks irreversible hold breakage and permanent route damage.
- Overnight temperatures near freezing combined with saturated rock create active freeze-thaw conditions that further weaken the stone.
Reasoning
The 16.5mm of rain today at 97% humidity will have fully saturated the Millstone Grit — wetting fronts advance rapidly through this porous rock and the volume far exceeds what is needed for deep penetration.
With today's NE wind direction the SE/S-facing aspects were somewhat sheltered, and at 97% humidity there was essentially no evaporative drying occurring today; meaningful drying cannot begin until tomorrow when humidity drops to 78%.
At full saturation the Millstone Grit will have lost 30–50% of its compressive strength, making hold breakage a serious risk, and the cumulative wet weeks preceding today mean the rock has had little opportunity to fully dry out internally.
Spring conditions in late April/early May have been characterised by persistent light rain events keeping the rock chronically damp, and overnight temperatures still occasionally dropping below freezing create additional freeze-thaw stress on saturated rock.
Contributing Factors
6
16.5mm of rain today is a significant soaking event that will have fully saturated the porous Millstone Grit to depth.
At 97% humidity, virtually no evaporative drying can occur from the rock surface today.
Frequent light rain events over the past 4 weeks (40.6mm total) mean the rock likely never fully dried internally before today's heavy rain.
Today's NE wind direction means the SE/S-facing main buttress is on the lee side, reducing any wind-assisted surface drying.
At 215m with recent overnight frosts still occurring, evaporative drying is slower than at lower-elevation sites.
The favourable SE/S aspect will aid drying once the rain stops and humidity drops tomorrow, but this benefit is entirely prospective.
Recommendations
3
- Do not climb today — the rock is thoroughly saturated and any climbing risks permanent hold damage to this Millstone Grit venue.
- Wait a minimum of 48–72 hours after today's rain before considering a visit, and check that the ground at the crag base is sandy-dry before touching the rock.
- When conditions do improve, prioritise the sun-exposed south-facing main buttress and wind-exposed arêtes first, as these will dry quickest — avoid shady and north-facing scattered boulders for longer.
Marginal — Assess Conditions
55%
5 days ago
The rock has had a mostly dry spell over the last few days with only trace precipitation, but persistent high humidity (~81% average) and a wet April (28mm over 28 days) mean internal moisture may linger. South-facing boulders exposed to wind are likely dry, but shaded or north-facing faces could still hold dampness — on-site assessment is essential.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley is Millstone Grit rather than Fell Sandstone, giving coarser porosity that can hold moisture differently — condition reports confirm north-facing and shaded boulders dry significantly slower than sun-facing ones.
- The SE/S aspect means the main buttress catches good afternoon sun, and recent condition reports specifically note that south-facing and wind-exposed boulders dry well ahead of shaded ones.
- Open moorland at 215m means overnight frosts are still possible (min -2.4°C on May 1st) — any residual internal moisture could be subject to freeze-thaw stress, particularly on boulders that cool rapidly overnight.
- Scattered boulder layout means individual problems vary hugely in drying speed; climbers should test each boulder individually rather than assuming conditions are uniform across the venue.
Warnings
2
- Heavy rain (9mm) is forecast for May 3rd followed by further rain on May 5th and 6th — conditions will deteriorate significantly from tomorrow.
- Overnight frosts are still occurring at this altitude; any internally damp rock is at risk of freeze-thaw damage even if the surface appears dry.
Reasoning
Only trace precipitation in the last 4 days (0.2mm on May 1st, 0.1mm today), but 28mm over the past month and persistent humidity around 80% suggest internal moisture has not fully dissipated, particularly in shaded or sheltered boulders.
The SE/S aspect and moderate wind exposure have provided reasonable drying conditions since the last meaningful rain (1.0mm on April 21st), giving south-facing surfaces roughly 10+ days of mostly dry weather, though the trace rain events and high humidity have slowed full deep drying.
Millstone Grit is porous and susceptible to strength loss when wet; overnight frost events down to -2.4°C with possible residual internal moisture create a mild freeze-thaw risk, though conditions are improving into May.
Early May in Northumberland is transitional — improving temperatures and longer days aid drying, but overnight frosts and Atlantic moisture keep humidity elevated and limit sustained drying windows.
Contributing Factors
7
Only trace amounts of rain (0.2mm and 0.1mm) in the last two days, with the last significant rain being 1.0mm on April 21st — over 10 days ago for sun-exposed faces.
Average humidity over the last 7 days is 81%, which significantly slows evaporative drying and can maintain internal moisture even during dry spells.
The south-facing aspect receives good solar radiation in spring, accelerating surface and near-surface drying on the main buttress and exposed boulders.
28mm over the past 28 days represents a persistently damp month with frequent small rain events preventing full drying cycles from completing.
Partial wind exposure on open moorland provides some airflow to aid drying, though wind speeds have been moderate (15–25 km/h) recently.
Minimum temperatures dropping below 0°C as recently as May 1st (-2.4°C) create freeze-thaw risk for any internally damp rock.
9.0mm forecast for May 3rd with 94% humidity will re-saturate exposed rock and reset drying clocks, making today a narrow window.
Recommendations
3
- Focus on south-facing, wind-exposed boulders and avoid any north-facing or shaded problems — the condition reports consistently confirm these dry at very different rates.
- Perform a touch test on each boulder before climbing: if the rock feels cold or clammy, or the ground at the base is damp, do not climb that problem.
- Plan to climb today if conditions check out on arrival, as 9mm of rain is forecast for tomorrow which will reset drying conditions for several days.
Marginal — Assess Conditions
70%
6 days ago
Three consecutive dry days culminating in a warm 19.9°C day with lower humidity (71%) and a favourable SE/S aspect suggest south-facing boulders are likely dry, but persistent high average humidity (81% over the last week) and scattered light rain events throughout April warrant on-site verification. The rock should be assessed visually before committing, particularly any shaded or north-facing problems.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's scattered boulder layout means individual blocks dry at very different rates — south-facing exposed boulders (e.g. Arête Land area) dry significantly faster than shady north-facing ones (e.g. Gloom area), as confirmed by recent condition reports.
- The Millstone Grit here is coarser-grained than Fell Sandstone with different porosity; while still porous and ethically off-limits when wet, the coarser texture may allow slightly faster surface drainage than finer-grained sandstone.
- Open moorland setting at 215m provides reasonable wind exposure but also means overnight temperatures have been dropping below freezing (−0.2°C last night), which can slow drying and create localised frost on shaded surfaces.
- April's cumulative 31.9mm of rain across 28 days, delivered in frequent small doses, means the rock has rarely had extended dry windows — internal moisture levels may be higher than the recent 3-day dry spell alone would suggest.
Warnings
2
- Rain is forecast from tomorrow (0.4mm on May 2, 2.7mm on May 3), so today may be the best window before conditions deteriorate again.
- Do not assume all boulders are dry — Rothley's scattered layout means conditions vary dramatically between individual blocks; test each problem before committing.
Reasoning
The last significant rain was 0.3mm on April 28, with three fully dry days since and today's warm conditions (19.9°C, 71% humidity) providing good evaporative potential, but the frequent small rain events throughout April (31.9mm total) mean internal moisture levels may still be elevated despite surface drying.
Three dry days with today's exceptional warmth and the SE/S aspect receiving strong May sunshine should have dried south-facing surfaces well, though moderate winds (17 km/h) and the relatively high average humidity of 81% over the past week have limited deep drying.
The overnight frost (−0.2°C) following a period of intermittent wetting raises a minor freeze-thaw concern, though internal saturation is unlikely to be at critical levels given the recent dry spell; hold breakage risk is low-to-moderate for well-dried surfaces.
Early May in Northumberland brings lengthening days and increasing solar angle which strongly benefits this SE/S-facing crag, though spring conditions remain changeable and the 215m altitude means overnight frosts are still possible.
Contributing Factors
7
No meaningful precipitation since April 28 (0.3mm), giving approximately 72+ hours of drying time heading into today.
Today's 19.9°C maximum with 71% humidity and SW wind is the best drying day in weeks, significantly accelerating surface and near-surface evaporation on the SE/S-facing rock.
South and southeast-facing boulders receive strong May sunshine for most of the day, which is the primary driver of drying at this crag.
Average humidity of 81% over the past 7 days has limited evaporative drying potential, meaning deep rock moisture may persist despite surface drying.
31.9mm spread across numerous small events in the last 28 days means the rock has been repeatedly re-wetted, preventing thorough drying and maintaining elevated internal moisture.
Minimum temperature of −0.2°C last night at 215m altitude could have caused minor freeze-thaw stress on any internally damp rock.
Partial wind exposure on the open moorland has provided helpful but not dominant airflow to assist surface drying over the dry spell.
Recommendations
3
- Focus on the south-facing, wind-exposed boulders which will have dried best — check rock is warm and sandy-dry to the touch before climbing, and verify the ground at the base is dry.
- Avoid north-facing and shaded problems (e.g. the Gloom area) which historically hold moisture much longer and are unlikely to be reliably dry after only three dry days.
- Consider climbing in the afternoon when solar heating has been at its peak, maximising surface drying on the SE/S faces.
Marginal — Assess Conditions
62%
9 days ago
The last significant rain was 0.3mm on April 28, with only trace amounts in the preceding week, but persistent high humidity (82% average) and cool temperatures have limited drying effectiveness. South-facing boulders exposed to wind are likely dry after several mostly-dry days, but shaded or north-facing features may still hold moisture given the prolonged damp spring pattern.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's scattered boulder layout means individual blocks dry at very different rates — exposed, south-facing boulders like those near Arête Land dry far faster than shaded ones like Gloom, so conditions can vary dramatically within metres.
- The Millstone Grit here is coarser than Fell Sandstone with different porosity; while it can shed surface moisture relatively quickly in good conditions, internal drying still requires sustained low humidity which has been lacking recently.
- The open moorland setting at 215m means overnight temperatures have been dropping near or below freezing (min -2.7°C on April 24), and with 33.8mm of rain over 28 days the rock has been repeatedly re-wetted before fully drying.
- NE and E winds over the past week blow somewhat across the SE/S-facing aspects rather than directly onto them, providing moderate but not optimal drying assistance.
Warnings
2
- Do not climb on any boulder that feels cold, clammy, or shows any visible dampness — Millstone Grit loses significant strength even at very low moisture levels.
- High overnight humidity (95%+) may cause condensation on rock surfaces in the early morning; wait until afternoon for the best conditions.
Reasoning
The rock received only trace precipitation (0.3mm) yesterday and 0.7mm on April 20 and 1.0mm on April 21, but the cumulative 33.8mm over 28 days combined with persistently high humidity (82% average last 7 days) means internal moisture levels in thicker blocks and shaded faces are likely still elevated.
The SE/S aspect has benefited from some solar input during the mostly dry spell since April 22 (7 days with only 0.4mm total), but moderate winds (11-17 km/h) from NE/E directions and humidity rarely dropping below 78% have limited evaporative drying — surface-dry conditions are plausible on sun-exposed faces, but deep drying is uncertain.
With April overnight lows reaching -2.7°C on April 24 and -0.6°C on April 23 following weeks of intermittent wetting, some freeze-thaw cycling has occurred this month, though the risk is diminishing as spring progresses.
Mid-spring conditions in Northumberland at 215m remain cool with limited solar intensity; while days are lengthening and conditions improving, the prolonged wet April means the rock has had little chance to fully dry out between repeated wetting events.
Contributing Factors
7
Only 0.4mm in the last 7 days with the last meaningful rain (1.0mm) falling on April 21, giving approximately 8 days of near-dry weather for south-facing surfaces.
33.8mm over 28 days with frequent small wetting events means the rock has been repeatedly re-saturated, preventing deep internal drying.
Average humidity of 82% over the last week with overnight values reaching 95-97% significantly impedes evaporative drying and may cause overnight re-condensation on cold rock surfaces.
The south-facing aspect catches good spring sunshine when available, and sun-exposed boulders will have benefited most from the recent dry spell.
Average temperature of 7.0°C over the last week with overnight lows near or below freezing reduces drying rate and introduces marginal freeze-thaw risk on any internally damp rock.
Winds have been moderate (11-18 km/h) but predominantly from NE/E, which blows across rather than directly onto the SE/S faces, providing some but not optimal drying assistance.
The 0.3mm on April 28 in very humid conditions (89% humidity) was minor but combined with near-saturated overnight air may have added surface moisture to the rock.
Recommendations
3
- Focus on the most exposed, south-facing boulders that catch direct sun — these are most likely to be dry; avoid shaded, north-facing problems like Gloom entirely.
- Perform a thorough touch test on multiple holds and check that the ground at the base of boulders is completely dry before committing to any problem.
- If any dampness is detected on hold surfaces or the rock feels cold and clammy, wait — the improving forecast for May 1 (18°C, 74% humidity) should bring significantly better conditions.
Climbing Outlook