Climbing Forecast › North Wales — Ogwen › Idwal Slabs

NORTH WALES — OGWEN · RHYOLITE

Idwal Slabs weather & climbing conditions

Poor — wet, too windy or closed

Right now

Temp7°C
Wind29 km/h
Gusts43 km/h
Humidity99.32%
Rain 48h1mm
Last rain1h ago

Assessment

6.1mm rain forecast
Windy — 29 km/h, gusts 56 km/h
Humidity 93% — potential fog
High humidity (99.32%) — rhyolite friction compromised, particularly for bouldering
Windy — 29 km/h, gusts 43 km/h. Take care on exposed routes

Drying Time

14% dry · 6-13h to dry

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Wednesday 21 October
Poor
Temp7°C
Rain6mm
Wind29 km/h
Gusts56 km/h
Humidity93%
6.1mm rain forecastWindy — 29 km/h, gusts 56 km/hHumidity 93% — potential fog
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
10:00 7° 1mm 29 43 99.32%
13:00 6° 3mm 30 56 91.18%
16:00 6° 1mm 29 55 87.43%
19:00 6° 0.3mm 20 44 75.99%
Thu Thursday 22 October
Poor
Temp7°C
Rain4mm
Wind14 km/h
Gusts30 km/h
Humidity78%
4.1mm rain forecast
  • Wet rhyolite is slippery; seepage from grass above can linger
Time °C Rain Wind (km/h) Gust Hum
07:00 5° 2mm 11 25 94.96%
10:00 6° dry 11 24 90.92%
13:00 7° dry 16 30 72.87%
16:00 9° dry 13 26 70.3%
19:00 8° dry 13 27 80.7%
Fri Friday 23 October
Poor
Temp6°C
Rain17mm
Wind31 km/h
Gusts65 km/h
Humidity89%
16.5mm rain forecastWind 31 km/h, gusts 65 km/h — too windyHumidity 89% — potential fog
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
07:00 8° 0.2mm 11 20 94.1%
10:00 7° 3mm 29 60 97.38%
13:00 6° 3mm 33 65 92.38%
16:00 6° 1mm 32 65 77.76%
19:00 6° 0.3mm 26 52 72.5%
Sat Saturday 24 October
Poor
Temp9°C
Rain27mm
Wind32 km/h
Gusts71 km/h
Humidity96%
26.8mm rain forecastWind 32 km/h, gusts 71 km/h — too windyHumidity 96% — likely fog/cloud
  • Good temperature for mountain rhyolite
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
07:00 6° 0.6mm 18 36 94.14%
10:00 7° 3mm 29 58 95.29%
13:00 9° 8mm 36 71 95.57%
16:00 11° 9mm 32 63 96.32%
19:00 10° 5mm 33 66 92.54%
Sun Sunday 25 October
Poor
Temp7°C
Rain6mm
Wind31 km/h
Gusts65 km/h
Humidity74%
6mm rain forecastWind 31 km/h, gusts 65 km/h — too windy
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 6° 1mm 33 65 86.96%
09:00 6° 0.8mm 33 63 83.96%
12:00 7° 0.9mm 33 65 75.15%
15:00 8° 0.5mm 29 56 71.93%
18:00 7° 0.2mm 22 43 75.71%
21:00 7° dry 19 36 79.23%
Mon Monday 26 October
Poor
Temp11°C
Rain21mm
Wind35 km/h
Gusts68 km/h
Humidity94%
21.4mm rain forecastWind 35 km/h, gusts 68 km/h — too windyHumidity 94% — potential fog
  • Good temperature for mountain rhyolite
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 8° 2mm 24 45 93.52%
09:00 9° 4mm 28 53 94.77%
12:00 11° 5mm 34 64 94.65%
15:00 12° 4mm 36 68 92.93%
18:00 11° 3mm 35 66 92.15%
21:00 10° 3mm 33 63 89.99%
Tue Tuesday 27 October
Poor
Temp8°C
Rain9mm
Wind29 km/h
Gusts57 km/h
Humidity78%
9.2mm rain forecastWindy — 29 km/h, gusts 57 km/h
  • Good temperature for mountain rhyolite
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 7° 2mm 28 54 88.44%
09:00 7° 1mm 28 54 85%
12:00 8° 0.8mm 30 57 77.92%
15:00 8° 0.7mm 27 51 77.43%
18:00 8° 0.5mm 23 43 82.4%
21:00 7° 0.4mm 23 44 86.71%
Wed Wednesday 28 October
Poor
Temp8°C
Rain3mm
Wind24 km/h
Gusts—
Humidity—
3.3mm rain forecast
  • Good temperature for mountain rhyolite
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 8° 1mm 22 41 93.47%
09:00 8° 1mm 23 44 91.97%

About Idwal Slabs

East-facing slabs in Cwm Idwal — morning sun, multi-pitch routes to ~160m. Polished from popularity. The descent corner stays damp longer than the slabs themselves. Central drainage lines hold seepage for a while after heavy rain. Approach is a pleasant 20–25 minute walk along established stone paths from the Ogwen Cottage visitor centre. Weekend congestion is severe on popular routes — early starts help avoid long queues at stance belays. Classics include Hope (VD), Faith (VD) and Tennis Shoe (HS 4b); Lazarus (S 4a) is on Holly Tree Wall above the slabs.

Region
North Wales — Ogwen
Rock type
Rhyolite
Aspect
east-facing
Altitude
500m
Exposure
high
Seepage
medium

Other crags in this region

Clogwyn Bochlwyd (Bochlwyd Buttress)Idwal East Wall (Suicide Wall)Milestone ButtressRAC & Sheep Pen BouldersTryfan East Face