Right now

Temp10°C

Wind8 km/h

Gusts11 km/h

Humidity83.6%

Rain 48h1mm

Last rain32h ago

Assessment

Should be dry

Good friction temperature range for rhyolite

loose_rock

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Monday 28 September

Good

Temp0°C

Raindry

Wind8 km/h

Gusts11 km/h

Humidity84%

Should be dry

Cold mountain conditions — pack warm belay layers

Time °C Rain Wind (km/h) Gust Hum

10:00 — dry — — null%

18:00 10° dry 8 — 83.6%

19:00 9° dry 7 — 84.4%

20:00 9° dry 10 — 82.6%

21:00 9° dry 10 — 82.9%

Tue Tuesday 29 September

Good

Temp16°C

Raindry

Wind32 km/h

Gusts—

Humidity86%

Should be dry

Good temperature for mountain rhyolite
Damp mountain air — upper pitches may stay greasy
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 9° dry 20 — 96.3%

07:00 10° dry 22 — 96.2%

08:00 11° dry 25 — 92.5%

09:00 12° dry 24 — 89.4%

10:00 14° dry 30 — 84.3%

11:00 15° dry 33 — 83.2%

12:00 16° dry 34 — 82.8%

13:00 16° dry 34 — 84.9%

14:00 16° dry 32 — 87.7%

15:00 17° dry 30 — 87.8%

16:00 16° dry 31 — 90.6%

17:00 16° dry 33 — 92.8%

18:00 16° dry 32 — 92.1%

19:00 17° dry 31 — 89.6%

20:00 17° dry 29 — 88.1%

21:00 17° dry 30 — 88.2%

Wed Wednesday 30 September

Poor

Temp16°C

Rain21mm

Wind23 km/h

Gusts—

Humidity84%

20.9mm 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 17° 2mm 25 — 96.6%

07:00 15° dry 20 — 96.5%

08:00 15° dry 19 — 93.2%

09:00 16° 0.2mm 20 — 92.4%

10:00 16° 0.5mm 23 — 89.6%

11:00 16° 0.4mm 25 — 89.3%

12:00 17° 0.4mm 24 — 84.1%

13:00 16° 0.2mm 24 — 82.2%

14:00 17° 0.2mm 24 — 77.2%

15:00 16° 0.4mm 23 — 79.8%

16:00 15° 0.1mm 19 — 86.7%

17:00 14° dry 18 — 88.6%

18:00 14° dry 17 — 89.1%

19:00 13° 0.1mm 15 — 92.5%

20:00 13° 0.2mm 17 — 93.1%

21:00 12° dry 16 — 95.1%

Thu Thursday 1 October

Poor

Temp14°C

Rain2mm

Wind16 km/h

Gusts—

Humidity79%

2.2mm rain forecast

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger

Time °C Rain Wind (km/h) Gust Hum

06:00 11° dry 13 — 97.6%

12:00 14° 0.1mm 16 — 78.6%

18:00 11° 0.1mm 13 — 87.3%

Fri Friday 2 October

Poor

Temp14°C

Rain5mm

Wind22 km/h

Gusts—

Humidity96%

5mm rain forecastHumidity 96% — 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 12° 2mm 16 — 97.4%

12:00 14° 0.8mm 22 — 95.9%

18:00 14° 1mm 21 — 95.4%

Sat Saturday 3 October

Caution

Temp12°C

Rain0.1mm

Wind12 km/h

Gusts—

Humidity71%

Drying — 18h since rain

Good temperature for mountain rhyolite

Time °C Rain Wind (km/h) Gust Hum

06:00 9° dry 8 — 99.6%

12:00 12° dry 12 — 70.8%

18:00 10° dry 5 — 87%

Sun Sunday 4 October

Good

Temp13°C

Rain0.1mm

Wind13 km/h

Gusts—

Humidity86%

Should be dry

Good temperature for mountain rhyolite
Damp mountain air — upper pitches may stay greasy

Time °C Rain Wind (km/h) Gust Hum

06:00 8° dry 6 — 90.7%

12:00 13° dry 13 — 86%

18:00 13° dry 10 — 97.4%

Mon Monday 5 October

Poor

Temp14°C

Rain0.3mm

Wind15 km/h

Gusts—

Humidity99%

0.3mm rain forecastHumidity 99% — likely fog/cloud

Good temperature for mountain rhyolite
Damp mountain air — upper pitches may stay greasy

Time °C Rain Wind (km/h) Gust Hum

06:00 14° dry 12 — 99.4%

12:00 14° dry 15 — 99%

18:00 13° dry 10 — 99.2%

About Castle Rock of Triermain

Castle Rock of Triermain is a famous, historically significant rock bastion standing above St. John's in the Vale, composed of fine volcanic rock. The remaining intact sectors face north and west, receiving limited direct sunshine and requiring breeze to thoroughly dry wet crack lines. The crag features outstanding multi-pitch trad routes from Severe to top-tier E-grades, renowned for steepness and exceptional hold quality. Historic testpieces like Overhanging Wall showcase sustained wall movement on solid, steep rock. The approach takes roughly fifteen minutes up a steady hillside path from the valley laybys. A catastrophic major rockfall destroyed the iconic South Company face, so staying strictly on established routes on the North Top is paramount for safety.

Region: Lake District — Thirlmere
Rock type: Rhyolite
Aspect: north-facing
Altitude: 280m
Exposure: medium
Seepage: medium

Other crags in this region

Bramcrag Quarry Fishercrag Raven Crag (Thirlmere)