Right now

Temp15°C

Wind26 km/h

Gusts39 km/h

Humidity84.8%

Rain 48hdry

Last rainNone recent

Assessment

No recent rain

Good friction temperature range for granite

Breezy — good for drying

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Monday 28 September

Good

Temp0°C

Raindry

Wind26 km/h

Gusts39 km/h

Humidity85%

No recent rain

Time °C Rain Wind (km/h) Gust Hum

10:00 — dry — — null%

18:00 15° dry 26 — 84.8%

19:00 15° dry 28 — 86.3%

20:00 15° dry 31 — 86.2%

21:00 15° dry 32 — 86.3%

Tue Tuesday 29 September

Poor

Temp18°C

Rain21mm

Wind42 km/h

Gusts—

Humidity91%

21.3mm rain forecastWindy — 42 km/h, gusts 0 km/hHumidity 91% — potential fog

Good conditions for granite
Very windy — exposed routes will be unpleasant
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 16° dry 31 — 95.7%

07:00 16° dry 37 — 95%

08:00 17° dry 36 — 94.4%

09:00 17° dry 38 — 94.5%

10:00 17° dry 40 — 93.1%

11:00 18° dry 40 — 92.6%

12:00 18° dry 40 — 92.4%

13:00 19° dry 40 — 90.6%

14:00 19° 0.2mm 40 — 88.4%

15:00 19° 2mm 45 — 87.8%

16:00 18° 0.4mm 46 — 94%

17:00 18° 5mm 48 — 92%

18:00 18° 3mm 49 — 91.4%

19:00 18° 4mm 51 — 92.1%

20:00 18° 4mm 50 — 91.8%

21:00 18° 2mm 47 — 92.1%

Wed Wednesday 30 September

Poor

Temp17°C

Rain1mm

Wind35 km/h

Gusts—

Humidity73%

1.3mm rain forecastWindy — 35 km/h, gusts 0 km/h

Good conditions for granite
Very windy — exposed routes will be unpleasant
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 17° dry 33 — 80%

07:00 17° dry 36 — 78.6%

08:00 17° dry 36 — 76.3%

09:00 17° dry 37 — 72.7%

10:00 17° dry 32 — 74.6%

11:00 18° 0.2mm 35 — 71.8%

12:00 18° dry 34 — 72.6%

13:00 18° 0.5mm 35 — 71%

14:00 16° 0.2mm 39 — 78.5%

15:00 17° dry 32 — 73.5%

16:00 17° 0.1mm 35 — 70.6%

17:00 16° 0.1mm 36 — 70.7%

18:00 16° 0.1mm 28 — 77%

19:00 16° 0.1mm 28 — 71.2%

20:00 16° dry 28 — 71.4%

21:00 15° dry 25 — 77.3%

Thu Thursday 1 October

Poor

Temp17°C

Rain1mm

Wind25 km/h

Gusts—

Humidity64%

1mm rain forecast

Good conditions for granite
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 14° dry 27 — 75.9%

12:00 17° dry 25 — 63.6%

18:00 16° dry 21 — 72.2%

Fri Friday 2 October

Good

Temp18°C

Raindry

Wind21 km/h

Gusts—

Humidity78%

Should be dry

Good conditions for granite
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 16° dry 21 — 81.5%

12:00 18° dry 21 — 78%

18:00 16° dry 11 — 84%

Sat Saturday 3 October

Good

Temp18°C

Raindry

Wind8 km/h

Gusts—

Humidity84%

Should be dry

Good conditions for granite

Time °C Rain Wind (km/h) Gust Hum

06:00 15° dry 7 — 92.5%

12:00 18° dry 8 — 83.7%

18:00 16° dry 13 — 93.3%

Sun Sunday 4 October

Good

Temp16°C

Raindry

Wind7 km/h

Gusts—

Humidity77%

Should be dry

Good conditions for granite

Time °C Rain Wind (km/h) Gust Hum

06:00 13° dry 7 — 93.7%

12:00 16° dry 7 — 76.9%

18:00 15° dry 8 — 84.9%

Mon Monday 5 October

Good

Temp17°C

Raindry

Wind9 km/h

Gusts—

Humidity80%

Should be dry

Good conditions for granite

Time °C Rain Wind (km/h) Gust Hum

06:00 11° dry 4 — 98%

12:00 17° dry 9 — 79.8%

18:00 15° dry 5 — 88.4%

About Chun Castle Boulders

Chun Castle Boulders are a collection of coarse granite tor blocks situated near the historic iron-age hill fort of Chun Castle. The rock character offers high-friction granite with crisp crimps, sloper mantels, and clean compression edges across low-lying blocks. Facing all directions across the hilltop, boulderers can easily choose sunny or shaded problems throughout the day. Bouldering options span friendly introductory problems up to technical 7th grade roof testpieces, featuring lines like Chun Arete. Access takes ten minutes along clear moorland paths from minor road parking near Chun Farm. Open moorland winds ensure quick drying after rainfall.

Region: Cornwall — West Penwith
Rock type: Granite
Altitude: 210m
Exposure: medium
Seepage: low

Other crags in this region

Aire Point Cape Cornwall Carn Barra Carn Galver Carn Gloose Carn Les Boel Gurnard's Head Kenidjack Cliff Pedn-a-Vounder Pendeen Watch Porth Ledden Porthcurno Rosemergy Mountain Zennor Aerie