Climbing Forecast › Southern Sandstone › Harrison's Rocks

SOUTHERN SANDSTONE · SANDSTONE

Harrison's Rocks climbing conditions

Poor — wet, too windy or closed

Right now

Temp13°C
Wind10 km/h
Gusts16 km/h
Humidity93.1%
Rain 48hdry
Last rainNone recent

Assessment

0.4mm rain forecast
Do not climb wet sandstone
Humidity 93.1% — potential fog/cloud, rock may be damp from condensation
Check sandstone is genuinely dry — condensation can wet the surface

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Sunday 6 September
Poor
Temp23°C
Rain0.4mm
Wind17 km/h
Gusts16 km/h
Humidity48%
0.4mm rain forecastDo not climb wet sandstone
  • Do not climb — wet soft sandstone is damaged by climbing
Time °C Rain Wind (km/h) Gust Hum
06:00 13° dry 10 — 93.1%
07:00 15° dry 11 — 91.5%
08:00 17° dry 14 — 81.7%
09:00 19° dry 16 — 68.9%
10:00 21° dry 16 — 57.2%
11:00 22° dry 17 — 50.7%
12:00 23° dry 17 — 46.9%
13:00 24° dry 17 — 43.8%
14:00 24° dry 16 — 43.2%
15:00 24° dry 16 — 43.9%
16:00 23° dry 18 — 48.8%
17:00 21° 0.2mm 17 — 58.6%
18:00 19° 0.2mm 15 — 70.2%
19:00 19° dry 15 — 72.6%
20:00 19° dry 12 — 70.6%
21:00 18° dry 13 — 71.3%
Mon Monday 7 September
Good
Temp21°C
Rain0.1mm
Wind23 km/h
Gusts—
Humidity67%
No recent rain
  • Check rock is fully dry before climbing
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 16° dry 17 — 87.4%
07:00 17° dry 16 — 85.4%
08:00 19° dry 19 — 81%
09:00 20° dry 22 — 77%
10:00 21° dry 21 — 69.6%
11:00 21° 0.1mm 20 — 65.7%
12:00 22° dry 22 — 68.3%
13:00 20° dry 22 — 75.6%
14:00 22° dry 25 — 63.5%
15:00 21° dry 27 — 61%
16:00 20° dry 26 — 64.8%
17:00 19° dry 24 — 66.7%
18:00 19° dry 22 — 68.5%
19:00 17° dry 20 — 72.6%
20:00 17° dry 20 — 74.7%
21:00 17° dry 19 — 79.1%
Tue Tuesday 8 September
Good
Temp20°C
Raindry
Wind22 km/h
Gusts—
Humidity43%
No recent rain
  • Check rock is fully dry before climbing
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 15° dry 17 — 84.9%
07:00 16° dry 17 — 81.3%
08:00 16° dry 18 — 75%
09:00 16° dry 20 — 60.6%
10:00 18° dry 20 — 49.2%
11:00 19° dry 18 — 44.7%
12:00 20° dry 22 — 40.7%
13:00 20° dry 25 — 42.3%
14:00 20° dry 24 — 42.4%
15:00 20° dry 24 — 42.4%
16:00 20° dry 24 — 41.3%
17:00 19° dry 24 — 41.3%
18:00 18° dry 20 — 42.7%
Wed Wednesday 9 September
Good
Temp19°C
Raindry
Wind21 km/h
Gusts—
Humidity43%
No recent rain
  • Check rock is fully dry before climbing
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 11° dry 16 — 84.4%
12:00 19° dry 21 — 42.6%
18:00 17° dry 8 — 44.5%
Thu Thursday 10 September
Good
Temp18°C
Rain0.1mm
Wind17 km/h
Gusts—
Humidity58%
No recent rain
  • Check rock is fully dry before climbing
Time °C Rain Wind (km/h) Gust Hum
06:00 11° dry 9 — 81.3%
12:00 18° dry 17 — 57.7%
18:00 17° dry 22 — 75.6%
Fri Friday 11 September
Good
Temp21°C
Raindry
Wind19 km/h
Gusts—
Humidity53%
No recent rain
  • Check rock is fully dry before climbing
Time °C Rain Wind (km/h) Gust Hum
06:00 15° dry 16 — 90.9%
12:00 21° dry 19 — 52.6%
18:00 20° dry 14 — 50.7%
Sat Saturday 12 September
Good
Temp19°C
Raindry
Wind5 km/h
Gusts—
Humidity50%
No recent rain
  • Check rock is fully dry before climbing
Time °C Rain Wind (km/h) Gust Hum
06:00 10° dry 9 — 92.7%
12:00 19° dry 5 — 50.2%
18:00 17° dry 16 — 61.1%
Sun Sunday 13 September
Poor
Temp21°C
Rain0.6mm
Wind22 km/h
Gusts—
Humidity80%
0.6mm rain forecastDo not climb wet sandstone
  • Do not climb — wet soft sandstone is damaged by climbing
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 16° 0.5mm 23 — 90.5%
12:00 21° dry 22 — 79.9%
18:00 19° dry 18 — 68.4%

About Harrison's Rocks

NEVER climb when wet — damages rock. BMC access agreement. Harrison's Rocks is the flagship sand-rock venue in the Weald, situated in lush woodland near Groombridge in East Sussex. The rock character is soft, highly friable Ardingly sandstone, featuring delicate honeycomb pockets, smooth friction slabs, and narrow vertical cracks. Facing predominantly north and shaded by dense forest canopy, the crag remains cool and takes time to dry following prolonged rain, requiring patience to avoid damaging wet rock. The climbing is strictly restricted to top-roping and soloing across all grades from 3 to 7a, with landmark lines like Slim Finger Crack and Niblick. The approach takes ten minutes along flat paths from the dedicated BMC toilet car park. Strict soft-rock ethics prohibit leading, placement of metal gear, or rope-rub across the crag top.

Region
Southern Sandstone
Rock type
Sandstone
Aspect
north-facing
Altitude
120m
Exposure
low
Seepage
high

Other crags in this region

Bowles RocksHigh Rocks