Climbing Forecast › Snowdonia — Llanberis › Dinorwic Slate Quarry (Rainbow Slab)

SNOWDONIA — LLANBERIS · SLATE

Dinorwic Slate Quarry (Rainbow Slab) climbing conditions

Poor — wet, too windy or closed

Right now

Temp18°C
Wind10.9 km/h
Gusts14 km/h
Humidity91.22%
Rain 48h0mm
Last rainNone recent

Assessment

0.4mm rain forecast
Humidity 91.22% — potential fog/cloud, rock may be damp from condensation

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Friday 14 August
Poor
Temp19°C
Rain0.4mm
Wind10 km/h
Gusts20 km/h
Humidity83%
0.4mm rain forecast
Time °C Rain Wind Gust Hum
06:00 18° 0mm 11 14 91.22%
09:00 20° 0mm 8 13 83.88%
12:00 20° 0.22mm 9 15 90.87%
15:00 19° 0.16mm 12 20 75.71%
18:00 18° 0mm 10 19 71.33%
21:00 17° 0mm 6 16 85.68%
Sat Saturday 15 August
Poor
Temp17°C
Rain0.7mm
Wind15 km/h
Gusts26 km/h
Humidity59%
0.7mm rain forecast
Time °C Rain Wind Gust Hum
06:00 15° 0.7mm 10 19 89.44%
09:00 16° 0mm 15 27 71.24%
12:00 17° 0mm 15 26 60.97%
15:00 17° 0mm 15 26 57.02%
18:00 17° 0mm 12 22 59.77%
21:00 15° 0mm 4 11 75.45%
Sun Sunday 16 August
Good
Temp18°C
Rain0mm
Wind13 km/h
Gusts26 km/h
Humidity61%
Should be dry
Time °C Rain Wind Gust Hum
06:00 13° 0mm 5 8 83.77%
09:00 15° 0mm 7 16 67.77%
12:00 17° 0mm 12 25 61.22%
15:00 18° 0mm 14 26 61.66%
18:00 17° 0mm 12 21 65.06%
21:00 16° 0mm 11 17 80.7%
Mon Monday 17 August
Poor
Temp18°C
Rain0.7mm
Wind17 km/h
Gusts32 km/h
Humidity75%
0.7mm rain forecast
Time °C Rain Wind Gust Hum
06:00 15° 0mm 11 19 90.41%
09:00 16° 0mm 15 26 82.74%
12:00 18° 0mm 17 31 76.15%
15:00 19° 0mm 18 32 73.97%
18:00 19° 0mm 20 33 79.9%
21:00 17° 0.74mm 21 35 91.11%
Tue Tuesday 18 August
Poor
Temp18°C
Rain4.3mm
Wind21 km/h
Gusts37 km/h
Humidity80%
4.3mm rain forecast
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 17° 0.65mm 20 33 93.86%
09:00 17° 0.93mm 21 35 91.24%
12:00 17° 0.83mm 22 37 83.3%
15:00 18° 0.49mm 21 35 77.59%
18:00 18° 0mm 18 29 78.95%
21:00 17° 0.39mm 16 27 86%
Wed Wednesday 19 August
Poor
Temp16°C
Rain0.5mm
Wind22 km/h
Gusts41 km/h
Humidity68%
0.5mm rain forecast
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 14° 0mm 18 30 85.17%
09:00 15° 0mm 22 38 77.77%
12:00 16° 0mm 23 41 68.99%
15:00 17° 0mm 22 37 66.58%
18:00 17° 0.17mm 19 31 70.15%
21:00 16° 0.31mm 17 28 80.78%
Thu Thursday 20 August
Poor
Temp16°C
Rain2.2mm
Wind20 km/h
Gusts37 km/h
Humidity70%
2.2mm rain forecast
Time °C Rain Wind Gust Hum
06:00 13° 0.45mm 17 28 87.4%
09:00 14° 0.56mm 20 35 79.36%
12:00 15° 0.58mm 21 37 72.16%
15:00 16° 0.65mm 20 35 67.74%
18:00 16° 0mm 17 29 70.86%
21:00 15° 0mm 14 22 81.7%
Fri Friday 21 August
Good
Temp13°C
Rain0mm
Wind13 km/h
Gusts—
Humidity—
Should be dry
Dinorwic Slate Quarry (Rainbow Slab) is a legendary slate venue set high in the upper levels of Dinorwic, famed for its distinctively striped, multi-coloured slate face. The slate is exceptionally slick and compact, demanding utmost precision on microscopic crimps, delicate balance moves, and small wire placements. Facing southwest, the massive slab receives brilliant afternoon sunshine and dries extremely fast, though strong winds can sweep across the upper quarry levels. The sector caters primarily to intermediate and advanced traditional climbers, alongside select sport lines, with classics like Rainbow Bridge and Pull My Daisy drawing testpiece hunters. The approach involves a twenty-five minute uphill walk via steep quarry tracks from Llanberis or Marchlyn. The sheer drop-offs and loose slate ramps require constant vigilance during approaches and descents.

About Dinorwic Slate Quarry (Rainbow Slab)

Dinorwic Slate Quarry (Rainbow Slab) is a legendary slate venue set high in the upper levels of Dinorwic, famed for its distinctively striped, multi-coloured slate face. The slate is exceptionally slick and compact, demanding utmost precision on microscopic crimps, delicate balance moves, and small wire placements. Facing southwest, the massive slab receives brilliant afternoon sunshine and dries extremely fast, though strong winds can sweep across the upper quarry levels. The sector caters primarily to intermediate and advanced traditional climbers, alongside select sport lines, with classics like Rainbow Bridge and Pull My Daisy drawing testpiece hunters. The approach involves a twenty-five minute uphill walk via steep quarry tracks from Llanberis or Marchlyn. The sheer drop-offs and loose slate ramps require constant vigilance during approaches and descents.

Region
Snowdonia — Llanberis
Rock type
slate
Aspect
south-west-facing
Altitude
320m
Exposure
medium
Seepage
low

Other crags in this region

Dinorwic Slate Quarry (Australia Quarry)Dinorwic Slate Quarry (California & Bus Stop)Dinorwic Slate Quarry (Vivian)