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

SNOWDONIA — LLANBERIS · SLATE

Dinorwic Slate Quarry (Rainbow Slab) climbing conditions

Good — dry and climbable

Right now

Temp16°C
Wind2 km/h
Gusts5 km/h
Humidity69.53%
Rain 48hdry
Last rainNone recent

Assessment

No recent rain

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Monday 28 September
Good
Temp16°C
Raindry
Wind10 km/h
Gusts12 km/h
Humidity53%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
15:00 16° dry 10 12 52.79%
18:00 16° dry 2 5 69.53%
21:00 13° dry 8 24 69.84%
Tue Tuesday 29 September
Caution
Temp18°C
Raindry
Wind28 km/h
Gusts59 km/h
Humidity76%
No recent rainWindy — 28 km/h, gusts 59 km/h
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 13° dry 18 43 85.18%
09:00 14° dry 22 51 82.11%
12:00 17° dry 28 59 78.92%
15:00 20° dry 28 58 74.01%
18:00 21° dry 26 56 72.17%
21:00 20° dry 28 59 73.3%
Wed Wednesday 30 September
Poor
Temp17°C
Rain17mm
Wind29 km/h
Gusts53 km/h
Humidity72%
17.1mm rain forecastWindy — 29 km/h, gusts 53 km/h
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 15° 4mm 16 34 89.2%
09:00 15° 0.5mm 23 43 84.18%
12:00 17° 0.6mm 29 53 71.56%
15:00 17° dry 28 49 72.04%
18:00 16° dry 22 39 82.12%
21:00 14° 0.3mm 19 32 87.96%
Thu Thursday 1 October
Poor
Temp15°C
Rain1mm
Wind23 km/h
Gusts40 km/h
Humidity69%
1mm rain forecast
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 12° dry 15 24 87.58%
09:00 13° dry 18 30 80.38%
12:00 14° 0.3mm 22 38 69.68%
15:00 15° dry 24 40 67.52%
18:00 14° dry 20 32 77.28%
21:00 14° dry 22 36 80.1%
Fri Friday 2 October
Poor
Temp15°C
Rain7mm
Wind23 km/h
Gusts39 km/h
Humidity81%
6.8mm rain forecast
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 14° 2mm 22 36 91.97%
09:00 14° 2mm 21 35 89.91%
12:00 15° 0.7mm 23 39 81.13%
15:00 16° dry 23 39 80.86%
18:00 15° 0.4mm 18 29 89.07%
21:00 14° dry 16 25 91.93%
Sat Saturday 3 October
Good
Temp15°C
Raindry
Wind16 km/h
Gusts29 km/h
Humidity80%
Should be dry
Time °C Rain Wind (km/h) Gust Hum
06:00 12° dry 12 20 94.1%
09:00 13° dry 13 23 88.23%
12:00 15° dry 16 29 80.77%
15:00 15° dry 16 28 79.46%
18:00 14° dry 12 20 89.41%
21:00 13° dry 12 19 92.62%
Sun Sunday 4 October
Good
Temp15°C
Raindry
Wind12 km/h
Gusts22 km/h
Humidity79%
Should be dry
Time °C Rain Wind (km/h) Gust Hum
06:00 12° dry 10 16 94.28%
09:00 13° dry 11 18 87.9%
12:00 14° dry 12 22 78.83%
15:00 15° dry 12 21 78.33%
18:00 14° dry 9 14 88.67%
21:00 12° dry 9 14 92.17%
Mon Monday 5 October
Good
Temp15°C
Raindry
Wind11 km/h
Gusts22 km/h
Humidity79%
Should be dry
Time °C Rain Wind (km/h) Gust Hum
06:00 11° dry 10 15 94.63%
09:00 12° dry 10 17 88.08%
12:00 14° dry 12 22 78.67%
15:00 16° dry 11 20 78.63%

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

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