Right now

Temp15°C

Wind16 km/h

Gusts24 km/h

Humidity73.3%

Rain 48h1mm

Last rain32h ago

Assessment

Should be dry

Tidal access: Base and lower stances submerged at high tide — climb 3h either side of low water.

Good friction temperature range for quartzite

loose_rock

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Monday 28 September

Good

Temp0°C

Raindry

Wind16 km/h

Gusts24 km/h

Humidity73%

Should be dry

Quartzite holds friction well when dry

Time °C Rain Wind (km/h) Gust Hum

10:00 — dry — — null%

18:00 15° dry 16 — 73.3%

19:00 14° dry 18 — 82.3%

20:00 14° dry 18 — 83.9%

21:00 14° dry 19 — 80.3%

Tue Tuesday 29 September

Poor

Temp18°C

Rain6mm

Wind38 km/h

Gusts—

Humidity82%

5.9mm rain forecastWindy — 38 km/h, gusts 0 km/h

Wet quartzite is slippery but not damaged by climbing
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 14° dry 32 — 86.7%

07:00 14° dry 33 — 87%

08:00 15° dry 37 — 85.6%

09:00 16° dry 34 — 83%

10:00 16° dry 35 — 83.6%

11:00 17° dry 39 — 82.7%

12:00 18° dry 34 — 82.1%

13:00 19° dry 35 — 81.7%

14:00 19° dry 35 — 81.4%

15:00 20° dry 43 — 79.7%

16:00 20° dry 45 — 79.3%

17:00 20° dry 44 — 79.2%

18:00 20° dry 44 — 79.8%

19:00 20° 0.3mm 46 — 79.1%

20:00 19° dry 47 — 80%

21:00 19° 0.2mm 49 — 81.2%

Wed Wednesday 30 September

Poor

Temp16°C

Rain7mm

Wind45 km/h

Gusts—

Humidity80%

7mm rain forecastWind 45 km/h, gusts 0 km/h — too windy

Wet quartzite is slippery but not damaged by climbing
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 16° dry 35 — 87.1%

07:00 16° dry 41 — 87.7%

08:00 16° 0.1mm 43 — 85.3%

09:00 16° 0.2mm 44 — 84%

10:00 16° 0.1mm 44 — 81.3%

11:00 16° dry 48 — 80.8%

12:00 16° dry 48 — 81.5%

13:00 17° dry 45 — 79.1%

14:00 16° dry 44 — 79.8%

15:00 16° dry 44 — 79.3%

16:00 16° dry 44 — 80.5%

17:00 15° dry 43 — 82.3%

18:00 15° 0.2mm 41 — 84.1%

19:00 15° dry 43 — 82.2%

20:00 15° 0.2mm 37 — 81.9%

21:00 15° 0.3mm 34 — 82.6%

Thu Thursday 1 October

Caution

Temp15°C

Rain0.1mm

Wind31 km/h

Gusts—

Humidity71%

Should be dryWindy — 31 km/h, gusts 0 km/h

Quartzite holds friction well when dry
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 15° dry 27 — 76.1%

12:00 15° dry 31 — 70.6%

18:00 15° dry 36 — 76.7%

Fri Friday 2 October

Poor

Temp16°C

Rain0.7mm

Wind36 km/h

Gusts—

Humidity89%

0.7mm rain forecastWindy — 36 km/h, gusts 0 km/hHumidity 89% — potential fog

Wet quartzite is slippery but not damaged by climbing
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 16° 0.3mm 44 — 86%

12:00 16° dry 36 — 88.9%

18:00 16° dry 40 — 90%

Sat Saturday 3 October

Good

Temp13°C

Raindry

Wind9 km/h

Gusts—

Humidity75%

Should be dry

Quartzite holds friction well when dry

Time °C Rain Wind (km/h) Gust Hum

06:00 13° dry 18 — 81%

12:00 13° dry 9 — 75.4%

18:00 13° dry 7 — 74.8%

Sun Sunday 4 October

Caution

Temp15°C

Raindry

Wind23 km/h

Gusts—

Humidity85%

Should be dryHumidity 85% — potential fog

Quartzite holds friction well when dry
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 14° dry 16 — 74.5%

12:00 15° dry 23 — 84.7%

18:00 15° dry 23 — 90.1%

Mon Monday 5 October

Poor

Temp15°C

Raindry

Wind23 km/h

Gusts—

Humidity99%

Should be dryHumidity 99% — likely fog/cloud

Quartzite holds friction well when dry
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 15° dry 19 — 94.3%

12:00 15° dry 23 — 98.9%

18:00 15° dry 22 — 89.6%

Tidal access
Base and lower stances submerged at high tide — climb 3h either side of low water.

Bird ban (02-01 to 07-31)
Bird ban enforced on specific sectors within RSPB reserve; check local notices.

About South Stack & Yellow Wall

South Stack & Yellow Wall form a world-class sea cliff venue on Holy Island, composed of wildly folded quartzite rock. The rock offers magnificent friction, steep wall climbing, and intricate gear placements over crashing ocean waves. Facing west directly onto the Irish Sea, the cliff captures afternoon sun and dries fast in coastal winds, though sea spray can coat lower pitches. The climbing is famous for serious, highly exposed multi-pitch trad routes from HVS to extreme E-grades, dominated by the legendary A Dream of White Horses. The approach involves descending steep concrete steps toward the South Stack lighthouse before abseiling to lower stances. Tidal cutoff, massive swell hazards, and seasonal RSPB bird closures are critical considerations.

Region: North Wales — Anglesey - Gogarth
Rock type: Quartzite
Aspect: west-facing
Altitude: 50m
Exposure: high
Seepage: low

Other crags in this region

Castell Helen (Gogarth)North Stack Wen Zawn (Gogarth)