Right now

Temp15°C

Wind16 km/h

Gusts24 km/h

Humidity73.3%

Rain 48h1mm

Last rain32h ago

Assessment

Should be dry

Tidal access: Base submerged or wave-swept at high tide — climb strictly 2h 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 submerged or wave-swept at high tide — climb strictly 2h either side of low water.

Bird ban (02-01 to 07-31)
Bird ban applies to selected sectors within RSPB reserve; follow local signposts.

About North Stack

North Stack is an atmospheric coastal headland on Holyhead Mountain, featuring sheer cliffs of folded quartzite above the ocean. The rock character is extremely compact, offering steep face climbing, technical arêtes, and quartz hold features. Facing northwest, the cliff stays shaded until late afternoon, keeping temperatures cool while strong coastal winds help dry open surfaces. The route distribution focuses almost entirely on advanced multi-pitch traditional climbing, featuring famous lines such as The Strand and Wrath of Khan. Access requires a twenty-minute coastal walk from Holyhead Mountain parking followed by an abseil approach. Severe sea swells, tidal access restrictions, and loose rock on upper exit ramps demand full sea-cliff competence.

Region: North Wales — Anglesey - Gogarth
Rock type: Quartzite
Aspect: north-west-facing
Altitude: 30m
Exposure: high
Seepage: low

Other crags in this region

Castell Helen (Gogarth)South Stack & Yellow Wall Wen Zawn (Gogarth)