Right now

Temp14°C

Wind16 km/h

Gusts24 km/h

Humidity73.3%

Rain 48h1mm

Last rain32h ago

Assessment

Should be dry

Good friction temperature range for quartzite

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 14° dry 16 — 73.3%

19:00 13° dry 18 — 82.3%

20:00 13° dry 18 — 83.9%

21:00 13° 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 13° dry 32 — 86.7%

07:00 14° dry 33 — 87%

08:00 14° dry 37 — 85.6%

09:00 15° dry 34 — 83%

10:00 16° dry 35 — 83.6%

11:00 17° dry 39 — 82.7%

12:00 17° dry 34 — 82.1%

13:00 18° dry 35 — 81.7%

14:00 18° dry 35 — 81.4%

15:00 19° dry 43 — 79.7%

16:00 19° dry 45 — 79.3%

17:00 19° dry 44 — 79.2%

18:00 19° dry 44 — 79.8%

19:00 19° 0.3mm 46 — 79.1%

20:00 19° dry 47 — 80%

21:00 18° 0.2mm 49 — 81.2%

Wed Wednesday 30 September

Poor

Temp16°C

Rain7mm

Wind45 km/h

Gusts—

Humidity80%

7mm rain forecastWindy — 45 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 16° dry 35 — 87.1%

07:00 16° dry 41 — 87.7%

08:00 16° 0.1mm 43 — 85.3%

09:00 15° 0.2mm 44 — 84%

10:00 16° 0.1mm 44 — 81.3%

11:00 16° dry 48 — 80.8%

12:00 15° dry 48 — 81.5%

13:00 16° dry 45 — 79.1%

14:00 16° dry 44 — 79.8%

15:00 16° dry 44 — 79.3%

16:00 15° 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 14° 0.3mm 34 — 82.6%

Thu Thursday 1 October

Good

Temp15°C

Rain0.1mm

Wind31 km/h

Gusts—

Humidity71%

Should be dry

Quartzite holds friction well when dry
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 14° dry 27 — 76.1%

12:00 15° dry 31 — 70.6%

18:00 15° dry 36 — 76.7%

Fri Friday 2 October

Poor

Temp15°C

Rain0.7mm

Wind36 km/h

Gusts—

Humidity89%

0.7mm rain forecastWindy — 36 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 15° 0.3mm 44 — 86%

12:00 15° dry 36 — 88.9%

18:00 15° 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 12° dry 7 — 74.8%

Sun Sunday 4 October

Good

Temp14°C

Raindry

Wind23 km/h

Gusts—

Humidity85%

Should be dry

Quartzite holds friction well when dry
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 13° dry 16 — 74.5%

12:00 14° dry 23 — 84.7%

18:00 14° dry 23 — 90.1%

Mon Monday 5 October

Poor

Temp14°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 14° dry 23 — 98.9%

18:00 14° dry 22 — 89.6%

About Holyhead Mountain

Holyhead Mountain is the primary non-tidal crag on Anglesey, featuring immaculate quartzite rock overlooking the Irish Sea. The rock is exceptionally solid, offering sharp crimps, clean cracks, and high-friction slab faces that dry almost immediately after rain. Facing west, the cliff captures full afternoon sunlight and benefits from constant coastal air currents. The crag offers a dense concentration of traditional routes from Diff up to E5, making it one of North Wales' most popular mid-grade destinations. Classic routes like King Bee Crack and Branwen showcase pristine wall and crack climbing on sound rock. The approach takes a simple ten-minute walk along clear paths from the Breakwater Country Park car park. Exposure to strong westerly winds is the primary environmental factor.

Region: North Wales — Anglesey
Rock type: Quartzite
Aspect: west-facing
Altitude: 180m
Exposure: medium
Seepage: low

Other crags in this region

Gogarth Main Cliff Penmon Point (Trwyn Penmon)Rhoscolyn