Climbing Forecast › North Wales — Anglesey › Holyhead Mountain

NORTH WALES — ANGLESEY · QUARTZITE

Holyhead Mountain climbing conditions

Caution — drying out or marginal

Right now

Temp17°C
Wind11.9 km/h
Gusts18 km/h
Humidity93.7%
Rain 48h0mm
Last rainNone recent

Assessment

No recent rain
Humidity 90% — potential fog
Humidity 93.7% — 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
Caution
Temp17°C
Rain0mm
Wind20 km/h
Gusts18 km/h
Humidity90%
No recent rainHumidity 90% — potential fog
  • Quartzite holds friction well when dry
Time °C Rain Wind Gust Hum
06:00 17° 0mm 12 0 93.7%
07:00 18° 0mm 14 0 93.9%
08:00 18° 0mm 18 0 94.8%
09:00 17° 0mm 20 0 95.7%
10:00 17° 0mm 22 0 95.8%
11:00 17° 0mm 25 0 90.7%
12:00 17° 0mm 24 0 90.3%
13:00 17° 0mm 21 0 89.5%
14:00 17° 0mm 18 0 89.5%
15:00 17° 0mm 16 0 88.5%
16:00 17° 0mm 14 0 86.9%
17:00 17° 0mm 16 0 85.4%
18:00 17° 0mm 16 0 83.4%
19:00 17° 0mm 14 0 83.2%
20:00 16° 0mm 18 0 85.5%
21:00 16° 0mm 23 0 82.1%
Sat Saturday 15 August
Good
Temp15°C
Rain0mm
Wind19 km/h
Gusts—
Humidity78%
No recent rain
  • Quartzite holds friction well when dry
Time °C Rain Wind Gust Hum
06:00 15° 0mm 25 0 85.4%
07:00 15° 0mm 25 0 85.2%
08:00 15° 0mm 24 0 86.2%
09:00 15° 0mm 22 0 86.7%
10:00 15° 0mm 19 0 85%
11:00 15° 0mm 19 0 84.4%
12:00 15° 0mm 20 0 82.3%
13:00 15° 0mm 20 0 78.5%
14:00 15° 0mm 19 0 74.3%
15:00 15° 0mm 18 0 72.7%
16:00 15° 0mm 16 0 72.1%
17:00 16° 0mm 13 0 70.1%
18:00 16° 0mm 12 0 67.5%
19:00 16° 0mm 12 0 64.8%
20:00 16° 0mm 9 0 64.7%
21:00 16° 0mm 10 0 67.2%
Sun Sunday 16 August
Good
Temp16°C
Rain0mm
Wind16 km/h
Gusts—
Humidity83%
No recent rain
  • Quartzite holds friction well when dry
Time °C Rain Wind Gust Hum
06:00 15° 0mm 13 0 83.7%
07:00 15° 0mm 10 0 82.7%
08:00 16° 0mm 10 0 83.1%
09:00 16° 0mm 10 0 83.4%
10:00 16° 0mm 10 0 83.1%
11:00 16° 0mm 11 0 83.6%
12:00 16° 0mm 15 0 85.1%
13:00 16° 0mm 17 0 85.1%
14:00 16° 0mm 20 0 84.7%
15:00 16° 0mm 19 0 81.9%
16:00 16° 0mm 21 0 78.5%
17:00 16° 0mm 23 0 80.3%
18:00 16° 0.03mm 25 0 83.5%
Mon Monday 17 August
Good
Temp16°C
Rain0mm
Wind11 km/h
Gusts—
Humidity89%
No recent rain
  • Quartzite holds friction well when dry
Time °C Rain Wind Gust Hum
06:00 16° 0mm 19 0 87.9%
12:00 16° 0mm 11 0 88.8%
18:00 17° 0mm 22 0 90.1%
Tue Tuesday 18 August
Poor
Temp17°C
Rain1.1mm
Wind21 km/h
Gusts—
Humidity96%
1.1mm rain forecastHumidity 96% — potential fog
  • Wet quartzite is slippery but not damaged by climbing
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 17° 1mm 29 0 93.4%
12:00 17° 0.1mm 21 0 95.5%
18:00 17° 0.02mm 10 0 88%
Wed Wednesday 19 August
Good
Temp15°C
Rain0mm
Wind23 km/h
Gusts—
Humidity87%
Should be dry
  • Quartzite holds friction well when dry
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 15° 0mm 20 0 85.4%
12:00 15° 0mm 23 0 86.6%
18:00 16° 0mm 30 0 80.9%
Thu Thursday 20 August
Poor
Temp15°C
Rain0.5mm
Wind30 km/h
Gusts—
Humidity83%
0.5mm rain forecast
  • Quartzite holds friction well when dry
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 14° 0mm 20 0 87.4%
12:00 15° 0.02mm 30 0 82.6%
18:00 16° 0.27mm 34 0 81.3%
Fri Friday 21 August
Poor
Temp15°C
Rain0.7mm
Wind29 km/h
Gusts—
Humidity80%
0.7mm rain forecast
  • Wet quartzite is slippery but not damaged by climbing
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 15° 0.18mm 34 0 85.7%
12:00 15° 0.05mm 29 0 80.4%
18:00 16° 0.12mm 21 0 78.4%
Sat Saturday 22 August
Poor
Temp15°C
Rain0.8mm
Wind15 km/h
Gusts—
Humidity85%
0.8mm rain forecast
  • Wet quartzite is slippery but not damaged by climbing
Time °C Rain Wind Gust Hum
06:00 14° 0.08mm 15 0 87.5%
12:00 15° 0mm 15 0 84.7%
18:00 15° 0.02mm 9 0 77.9%
Sun Sunday 23 August
Good
Temp14°C
Rain0.1mm
Wind25 km/h
Gusts—
Humidity77%
Should be dry
  • Quartzite holds friction well when dry
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 14° 0.02mm 28 0 85.8%
12:00 14° 0mm 25 0 77.4%
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.

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 CliffRhoscolyn