Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 28th October 2025
Last updated
Mon 27th Oct 25 at
12:58PM
Summary for all mountain areas
For most, gusty upland gale or near gale force westerly winds, together with showers and fog covering most higher areas. More complicated in N Scotland, where low freezing level, but locally relatively benign with lighter wind and breaks in the cloud and precipitation.
Headline for Eryri / Snowdonia National Park
Upland gales or near gales. Showers.
How windy? (On the summits)
Westerly; speeds typically 35mph - but not necessarily on highest areas, some gusty conditions, with general speed near 55mph.
Effect of the wind on you?
Arduous or difficult conditions with significant wind chill/buffeting. Strongest winds not necessarily on highest slopes.
How Wet?
Showers
Showers for time to time mainly morning, where frequent some western mountains.
Cloud on the hills?
Persistent across higher areas all day.
Cloud base typically 700m, but in rain lowering to 300 to 450m.
Chance of cloud free summits?
Less than 10%
Sunshine and air clarity?
Glimpses of sunshine, mainly east Wales. Hazy at best; poor visibility in rain.
How Cold? (at 900m)
5C. Will feel as cold as -8C in the strongest winds.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 29th October 2025
Last updated
Mon 27th Oct 25 at
12:58PM
How windy? (On the summits)
West to southwesterly 25 to 35mph; widest Snowdon range.
Effect of the wind on you?
Walking often arduous higher up and considerable wind chill.
How Wet?
Risk showers
Showers from time to time. Also rain to the south may edge into mid Wales for a few hours.
Cloud on the hills?
Extensive across higher areas
Some variation, but broadly cloud base 550 to 750m, dropping to around 300 to 450m in rain. Generally highest cloud base east and mid Wales.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Patches of sunshine, mainly east Wales - perhaps fading due to a veil of high level cloud. Visibility very good.
How Cold? (at 900m)
3C
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 30th October 2025
Last updated
Mon 27th Oct 25 at
12:58PM
How windy? (On the summits)
Southeasterly 20mph post dawn. Progressively strengthening: 40, perhaps 60mph western summits mid afternoon.
Effect of the wind on you?
Deteriorating as buffeting and wind chill become very considerable. General mobility may become difficult.
How Wet?
Rain setting in middle of day onwards
Dry most or all morning. Rain then setting in.
Cloud on the hills?
Becoming extensive: very little morning
Fragments some higher slopes, but most summits cloud free most or all morning. Deteriorating in rain as cloud fills in across higher slopes, and particularly east Wales patches form above 300 or 400m.
Chance of cloud free summits?
80% at first dropping to 10%
Sunshine and air clarity?
Little or no sun as cloud soon thickens. Excellent visibility before becoming poor in rain.
How Cold? (at 900m)
3C; rising slowly through the day.
Freezing Level
Above the summits.
Planning Outlook
Frequently windy toward and through next weekend with widespread upland gales - possibly storm force - bands of rain and low cloud. Warmer than at present. These conditions are likely to continue well into November as a lengthy series of Atlantic lows and associated fronts cross Britain.