Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Thursday 15th January 2026
Last updated
Wed 14th Jan 26 at
4:46PM
Summary for all mountain areas
Blustery and chilly south-westerly winds bringing occasional snow and hail showers, most prevalent across the west Highlands. Rain falling below 500m. Drier for England and Wales, but risk of marked deterioration later for southern and eastern Wales as rain and summit snow edges in from the south.
Headline for Eryri / Snowdonia National Park
Blustery with showers. Persistent rain and summit snow may arrive later in east.
How windy? (On the summits)
South to southwesterly 25mph at dawn, then easing down to give a pronounced lull before an easterly develops toward or after dusk, 30mph.
Effect of the wind on you?
Mostly fairly small.
How Wet?
Risk showers
Chance showers morning west Wales, snow tops, but fading. Also risk persistent rain late in day (snow higher slopes), mainly east Wales and into mid Wales.
Cloud on the hills?
May well clear most summits
Cloud base likely to lift toward 900m widely, possibly sometimes clearing higher tops. Risk though in precipitation later of cloud filling in extensively across the hills, mainly eastern areas.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Patches of sunshine - may give way to thickening cloud. Visibility excellent but very poor in precipitation.
How Cold? (at 900m)
0 or 1C
Freezing Level
900 or 1000m.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 16th January 2026
Last updated
Wed 14th Jan 26 at
4:46PM
How windy? (On the summits)
Low confidence in detail: Southwesterly backing southerly 25 to 40mph, steady rise through day, strongest by dusk.
Effect of the wind on you?
Be prepared for increasingly blustery or even arduous conditions to develop, after perhaps a lull in the morning.
How Wet?
Scattered showers
Scattered showers moving in from the southwest, snow above 800m, hail at times to lower slopes.
Cloud on the hills?
Fairly extensive, best breaks north.
Cloud very likely fairly extensive across upper slopes. Best breaks across northern most tops. General bases around 600-800m.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Little or no sun. Visibility good or very good away from showers.
How Cold? (at 900m)
0C
Freezing Level
900m
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 17th January 2026
Last updated
Wed 14th Jan 26 at
4:46PM
How windy? (On the summits)
South-easterly 15 to 25mph, but perhaps up to 30mph up the west coast and some tops inland.
Effect of the wind on you?
Mostly small, but wind chill still significant where exposed to the strongest wind.
How Wet?
Often dry, but patchy rain possible.
Occasional showers or patches of rain.
Cloud on the hills?
Varied banks of low cloud
Varied low cloud across the area. Banks of patches from mid to upper slopes, perhaps fairly extensive in coverage. Best breaks toward the west coast.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Mostly overcast. Rather hazy with poor visibility where patches of rain occur.
How Cold? (at 900m)
2 or 3C, small rate of change in temperature with height. Feeling closer to -5C in the strongest wind.
Freezing Level
Above the summits
Planning Outlook
A small scale low will pull away early on Friday morning to the North Sea to leave drier and chilly conditions into the weekend with a south to south-easterly airflow developing. Looking further ahead, a colder continental influence may be drawn in on south to east winds, but the extent of this is uncertain. The snow pack across the Scottish Highlands will be enhanced by further spells of snowfall where where fronts edge in from the west, whilst for England and Wales snow accumulating on the hills at times, perhaps in the form of showers from the east.