Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail. Visibility may change rapidly from excellent to very poor.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail. Visibility may change rapidly from excellent to very poor.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 2nd January 2026
Last updated
Thu 1st Jan 26 at
4:00PM
Summary for all mountain areas
Bitterly cold north-northwesterly winds, gale-force over many hills, typically strongest in morning, again late in day Scotland. Frequent snow and hail northern Scotland, blizzard conditions on mountains. Showers also affect Wales. Mostly dry, sunny and clear hills N England & S Scotland. Most terrain frozen.
Headline for Eryri / Snowdonia National Park
Windy, gales tops, significant chill factor. Snow and hail showers.
How windy? (On the summits)
North-northwesterly 30 to 40mph, stronger squally gusts at times nearer 50mph in showers.
Effect of the wind on you?
Significant wind chill over the mountains. Frequent buffeting affecting ease of walking and making balance challenging in exposure on tops and ridges.
How Wet?
Snow and hail showers most frequent north and western hills
A fairly widespread band of hill snow pushing southward before dawn. Then showers coming inland from northern coasts through the day, most frequent toward the west, with hail falling to lower slopes, rain only lower coastal areas.
Cloud on the hills?
Most frequent high tops in north
Often capping higher slopes above 700-900m, patches to 600m mainly on slopes toward coasts in showers. Brief breaks above higher tops, more often mid-Wales.
Chance of cloud free summits?
30% northwest, to 60% Bala group.
Sunshine and air clarity?
Brief bursts of sun. Visibility very poor where in snow and cloud, but intermittently very good.
How Cold? (at 900m)
-3C. Wind chill feeling like -12 to -15C on tops.
Freezing Level
400 to 500m. Soon widely dropping below freezing from valleys upward into evening.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 3rd January 2026
Last updated
Thu 1st Jan 26 at
4:00PM
How windy? (On the summits)
North to northwesterly 30 to 40mph, squally gusts in showers.
Effect of the wind on you?
Continued significant wind chill over the hills, severe highest tops. Frequent buffeting on exposed higher terrain.
How Wet?
Locally frequent snow and hail
Showers over the Irish Sea moving inland from the north, locally banding together to be more frequent, most likely affecting areas toward the Llyn Peninsula, snow and hail often falling to lower slopes.
Cloud on the hills?
Varied over northern tops
Often capping higher tops from Carneddau to Snowdon group, base varied above 700-900m, breaking at times off the tops. Brief lower patches in showers. More often clear southward into mid-Wales.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Bursts of sunshine, more often sunny inland toward mid-Wales. Visibility excellent where dry, but very poor where in snow and cloud.
How Cold? (at 900m)
-4 or -5C. Wind chill feeling like -17C in exposure on high tops.
Freezing Level
300 to 500m, highest near coast, but terrain part-frozen into valleys inland.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 4th January 2026
Last updated
Thu 1st Jan 26 at
4:00PM
How windy? (On the summits)
North to northwesterly 20-25mph, squally gusts in showers. Tending to strengthen later, 35mph over tops into night.
Effect of the wind on you?
Continued significant wind chill over the hills, severe highest tops. Ease of walking affected with buffeting, may deteriorate.
How Wet?
Snow and hail becoming frequent
Irish Sea showers move onto western slopes in the morning, gradually falling more widely into the Carneddau area and widely across Snowdonia NP. Fewer showers reaching Berwyn group and only later.
Cloud on the hills?
Increasingly shrouding high terrain
Capping higher tops from Carneddau to Snowdon group, base varied above 700-900m, a few higher breaks early. Bases lower in showers, and bases to middle slopes increasingly widely across Snowdonia NP.
Chance of cloud free summits?
50% lowering to 20%
Sunshine and air clarity?
Bursts of sunshine, mostly east, trending cloudier. Visibility excellent where dry, but increasingly very poor in snow and cloud.
How Cold? (at 900m)
-4C, though may start a degree cooler. Wind chill feeling like -17C in exposure on high tops.
Freezing Level
Terrain widely frozen down to valleys well inland; 300 to 400m near coastal slopes, highest towards the northwest.
Planning Outlook
Terrain extensively frozen this weekend and early next week; sub-zero temperatures from the glens upward in Scotland and some valleys inland in northern England. Substantial fresh snow accumulations in the North West Highlands and Cairngorms, heavy showers streaming in from the north also containing hail. Largely dry and sunny from central Scotland to northern England. Hail and snow showers will run into north and west Wales from the sea. Bitter northerly winds, up to gale force higher tops, lessening somewhat during Sunday. Some fluctuation of freezing level during next week, though most high terrain stays sub-zero, and as fronts come in from the west, upland snowfalls are possible more widely.