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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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 26th December 2025
Last updated
Thu 25th Dec 25 at
4:20PM
Summary for all mountain areas
Generally dry, apart from chance of odd light showers eastern Scotland. Sunshine over most Scottish mountains - the tops warmer than glens above an inversion; patchy low-level fog or cloud banks some slopes. Easterly winds remain strong and gusty England and Wales, feeling bitterly cold in exposure despite plenty of sun.
Headline for Eryri / Snowdonia National Park
Strong and gusty wind, feeling cold. Hills mostly clear with sun.
How windy? (On the summits)
Easterly 30 to 35mph, stronger gusts over 40mph around some tops and high passes; locally also gusty downslope west of high tops.
Effect of the wind on you?
Strenuous walking with significant wind chill in exposure over high terrain, in places buffeting gusts affecting balance, not just on highest terrain.
How Wet?
Dry all day
Cloud on the hills?
Little if any
Rare brief patches around some higher slopes above 700m, but most mountains generally free of cloud.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Mostly sunny, some thin patchy cloud. Visibility good, but distant slight haze.
How Cold? (at 900m)
0 or -1C, small variation with height. Feeling like -10 to -15C directly in the wind.
Freezing Level
Near freezing all elevations from dawn, staying mostly sub-zero above 600m, but above freezing some western slopes.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 27th December 2025
Last updated
Thu 25th Dec 25 at
4:20PM
How windy? (On the summits)
Easterly 30 to 40mph, very gusty around some tops, high passes and downslope toward the west.
Effect of the wind on you?
Affecting comfortable walking and balance over tops and ridges, sudden buffeting gusts in places; considerable wind chill.
How Wet?
Rare if any light rain
Largely dry; chance of an odd brief spot of light rain mainly eastern hills.
Cloud on the hills?
Mostly high tops toward north/east
Some cloud banks mostly above 700m and in areas from Carneddau to hills near Bala; patchier westwards, often clearing. Highest tops may be near top of cloud layer.
Chance of cloud free summits?
60% north/east, 80% near west coast.
Sunshine and air clarity?
Fairly cloudy, but some sun mainly toward west. Visibility very good.
How Cold? (at 900m)
1 to 3C, but slightly warmer on highest summits and some western slopes. Feeling like -10C directly in the wind.
Freezing Level
Some terrain partly frozen; close to freezing some upper slopes and patchy slight frost in sheltered valleys in morning.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 28th December 2025
Last updated
Thu 25th Dec 25 at
4:20PM
How windy? (On the summits)
Easterly 15 to 25mph, some stronger gusts possible around higher mountains.
Effect of the wind on you?
Fairly small, but noticeably blustery and gusty around exposed tops and ridges, giving marked wind chill.
How Wet?
Dry all day
Cloud on the hills?
Patches some upper slopes
Thin banks of cloud grazing higher slopes above 700m, mainly Carneddau and high tops near Bala, well broken westwards. Highest tops near or above this cloud.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Sun best toward west coast, broken cloud and sun elsewhere. Visibility very good, some distant haze.
How Cold? (at 900m)
0 or -1C. Feeling like -8C directly in the wind.
Freezing Level
Near or just below freezing above 700m, also frost some sheltered valleys in morning.
Planning Outlook
Dry weather continues into the weekend as a strong area of high pressure resides near or north of Scotland. Inversion conditions Scottish mountains, high tops generally above freezing and above most patchy cloud, some frost and fog in glens. Gusty east-northeasterly wind increasing for Scotland by Saturday, easing again for Sunday. Strong and gusty winds prevail for England and Wales, often cloudy, a little light rain occasionally Pennines; some sun toward west.