Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Winter sunshine
Bright and crisp with sunshine most of the day and the mountains generally free of cloud.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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.
Winter sunshine
Bright and crisp with sunshine most of the day and the mountains generally free of cloud.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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
Thursday 12th November 2026
Last updated
Wed 11th Nov 26 at
12:26PM
Summary for all mountain areas
Low freezing level in briefly very cold northerly wind: widely gale force Scottish Highlands. A little less windy south into N England and Wales. Hail and snow showers northern and coastal NW Highlands, a few flurries elsewhere, albeit much of upland Britain fine and sunny.
Headline for Eryri / Snowdonia National Park
Blustery; considerable wind chill. Sunshine - particularly south of Snowdon.
How windy? (On the summits)
Northerly 25mph.
Effect of the wind on you?
Mostly fairly small, but notable wind chill.
How Wet?
Showers in north for a time
Occasional brief showers drifting onto coastal hills from the north in the morning, snow flurries above 600m.
Cloud on the hills?
Grazing tops Snowdon, Tryfan and Carneddau at times
Occasional patches cap higher slopes north from Snowdon mainly morning.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Mostly sunny, patchy cloud Snowdon range, particularly Carneddau. Visibility mostly excellent.
How Cold? (at 900m)
-1C. Feeling like -10C directly in the wind.
Freezing Level
800m, or slightly higher near coast. Also frost many inland valleys in morning.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 13th November 2026
Last updated
Wed 11th Nov 26 at
12:26PM
How windy? (On the summits)
Northwesterly, 15mph or likely dropping less during the day.
Effect of the wind on you?
Mostly small.
How Wet?
Substantially dry
Chance of an odd light shower drifting onto coastal areas near Llyn peninsula.
Cloud on the hills?
Mostly little if any
Some patchy cloud occasionally drifting onto upper slopes of Carneddau and Snowdon group, but often clearing. Very little if any cloud further south and east.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Mostly sunny, some patchy cloud near to coasts in northwest. Visibility excellent.
How Cold? (at 900m)
0 or -1C.
Freezing Level
Around 800-900m, but frost widely in valleys in morning, in places all day inland out of sunlight.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 14th November 2026
Last updated
Wed 11th Nov 26 at
12:26PM
How windy? (On the summits)
South or southwesterly between 15 and perhaps 25mph.
Effect of the wind on you?
Fairly small, although notable wind chill where exposed.
How Wet?
Extensively dry although risk showers.
A few drizzly showers, probably only western slopes of Snowdon range - giving a little sleet of snow higher slopes morning.
Cloud on the hills?
Mostly confined to higher slopes
Risk Lleyn peninsula to western slopes of Snowdon of cloud frequently above 450 to 650m. Elsewhere, some uncertainty: the hills may be cloud free, but anticipate patches coming and going above 900m,
Chance of cloud free summits?
60%
Sunshine and air clarity?
Sunshine, perhaps extensive. Hazy westernmost areas; otherwise visibility very good after fog some valleys morning.
How Cold? (at 900m)
0 or -1C tending to rise to 1C. Will feel as cold as minus 6C directly in the wind.
Freezing Level
700m rising toward or above highest summits. Frost valleys morning.
Planning Outlook
The present extensively dry and often relatively windless weather will end over the next few days as low pressure envelopes Britain. Showery conditions (snow on higher areas) will arrive on western mountains (mainly W & NW Scotland) on Saturday, before the threat of widespread rain - or snow higher areas of the Highlands - on Sunday. There may also be upland gales (although as yet considerable uncertainty for Sunday). Next week, frequent precipitation, low cloud and bouts of upland gales.