Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
Clear
Excellent or superb visibility, no navigation issues.
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.
Clear
Excellent or superb visibility, no navigation issues.
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
Saturday 14th November 2026
Last updated
Fri 13th Nov 26 at
2:12PM
Summary for all mountain areas
Windy across higher areas, particularly so those near the north Irish Sea and Scottish Highlands (where widespread upland gales). Drizzly rain will affect some western mountains, but otherwise extensively dry. Much mountain terrain at least partly frozen, particularly morning.
Headline for Eryri / Snowdonia National Park
Windy, particularly west; sunshine most areas. Terrain partly frozen.
How windy? (On the summits)
South or southwesterly between 25 and perhaps 35mph higher summits Snowdon area.
Effect of the wind on you?
Higher up considerable wind chill and strenuous walking and balance sometimes difficult - especially Snowdon to Tryfan and Carneddau.
How Wet?
Extensively dry although risk drizzly showers westernmost slopes.
Risk of a few light drizzly showers, or snow flurries higher slopes, Lleyn peninsula to western slopes of Snowdon.
Cloud on the hills?
Generally very little - may form or be extensive westernmost areas.
Risk Lleyn peninsula to western slopes of Snowdon of cloud frequently above 450 to 650m. Elsewhere, the hills extensively cloud free, although patches here and there on higher slopes.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Sunshine, most extensive. Hazy westernmost areas; otherwise visibility very good after fog some valleys morning.
How Cold? (at 900m)
0C tending to rise to 2C. Will feel as cold as minus 8C directly in the wind.
Freezing Level
700m rising toward or above highest summits. Frost valleys morning.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 15th November 2026
Last updated
Fri 13th Nov 26 at
2:12PM
How windy? (On the summits)
Still considerable uncertainty: Possible lull between southerly 20-30mph and later abruptly 30 to possibly 50mph.
Effect of the wind on you?
Temporarily small, but zones where wind chill significant and walking difficult - these challenging conditions could set in abruptly.
How Wet?
Periods of rain
Areas of rain will circulate within general low pressure, abruptly falling as snow on higher areas late in day.
Cloud on the hills?
Fog very likely across the mountains all day
Fog in some areas from lower slopes up, and few breaks above 600m. There may be an improvement as most cloud rises to above 750m.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Sunshine occasionally, most likely afternoon. Regions of very poor visibility - but often very good later in day.
How Cold? (at 900m)
3 to 5C, may abruptly drop toward 0C
Freezing Level
Above the summits. But threat change to freezing level of 950m later in day.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 16th November 2026
Last updated
Fri 13th Nov 26 at
2:12PM
How windy? (On the summits)
Westerly; dropping from 25-35mph at dawn to 10-20mph by dusk. Windiest more northern hills.
Effect of the wind on you?
Considerable wind chill and buffeting in gusty winds, mainly higher slopes in morning.
How Wet?
Snow/hail showers
Squally snow and hail showers, mainly morning. Rain below 350m.
Cloud on the hills?
Extensive higher areas, particularly west
Fog frequent, in morning rarely clearing above 750m, though may break off Berwyn mountains. By afternoon, cloud intermittently clearing all but perhaps highest summits (above 1000m). Near showers, plumes of cloud below 500m.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Intermittent sunshine; most sun mid Wales. Poor visibility in snow, but otherwise very good.
How Cold? (at 900m)
-2C. Will feel as cold as minus 12C directly in the wind.
Freezing Level
650m.
Planning Outlook
On Sunday, uncertainty in forecast detail remains within a complicated area of low pressure. Beyond, cold with higher terrain frequently or almost permanently frozen most or perhaps all next week. Wales, and perhaps N England, will see one or two incursions of much warmer air together with areas of persistent rain and snow. Some higher areas may have a considerable snow. Overall, low precipitation across Scotland, but marked exceptions: here too, where the frequently northerly wind rises over mountains (with the sea directly to the north), accumulations of snow may well be considerable.