Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday's Forecast
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.
Click an icon for more information or click here for a key to all icons.
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
Friday 13th November 2026
Last updated
Thu 12th Nov 26 at
12:05PM
Summary for all mountain areas
Under high pressure most mountain areas fine with sunshine. However, progressively north across Scotland, increasing strong westerly wind will bring snow showers to mainly the NW Highlands and low cloud across western mountains. Much terrain frozen - but freezing level rising through day.
Headline for Eryri / Snowdonia National Park
Much terrain frozen - before slow thaw. Periods of sun.
How windy? (On the summits)
Northwesterly 15mph at first easing to less than 10mph
Effect of the wind on you?
Negligible
How Wet?
Precipitation very unlikely
Very low risk of a light shower Snowdon range.
Cloud on the hills?
May shroud higher tops Snowdon range
Increasingly cloud drifting onto tops in Snowdon range above 800m - though it may be afternoon before the cloud forms.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Mostly sunny, although cloud may form increasingly from northwest onto the Snowdon range. Visibility excellent.
How Cold? (at 900m)
-1C rising to 1C.
Freezing Level
Terrain nearly all frozen morning, but slowly a thaw will set in from west as freezing level drifts up toward 1000m.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 14th November 2026
Last updated
Thu 12th Nov 26 at
12:05PM
How windy? (On the summits)
South or southwesterly between 25 and perhaps 35mph higher summits Snowdon area.
Effect of the wind on you?
Fairly small, although notable wind chill where exposed and in the Snowdon area there may well be considerable buffeting.
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.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 15th November 2026
Last updated
Thu 12th Nov 26 at
12:05PM
How windy? (On the summits)
Very low confidence near centres of low pressure: Varied direction, possible marked lull but anticipate up to 45mph.
Effect of the wind on you?
Sometimes 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, perhaps falling as snow on higher tops 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.
Planning Outlook
Pressure will fall over the weekend: a little rain for some western mountains on Saturday, but more widespread rain (snow higher areas Scottish Highlands) on Sunday - albeit the detail for Sunday is unusually uncertain (for a 3 day forecast). Cold often dry conditions will return on Monday, but beyond extensive rain (sometimes snow higher areas) and strong winds probable, although presently Scotland, particularly the Highlands may have only snow showers in the cold air.