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.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
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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.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 5th November 2026
Last updated
Wed 4th Nov 26 at
12:15PM
Summary for all mountain areas
Extensive fog due to low cloud and patches of drizzle, but dry most western mountains where cloud base highest. Little wind N Scotland, but from near the central belt of Scotland southwards, blustery higher slopes, and in places very gusty west of major ridges.
Headline for Eryri / Snowdonia National Park
Gusty wind. Cloudy, risk drizzle. Extensive fog.
How windy? (On the summits)
Easterly 25 to on higher slopes 30 or 35mph, although sometimes 40, locally 45mph. Very gusty some lower slopes.
Effect of the wind on you?
Will impact ease of walking in places balance a struggle in gusty wind (including some lower slopes west of major ridges). Considerable wind chill.
How Wet?
Pockets of drizzly rain, mainly or only east Wales
A few, probably brief, patches of drizzly rain east Wales. Little if any west Wales.
Cloud on the hills?
Very extensive, though sometimes clearing western areas
Persistent fog above around 600-800m, although may occasionally break off higher summits. This unlikely east Wales and Carneddau, where risk patches at 300m in drizzle.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Extensively cloudy. Visibility very good although slight haze.
How Cold? (at 900m)
3C. In the wind will feel as cold as minus 6C.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 6th November 2026
Last updated
Wed 4th Nov 26 at
12:15PM
How windy? (On the summits)
Easterly, 15mph or in morning perhaps 20mph some higher areas Snowdon range. Will tend to ease through day.
Effect of the wind on you?
Fairly small
How Wet?
Little or no rain.
Most possibly all areas dry. But a little damp weather with pockets of very light rain will come and go across mainly east Wales and Carneddau
Cloud on the hills?
Extensive, particularly more eastern hills
Broadly, cloud base will rise westwards and through the day. Particularly in rain, pockets of or extensive cloud lower slopes east Wales, where base 450m or above by midday. Cloud mostly above 750m western hills.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Occasional sunshine, mainly west Wales. Good visibility, but misty in rain
How Cold? (at 900m)
2C
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 7th November 2026
Last updated
Wed 4th Nov 26 at
12:15PM
How windy? (On the summits)
Direction varied 10mph or less.
Effect of the wind on you?
Negligible
How Wet?
Patches of drizzly rain
Total rainfall small; nevertheless, particularly east Wales, drizzly rain may fall for an hour or two.
Cloud on the hills?
Extensive fog.
Low cloud will affect much of region above 200-400m, although westwards the cloud base will tend to be above 450 and higher areas will be between cloud layers.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Cloudy or dull. Hazy of foggy; misty in drizzle.
How Cold? (at 900m)
3C
Freezing Level
Above the summits.
Planning Outlook
High pressure will continue to be the main influence through the next week, particularly W & NW Highlands where extensively dry and wind often light. However, generally fog and low cloud may well never clear most mountains under the light wind. There will also be patches of drizzly rain, although total rainfall small.