Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
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
Tuesday 27th October 2026
Last updated
Mon 26th Oct 26 at
1:57PM
Summary for all mountain areas
Continued strong upland wind particularly Scottish Highlands where storm force toward the north. Showers will come in from the west, falling one after another for periods on western mountains, particularly in Scotland. Cloud will shroud most mountains.
Headline for Eryri / Snowdonia National Park
Upland wind sometimes approaching gale force. Showers.
How windy? (On the summits)
Westerly, increasing markedly with height to 35, perhaps locally 40mph.
Effect of the wind on you?
Significant wind chill and strenuous or difficult walking where exposed. Balance sometimes a challenge on higher slopes.
How Wet?
Showers; some heavy
Showers; perhaps frequent at times morning. Fewer showers, but some heavy afternoon.
Cloud on the hills?
Persistently covering higher areas
Cloud base will vary; near rain patches around or below 450m, most extensive western mountains. Otherwise, by late morning, cloud base typically around 600m although 800m east Wales.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Occasional sun, mostly lower slopes. Visibility poor in rain; hazy at best.
How Cold? (at 900m)
4C. Feeling like -7C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 28th October 2026
Last updated
Mon 26th Oct 26 at
1:57PM
How windy? (On the summits)
Westerly 35mph at dawn; gradually easing to 25mph by mid afternoon.
Effect of the wind on you?
Strenuous walking from dawn, balance a challenge in exposure with considerable wind chill; effects lessening.
How Wet?
Rain and drizzle, mostly west early
Occasional showers, although for a couple of hours from dawn, the rain may be almost persistent in some areas (mainly west Wales).
Cloud on the hills?
Lifting to high terrain
May be fairly extensive around dawn, lifting and breaking up, areas around Carneddau first to see high breaks towards summits. Snowdon group and western slopes will be often covered above 800m, some variability and rising chance a few higher breaks with time.
Chance of cloud free summits?
20% rising to 40%
Sunshine and air clarity?
Sun increasingly breaking through, particularly east Wales. Hazy, best visibility east Wales.
How Cold? (at 900m)
7C. Feeling like -5C at first, wind chill effect lessening.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 29th October 2026
Last updated
Mon 26th Oct 26 at
1:57PM
How windy? (On the summits)
Southerly 15 or 20mph. May tend to strengthen through the day; possibly later 30mph westernmost areas.
Effect of the wind on you?
Small.
How Wet?
Risk fine drizzle in cloud.
Largely or completely dry, but perhaps fine drizzle in cloud south lakes.
Cloud on the hills?
Extensive, in places from valleys up.
Very mixed. Some summits may clear at least temporarily, or even be free of fog all day (perhaps above fog lower down). But overall, extensive persistent fog from some valleys up manly in east Wales.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Widely dull and misty east Wales - patches of fog from some valleys upward. Elsewhere, varied, some areas sunny with good visibility, both in valleys and on the hills.
How Cold? (at 900m)
6C.
Freezing Level
Above the summits
Planning Outlook
A hint of a change as pressure builds across Britain from the coming weekend. For this week though, although not as stormy, further bands of rain and strong wind, particularly affecting western mountains. Into the weekend, a final front could well become almost stationary for a day or so before fizzling out - as yet uncertainty as to its position (thus its rain and low cloud) in the otherwise improving picture as it becomes fine with light wind on the hills.