Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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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.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 6th September 2026
Last updated
Sat 5th Sep 26 at
4:28PM
Summary for all mountain areas
Gales spread widely across Scotland, severe over high north and west tops. Drizzle over the Highlands, rainy early and late, wettest Northwest Highlands. Early showery rain over Wales passes into England, clearing northeast for sun through high cloud afternoon; windy here too. Warm, but feeling chilly in wind.
Headline for Eryri / Snowdonia National Park
Early showery rain, sun breaks out; windy, gale-force gusts
How windy? (On the summits)
South to southwesterly 30 to 45mph, very gusty in places, including downslope north of major summits, and may rise further for a few afternoon hours.
Effect of the wind on you?
Frequent buffeting across the hills, walking and balance challenging in places, not just on high terrain, and more widely for a few afternoon hours. Feeling cool in exposure despite warm air.
How Wet?
Soon largely dry
Morning showery rain passes to the northeast as midday approaches. A drizzle may linger, but this likely clears as well for a mostly dry afternoon. Around or after dusk, patchy rain returns from the west.
Cloud on the hills?
Mostly west coastal slopes in the morning
Varied low cloud, mostly towards Cardigan Bay, occasionally spreading more widely in the morning around rain. Little cloud expected through afternoon, just a few varied banks on high western slopes, only returning more widely late/into night.
Chance of cloud free summits?
40% rising to 80% afternoon.
Sunshine and air clarity?
Sun increasingly breaking out, fairly widely afternoon through weakened by high cloud. Generally good visibility but some haze.
How Cold? (at 900m)
12C, humid all day, rising to 14 or 15C, locally warmer northeast. Feeling like 5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 7th September 2026
Last updated
Sat 5th Sep 26 at
4:28PM
How windy? (On the summits)
Westerly 25 to 30mph, speeds rising and shifting southwesterly, sustained speeds of 40-45mph over tops later.
Effect of the wind on you?
A blustery starting, walking increasingly arduous, frequent buffeting in exposure. Considerable wind chill.
How Wet?
Early rain, then scattered showers
Rain from overnight may continue through dawn, but soon breaking up to leave only spotty showers for a time. Later, more frequent showery rain may return.
Cloud on the hills?
Lifting to tops, some breaks
Early varied cloud over the hills, lifting during morning to mostly patches over higher tops, breaks best Carneddau to Bala, more frequent above 700-800m west coast. Lowering patches in showers.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Glimpses of sun mainly northeast areas, increasing sun but through high cloud. A slight haze, particularly western hills, visibility reduced in rain.
How Cold? (at 900m)
7 or 8C, little change all day. Feeling like -2 to -5C in the wind on tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 8th September 2026
Last updated
Sat 5th Sep 26 at
4:28PM
How windy? (On the summits)
Westerly 30-40mph, some variable, but trending towards the higher end of the range later with stronger gusts.
Effect of the wind on you?
Strenuous walking in exposure, strongest gusts will challenge stability with considerable wind chill.
How Wet?
Showers
Showers come and go from the northwest through the day, generally on the lighter side, but a rising risk of more frequent showers with local heavy falls as the day goes.
Cloud on the hills?
Gradually lifting to mostly just summits
Blanket cloud over high terrain early, lowest bases to the west including to mid-Wales as low as 500m. A lifting trend with time, bases return lower during showers, but mostly around summit height later. May begin to lower again as night approahces.
Chance of cloud free summits?
Rising to 40%
Sunshine and air clarity?
A patchwork of sunshine, best on low eastern slopes. Good visibility though some haze near coasts.
How Cold? (at 900m)
7 or 8C. Feeling just below freezing in direct wind.
Freezing Level
Above the summits.
Planning Outlook
Generally unsettled onward into next week with spells of rain and showers moving in from the Atlantic, accompanied by frequently strong to gale force mountain winds. Temperatures will vary, mildest toward the south, but cooler air moves in from the north at times bringing higher Scottish tops occasionally close to freezing point. A few high pressure ridges will briefly bring brighter drier spells: Wednesday likely sees a brief good weather window, though cloud moves into the west with time, and indications suggest another window may arise Friday into Saturday, though this remains uncertain. Longer settled windows forming from mid-month, particularly England and Wales. Temperatures will be generally near or above average, best sunny windows around east hill groups.