Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
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.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
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.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 23rd May 2026
Last updated
Fri 22nd May 26 at
3:08PM
Summary for all mountain areas
Scotland: Gusty south-westerly will feed extensive low cloud and patchy drizzle into the west. Mostly dry for eastern hills where cloud will lift and break off the hills. England and Wales: Low cloud and local drizzle morning western hills, mainly coasts, but burning off to leave warm sunshine widely.
Headline for Eryri / Snowdonia National Park
Early low cloud or mist disperses. Then sunny and increasingly warm. Light winds.
How windy? (On the summits)
West-southwesterly 10-15mph, some variability and occasional stronger gusts.
Effect of the wind on you?
Fairly small but nuisance gusts much of the day over tops and elevated passes.
How Wet?
Likely dry
Chance of some early fine drizzle over Yr Wyddfa/Snowdon, perhaps some high western aspects further south, this fading through morning for dry hills.
Cloud on the hills?
Early low cloud west, most hills clearing
Low fog on western slopes at dawn, largely below 700m (chance high tops above a layer of cloud, but uncertain). Cloud rises and breaks, hills mostly clear by afternoon, perhaps odd banks west slopes at times. East Wales/Carneddau sees little cloud all day.
Chance of cloud free summits?
Rising to 80%
Sunshine and air clarity?
Mostly sunny, some patchy higher cloud at times. Very good visibility.
How Cold? (at 900m)
10C rising to 13C (to a warm 22C east valleys). Staying elevated into night; little change with height.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 24th May 2026
Last updated
Fri 22nd May 26 at
3:08PM
How windy? (On the summits)
South to south-westerly 10 to 15mph
Effect of the wind on you?
Mostly negligible
How Wet?
Dry
Cloud on the hills?
Mountains clear
Aside from some patches of banks across coastal hills early in morning, which will burn off, hills are expected to be clear.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Extensive sunshine coming through. Very good visibility.
How Cold? (at 900m)
12C lifting to 16C, warm
Freezing Level
Well above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 25th May 2026
Last updated
Fri 22nd May 26 at
3:08PM
How windy? (On the summits)
South to south-westerly 10mph.
Effect of the wind on you?
Small
How Wet?
Dry
Cloud on the hills?
Mountains clear
Any early mist will soon disperse to leave the mountains clear.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Widespread and strong sunshine. Good visibility, but slight haze.
How Cold? (at 900m)
18C, humid
Freezing Level
Well above the summits. Valley temperatures inland reaching high 20s. Cooling sea breezes for coastal hills.
Planning Outlook
Pressure builds this weekend, centred over England and Wales where it will be warm and sunny. To the north of the high, a blustery and gusty south-westerly will persist across the Highlands with patchy rain and hill fog,mainly in the west and northwest. Very warm by Sunday and Monday valleys of Wales and England, mid to high 20s. Low 20s glens into southern and eastern Scotland. Next week, high pressure extends over Scotland, cutting of the low cloud and drizzle from northwest Scotland by midweek with warm sunny weather, cooler in the north and east coat. Still very warm into the valleys of England and Wales with extensive sunshine.