Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
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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.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Very warm
Warm conditions across the hills, rising above 15C on tops. Increasingly hot on lower terrain, reaching 25C+ in many valleys. Beware of dehydration.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 12th July 2026
Last updated
Sat 11th Jul 26 at
4:00PM
Summary for all mountain areas
Cloud shrouds many hills in Scotland and NE England in the morning, more broken westwards; slowly tending to thin to leave patchier cloud on higher tops mainly eastern Scotland by afternoon. A notably strong gusty easterly wind for England & Wales, but mostly sunny. Warm for Wales & Peak District.
Headline for Eryri / Snowdonia National Park
Strong wind, gusty. Warm sunshine.
How windy? (On the summits)
Easterly 25 to 35mph, strongest in morning and quite gusty. Easing a little afternoon, mostly 20-30mph, but staying gusty, and tending to increase again during evening, to 30-35mph, risk gusts 40mph mid-Wales.
Effect of the wind on you?
Strenuous walking over tops at times, particularly early and late with buffeting gusts starting to affect stability over high terrain and especially exposed ridges.
How Wet?
No rain expected
Cloud on the hills?
Hills largely clear
Scattered ribbons of cloud at first on east Wales slopes between 500-800m, a few banks into Eryri/Snowdonia NP as well, but these soon thinning and dissipating.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Mostly sunny, some thin high cloud. Good visibility, a light haze. High UV, beware sunburn.
How Cold? (at 900m)
15 to 18C, tops warmer than some lower slopes at first; rising a degree or so warmer mid-Wales. (Valley temperatures reach 25 to 28C).
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 13th July 2026
Last updated
Sat 11th Jul 26 at
4:00PM
How windy? (On the summits)
Easterly 20-25mph. Quite gusty over tops, pushing downslope early with max speeds approaching 35mph at times.
Effect of the wind on you?
Comfort of walking affected on tops, more strenuous early with frequent nuisance gusts.
How Wet?
No rain expected
Cloud on the hills?
Likely none
A few ribbons of cloud affecting some middle slopes towards east Wales, these very sparse and soon thinning and dissipating for clear hills.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Extensive sunshine. Good visibility, a light haze.
How Cold? (at 900m)
16C rising to 19C, (western valleys approaching 27C); less humid than recent days.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 14th July 2026
Last updated
Sat 11th Jul 26 at
4:00PM
How windy? (On the summits)
Easterly 25mph, but some gusty spots 35mph around upper slopes, strongest speeds not necessarily on summits.
Effect of the wind on you?
Breezy over the hills, gusty areas making walking uncomfortable and affecting balance on ridges; feeling cooler.
How Wet?
No rain expected
Cloud on the hills?
Early cloud in east clearing
Cloud banks over some hills, Bala, Berwyn and Carneddau areas from dawn, mostly above 400-500m; very highest tops may be just above cloud. Patchy or very little toward the west. Soon largely dispersing.
Chance of cloud free summits?
50% east early, otherwise above 90%
Sunshine and air clarity?
Mostly sunny west, some patchy cloud in east early in day. Visibility largely very good.
How Cold? (at 900m)
12 to 15C from dawn, coolest if in cloud, rising to 17C (valleys rising to 25C or locally warmer afternoon).
Freezing Level
Above the summits.
Planning Outlook
A fine week of summer weather - warm and dry with pleasantly warm temperatures and often plenty of sunshine. High pressure north of the country keeps the skies mostly clear, some low-level cloud rolling inland from the North Sea at times. A prevailing easterly flow, pushing the warmest temperatures to western hill groups, valley temperatures often 25C, or warmer for Wales and Peak District, at times 30C. A fairly sustained breeze most of the week in England and Wales, at times stronger and quite gusty. Notably dry ground conditions, beware very high fire risk. Later in the week, an increasing risk of thundery showers forming, with a cooling trend into the weekend 18-19th.