Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday'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
Monday 13th July 2026
Last updated
Sun 12th Jul 26 at
4:00PM
Summary for all mountain areas
Varied banks of cloud around hills in Scotland and Pennines early in the day, but increasingly dispersing during the morning to leave most or all hills clear. Strong sunshine, pleasant temperatures, warmest in western areas. Mostly light wind for the Highlands, gusty easterly further south. Very warm for Wales.
Headline for Eryri / Snowdonia National Park
Strong gusty wind; very warm, sunny, hills clear.
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?
Practically certain
Sunshine and air clarity?
Extensive sunshine. Good visibility, a light haze. High UV, beware sunburn, dehydration.
How Cold? (at 900m)
16C rising to 19C, (many 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
Sun 12th 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?
Little if any
Patchy cloud over some hills, Bala, Berwyn and Carneddau areas from dawn, above 500-600m; very highest tops may be just above cloud. Very little if any toward the west. Soon largely dispersing.
Chance of cloud free summits?
70% at first, soon practically certain
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 18C (valleys rising to 26 to 29C afternoon).
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 15th July 2026
Last updated
Sun 12th Jul 26 at
4:00PM
How windy? (On the summits)
Easterly 20 to 25mph, some gusty spots 35mph around higher mountains, passes and downslope to west in morning.
Effect of the wind on you?
Feeling breezy over the hills, gusty areas starting to affect comfortable walking and balance at times.
How Wet?
No rain expected
Cloud on the hills?
Little if any
From dawn, some patchy cloud around 500-600m mainly Berwyn to Bala hills, soon all thinning and dispersing.
Chance of cloud free summits?
Soon practically certain
Sunshine and air clarity?
Strong sunshine most of the day, some thin high cloud. Visibility excellent, some early haze.
How Cold? (at 900m)
15C from dawn (cooler on some eastern hills if in cloud), rising to 18C afternoon (valleys reaching
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 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 for 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. A cooling trend toward the weekend as north-northeasterly winds develop, a few showers possible, but a dry theme likely into early next week.