Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
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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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
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
Wednesday 15th July 2026
Last updated
Tue 14th Jul 26 at
4:28PM
Summary for all mountain areas
Warm across the hills with strong sunshine. Fog for lower eastern areas from dawn - Scottish hills above the fog, whilst low cloud banks drift onto hill slopes over Pennines for a few hours. Easterly breeze, strongest for south Pennines & Wales. Extremely dry ground, beware of fire.
Headline for Eryri / Snowdonia National Park
Warm and sunny. Gusty breeze.
How windy? (On the summits)
Easterly 20mph, some gusty spots 30mph around higher mountains, passes and downslope mainly to west of hills toward mid-Wales in morning.
Effect of the wind on you?
Feeling breezy over the hills, gusty areas occasionally starting to affect comfortable walking.
How Wet?
No rain expected
Cloud on the hills?
Early patches east clear; little if any west
From dawn, some patchy cloud around 500-600m mainly Berwyn to Bala hills, some high tops 600-700m upward above this cloud, soon all thinning and dispersing. Brief fragments in west, but largely clear.
Chance of cloud free summits?
50% at first furthest east, otherwise practically certain.
Sunshine and air clarity?
Strong sunshine most of the day, a little thin fair-weather cloud. Visibility excellent, some early haze.
How Cold? (at 900m)
16C from dawn (cooler on some eastern hills if in cloud), rising to 19C afternoon (valleys reaching 26 to 28C).
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 16th July 2026
Last updated
Tue 14th Jul 26 at
4:28PM
How windy? (On the summits)
Easterly, later northeasterly; 15-20mph, some gusty areas 25mph mainly early and late in the day.
Effect of the wind on you?
Fairly small, but some more noticeable gustier spots at times.
How Wet?
No rain expected
Cloud on the hills?
Hills clear
Any patchy cloud on easternmost hills at first soon dispersing.
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Sunshine over the hills dawn til dusk, occasional thin high cloud. Visibility excellent.
How Cold? (at 900m)
15C from dawn (warmer than valleys at first), rising to 18C (valleys reach 27C).
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 17th July 2026
Last updated
Tue 14th Jul 26 at
4:28PM
How windy? (On the summits)
North to northeasterly 10 to 20mph, strongest over tops in Snowdon/Yr Wyddfa area and on Llyn peninsula.
Effect of the wind on you?
Mostly small.
How Wet?
No rain expected
Cloud on the hills?
Hills clear
Chance of an odd patch of cloud drifting onto northern slopes.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Sunshine and thin high cloud. Visibility very good, slight low-level haze.
How Cold? (at 900m)
15C from dawn, small rise to 17C.
Freezing Level
Above the summits.
Planning Outlook
Settled summer weather continues into the weekend and next week as high pressure dominates. Warm temperatures on the hills in midweek will trend cooler from the north from Friday into the weekend, dropping below 10C on summits for periods, mainly Scottish mountains. Most persistently cooler in the north where some cloud will be drawn over the tops at times, occasional light showery rain. Otherwise generally ongoing dry weather, with good amounts of sun and many hill tops often clear of cloud. Continuing very high risk of fire with extremely dry ground conditions. A change of weather pattern late in the month brings scope for rain and thundery showers.