Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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.
Bright sunshine
Beware of sunburn from bright spring sunshine, despite feeling cool in any breeze on higher terrain.
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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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.
Bright sunshine
Beware of sunburn from bright spring sunshine, despite feeling cool in any breeze on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 30th April 2026
Last updated
Wed 29th Apr 26 at
3:17PM
Summary for all mountain areas
Unbroken bright sunshine nearly everywhere - beware of dehydration and sunburn. Windy, particularly morning southern Scotland southwards where upland gales in some areas. SW Wales often cloudy with increasing threat of a shower.
Headline for Eryri / Snowdonia National Park
Bright sunshine most or all day. Strong gusty wind slowly easing.
How windy? (On the summits)
Southeasterly 40 to 50mph with powerful gusts early in day, tending to lessen gradually during day to 25 to locally 35mph.
Effect of the wind on you?
Challenging walking and difficult balance in gusty places in the morning, marked wind chill; tending to improve, but still blustery.
How Wet?
Rain very unlikely
Low risk of the odd burst of rain mid Wales toward dusk.
Cloud on the hills?
None expected
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Extensive or unbroken sunshine, some thin high cloud mainly toward southwest. Very good visibility, possibly slight haze.
How Cold? (at 900m)
8C rising to 11C afternoon. Feeling as cold as -5C in the wind early morning.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 1st May 2026
Last updated
Wed 29th Apr 26 at
3:17PM
How windy? (On the summits)
South-southeasterly, 15 to 20mph, occasionally 25mph, gusts mainly if showers occur.
Effect of the wind on you?
Fairly small.
How Wet?
Risk bursts of rain
Through day increasing risk isolated bursts of rain.
Cloud on the hills?
Little if any
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sunshine, becoming weak through a veil of high cloud, which will probably extend eastward. Visibility good or very good, but some haze.
How Cold? (at 900m)
10C, little change or even dropping a degree or so through day hills closest to west coast, but up to 14C afternoon easternmost hills.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 2nd May 2026
Last updated
Wed 29th Apr 26 at
3:17PM
How windy? (On the summits)
Generally southwesterly; 10 to 15mph.
Effect of the wind on you?
Small
How Wet?
Risk occasional rain
Largely or perhaps completely dry. However, risk pockets of drizzle in morning west Wales and increasingly showery rain later in day (low confidence in timing).
Cloud on the hills?
Very extensive from dawn; will gradually lift above most or all tops.
From dawn, cloud may be below 300m on slopes near the west coast, whilst elsewhere be extensive on higher slopes. A progressive improvement likely: most or all summits cloud free by afternoon - but patches reforming in rain.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Sunshine gradually coming through as low cloud lifts and breaks. Mostly very good visibility after a misty start.
How Cold? (at 900m)
7 to 12C, warmest east Wales in afternoon.
Freezing Level
Above the summits.
Planning Outlook
Less settled this weekend and into next week. Rain will not be extensive, but in some areas persistent for a few hours and some heavy, possibly thundery bursts - although particularly by Sunday local detail is as yet uncertain. Temperature levels will drop from the north, indeed early next week overnight and mornings higher slopes will be below freezing point Scottish Highlands, and further frosts are likely in valleys.