Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday'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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
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.
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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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
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.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 1st May 2026
Last updated
Thu 30th Apr 26 at
3:09PM
Summary for all mountain areas
As pressure falls slowly, so extensive high level cloud and bursts of rain (perhaps thundery in places later in day) will spread east - although the precise locations of the showery rain remains uncertain. Patches of low cloud, mainly near Irish Sea coasts will accompany the rain.
Headline for Eryri / Snowdonia National Park
Bursts of rain. Fairly light wind.
How windy? (On the summits)
Southerly, 10 to 15mph. Will increase to 20mph toward evening.
Effect of the wind on you?
Fairly small.
How Wet?
A few bursts of rain; heavy in places
Frequently dry, although one or two pulses of rain - ranging from a few spots to around an hour of locally heavy rain. Likely to clear from west in afternoon.
Cloud on the hills?
Forming during and for a while after rain; most widely SW Wales
Conditions may very markedly as for a few hours during and after rain, cloud forms widely above 500m, and locally from forest canopies up. Otherwise - at first and widely again by late afternoon - the hills cloud free.
Chance of cloud free summits?
40%- nearer 90% toward evening
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
Thu 30th Apr 26 at
3:09PM
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?
20% rising gradually north lakes to 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.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 3rd May 2026
Last updated
Thu 30th Apr 26 at
3:09PM
How windy? (On the summits)
Low confidence in forecast due to proximity of low centre. Wind direction varied, between 20 and possibly 35mph.
Effect of the wind on you?
Expect considerable wind chill, and even on some lower slopes significant buffeting in gusty wind.
How Wet?
Perhaps raining most of daylight
A broad band of rain may drift or clear only slowly northwards, - although as it clears, heavy showers could then develop.
Cloud on the hills?
Blanket of fog although some improvement through day
Fog enveloping the hills, sometimes from lower slopes, particularly on hills accessible from and northeast of the A5. As rain clears, so cloud base will rise, perhaps to 800 to 1000m, albeit patches reforming lower down near showers.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Patchy sunshine probably extending north. Visibility frequently poor in rain, but mostly very good by afternoon.
How Cold? (at 900m)
6C: may well feel as cold as minus 4C directly in the wind.
Freezing Level
Above the summits.
Planning Outlook
Less settled from the weekend onwards. Rain will be more frequent although apart from on Saturday night and Sunday (when a band of rain will move north about as far as central Scotland - the detail presently very uncertain) total rainfall will remain fairly small. Temperature levels will drop markedly, particularly on the Scottish Highlands, where overnight and mornings higher slopes will be below freezing point on Scottish Highlands - with hail and snow flurries. Overnight frosts may extend as far south as Wales again.