Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
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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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 18th April 2026
Last updated
Fri 17th Apr 26 at
4:10PM
Summary for all mountain areas
Brisk westerly winds will give considerable chill factor over high terrain - air temperature near freezing on higher Scottish tops. Showery conditions - the most frequent precipitation in northwest Scotland in morning, falling as snow on Munros, also hail to lower levels. Showers become more scattered during afternoon.
Headline for Eryri / Snowdonia National Park
Blustery wind; showers, locally heavy with hail, fading from west.
How windy? (On the summits)
Westerly 25mph, at times 30mph high tops, gusty in showers. Trending northwesterly and easing somewhat afternoon.
Effect of the wind on you?
Feeling blustery over higher terrain, in places affecting ease of walking with noticeable wind chill in exposure on tops.
How Wet?
Showers, hail
Showery rain on and off, brief heavier bursts with hail, a local cluster of showers may move eastwards into afternoon. Some drizzle on summits in cloud between showers. Tending to fade in west coastal areas afternoon onward.
Cloud on the hills?
Varying over high tops, lifting
Patchy cloud over higher tops most common toward the west in the morning, likely to come and go above 700m for a few hours, briefly lower near coast at first; tending to lift with breaks to tops afternoon.
Chance of cloud free summits?
40% rising to 70%
Sunshine and air clarity?
Brief bursts of sun, some sun more often toward coast later in day. Visibility varying, at times very good, but briefly poor during showers.
How Cold? (at 900m)
2 or 3C, marginal rise into afternoon. Feeling like -5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 19th April 2026
Last updated
Fri 17th Apr 26 at
4:10PM
How windy? (On the summits)
Northerly 10 to 15mph, at times less.
Effect of the wind on you?
Small, but feeling chilly especially in the morning if exposed on tops.
How Wet?
Any precipitation unlikely
Cloud on the hills?
Mostly northern tops in morning
Patchy cloud mostly on northern slopes early morning, plus local mist some valleys at dawn. Patchy banks may linger on middle and upper slopes to the north for a time, but dissipating for cloud-free summits by afternoon.
Chance of cloud free summits?
50% north at dawn, rising to 80%
Sunshine and air clarity?
Mostly sunny, some thin high cloud around, and some fair weather cloud building afternoon. Excellent visibility.
How Cold? (at 900m)
1C from dawn, rising to 3 to 5C, mildest mid-Wales afternoon.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 20th April 2026
Last updated
Fri 17th Apr 26 at
4:10PM
How windy? (On the summits)
East or northeasterly, 15 to 20mph, some gusty areas.
Effect of the wind on you?
Fairly small effect on walking, but feeling rather chilly on exposed high tops.
How Wet?
Scattered showers
A few brief showers mainly toward north coastal areas in the morning, possible soft hail or a flurry of snow on higher slopes. Then a scattering of brief showers more widely afternoon, but locally often dry.
Cloud on the hills?
Capping some tops in morning, lifting
Patchy cloud banks mostly capping Carneddau above 700m in morning, occasionally drifting over higher Snowdon group for a time. Lifting higher up, leaving most cloud above hills afternoon.
Chance of cloud free summits?
60% rising to 90%
Sunshine and air clarity?
Patchwork of cloud and sun; best near west coast in the morning. Visibility often excellent, briefly reduced in showers.
How Cold? (at 900m)
0C rising to 3C afternoon. Where exposed to wind, feeling like -6C early in day, later -3C.
Freezing Level
Slight frost in valleys and close to freezing on highest tops above 900m from dawn. Rising above freezing to all tops.
Planning Outlook
High pressure expands over the British Isles on Sunday to bring a quieter day with lighter winds and only isolated showers. A scattering of showers on Monday as a cool east-northeasterly wind develops, but plenty of dry weather too. High pressure stays nearby to the north of Britain through the week ahead giving a run of dry days with sunshine typically best in the west, but many mountains often free of low cloud. A cool easterly wind is likely to prevail for England and Wales, strongest toward the south, whilst Scotland has often lighter winds. Some overnight frosts. Daytime temperatures near average, typically a few degrees above freezing on high tops through midweek.