Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Thursday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
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.
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.
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
Thursday 16th April 2026
Last updated
Wed 15th Apr 26 at
4:06PM
Summary for all mountain areas
Dawn gales over summits of south Scotland and north England, strongest wind moving north, but staying breezy in northern parts of England and Wales. Showers for many in the morning, soon easing with sun breaks, but remaining frequent with heavy bursts in west Scotland; some rain approaches Wales later afternoon.
Headline for Eryri / Snowdonia National Park
Often dry, though some drizzle and showers; blustery early
How windy? (On the summits)
Southwesterly 30-35mph at dawn, stronger pre-dawn, soon easing to largely 25-30mph, some variability both below and above this range.
Effect of the wind on you?
Strenuous walking with a chilly feeling at and before dawn, an easing trend, may become fairly small for periods, particularly sheltered slopes, but often quite blustery in exposure.
How Wet?
Drizzle, some light showers
Drizzly over high terrain much of morning, to some middle western slopes. Drizzle will tend to ease, but odd light showers will occur here and there through afternoon. As evening approaches, some rain returns from the southwest.
Cloud on the hills?
Lifting to just high terrain
Most terrain above 600m in cloud from before dawn, to 400m western slopes. Bases soon rising to mostly just caps on the high tops of Snowdonia NP by midday, with an increasing chance of summit breaks, a few moments of clear summits, but always a risk of returning, then more extensively returning to high terrain as evening approaches.
Chance of cloud free summits?
30% rising to 60%
Sunshine and air clarity?
Sunshine increasingly breaking out to a patchwork afternoon, slow to break in the west. A veil of high cloud builds through afternoon too. An early haze over the Irish Sea/Cardigan Bay in the distance, visibility becoming very good.
How Cold? (at 900m)
3 or 4C, rising a degree. Feeling as cold as -8C in early wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 17th April 2026
Last updated
Wed 15th Apr 26 at
4:06PM
How windy? (On the summits)
Southerly 30-40mph, soon shifting southwesterly, some variability, 45mph at times but an easing trend later.
Effect of the wind on you?
Strenuous walking most of the day, at times more arduous with significant wind chill; some improvement later.
How Wet?
Heavy rain for a few hours, easing
Patchy rain from dawn, setting in persistent and heavy for a time (perhaps only a few hours). Breaking into scattered showers from midday that will ease with time, though may be drizzly on high terrain for periods.
Cloud on the hills?
Extensive for several hours, increasingly broken afternoon
From dawn, cloud shrouds high terrain, variable lower banks, mostly towards Cardigan Bay and soon filling in more widely to middle slopes as rain sets in. Breaking afternoon as rain eases, though high summits struggle to clear. Bases always highest towards Carneddau.
Chance of cloud free summits?
10%, rising to 30%
Sunshine and air clarity?
Mostly cloudy, dull for several hours in rain with poor visibility. Glimpses of sun later with good visibility.
How Cold? (at 900m)
4 to 6C, some variability, but trending cooler, by several degrees overnight. Feeling like -5 to -7C in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 18th April 2026
Last updated
Wed 15th Apr 26 at
4:06PM
How windy? (On the summits)
Westerly 25mph, at times 30mph high tops, gusty in showers.
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 throughout the day, locally more frequent in west in morning, brief heavier bursts with hail.
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.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Brief bursts of sun, some sun more often toward coast later in day. Visibility varying, at times very good, but poor during showers.
How Cold? (at 900m)
3C, marginal rise into afternoon. Feeling like -4 to -7C directly in the wind.
Freezing Level
Above the summits.
Planning Outlook
Friday stays windy with a band of rain passing east across the British Isles. A settling trend begins on Saturday, showers lingering in western areas, then the most settled conditions of the weekend on Sunday. Light or even negligible wind by Sunday with cool-to-mild temperatures, though perhaps on the chillier side in Scotland. The stronger sunshine will feel mild despite chiller temperatures. More certainty regarding a dominance of high pressure next week: a mix of cloud and sun, often dry, and cool temperatures. Greatest chance of scattered showers in eastern areas, more cloud here, and some low fog in the mornings as well. Easterly wind at times quite blustery and gusty in England and Wales, generally lighter Scotland.