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.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra 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.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 6th June 2026
Last updated
Fri 5th Jun 26 at
4:30PM
Summary for all mountain areas
Patchy rain toward the south of the Highlands, and tends to become more persistent west coasts. Varied low cloud, higher breaks generally north. A swathe of rain and low cloud northern England and southern Scotland. Clusters of showery rain for Wales, heavy bursts with local thunder. Wind speeds varying.
Headline for Eryri / Snowdonia National Park
Windy, up to gale-force, brief lull. Showery bursts.
How windy? (On the summits)
South-southeasterly 40-50mph at dawn, powerful gusts risk 60mph at first, easing through morning to 20mph or less around noon, then turning westerly afternoon, rising again to 35-50mph later in day, soonest mid-Wales.
Effect of the wind on you?
Strenuous walking, balance challenging in places early in day, feeling distinctly chilly in exposure; a marked improvement to be fairly small middle of day for a few hours, but then later deteriorating again.
How Wet?
Heavy rain at first, then heavy showery bursts passing east
Rain fairly persistent from dawn, heavy in west for a couple of hours, fading to leave drizzly rain mid-morning, but then some further bursts of showery rain form, passing west to east into early afternoon, locally heavy, chance of isolated thunder. Tending to fade later, but leaving patchy light rain mainly western hills into evening.
Cloud on the hills?
Fairly extensive
Shrouding many hills much of day, especially more western areas, from low-mid slopes upward especially in rain, highest bases toward Carneddau if drier. A few fleeting breaks with higher bases here and there, more often late, but often covering western hills.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, mostly dull, poor visibility in rain, locally better if dry northern areas for a time; tending to improve below cloud later in west.
How Cold? (at 900m)
5C rising to 8 or 9C afternoon, then dropping again into evening. Feeling below freezing in the wind, around -5C early and late on high tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 7th June 2026
Last updated
Fri 5th Jun 26 at
4:30PM
How windy? (On the summits)
Southwesterly 30-40mph, strong gusts over tops to 45mph, possibly stronger.
Effect of the wind on you?
Walking strenuous, including lower slopes early, and often arduous over tops with considerable wind chill.
How Wet?
Drizzly rain west, may deteriorate
Some spotty rain drifting onto western slopes from time to time, perhaps a fine drizzle on high terrain in the early hours. Most areas substantially dry, but a risk of more frequent and heavier rain from mid-afternoon.
Cloud on the hills?
Clinging to high west slopes
May be fairly extensive from middle slopes up in the morning, to the lower slopes west of high terrain. Lifting, likely largely above 700m, perhaps clearing summits of Berwyn group and Carneddau, but highest summits will struggle to clear.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Weak sunshine through high cloud, increasingly patchy with time. Good visibility though a haze over the sea.
How Cold? (at 900m)
7 or 8C, may rise to 9C Carneddau. Feeling near or below freezing in strongest wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 8th June 2026
Last updated
Fri 5th Jun 26 at
4:30PM
How windy? (On the summits)
Southwesterly 15 to 25mph.
Effect of the wind on you?
Fairly small effect on walking, but feeling blustery and a noticeable chill on exposed high terrain.
How Wet?
Rain then odd showers
A band of rain clears eastward around dawn, briefly heavy. Then a scattering of showers, risk some more frequent in west later.
Cloud on the hills?
Often capping western tops
Varied cloud banks often over western tops above 800m, some lower patches in showers. Some breaks to tops more often north and east Carneddau to Bala.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Brief bursts of sun. Visibility good away from showers and below cloud.
How Cold? (at 900m)
4 or 5C. Feeling below freezing directly in the wind.
Freezing Level
Above the summits.
Planning Outlook
Generally unsettled next week - showers affect most hills Monday and Tuesday, lowest cloud and most persistent rain along western slopes, but with some breaks as well with sunshine. Risk of a deeper area of lower pressure from Wednesday or later bringing widespread strong winds, probably gales over many summits, with prolonged heavy rain. Temperatures trending milder again into next weekend, pressure may begin to rise in the south to give drier weather more widely with time.