Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday'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.
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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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.
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
Sunday 31st May 2026
Last updated
Sat 30th May 26 at
4:10PM
Summary for all mountain areas
Showers in Scotland, most frequent west where hill cloud will linger; clearer east, cloud caps around showers. Early showers and hill cloud England and Wales, cloud lifts to just passing caps Scafell and Yr Wyddfa, sun bursts breaking out and showers largely fade. Moderate breeze, occasional stronger gusts high tops.
Headline for Eryri / Snowdonia National Park
Light showers, early drizzle in cloud, fading; breezy high tops
How windy? (On the summits)
Westerly 15-25mph, some early stronger gusts, and perhaps a few afternoon hours of lighter speeds.
Effect of the wind on you?
Fairly small, though may be quite breezy on the high tops early in the day.
How Wet?
Light showers, some drizzle, easing
Scattered showers drifting from the west, mostly light in nature, a lingering fine drizzle on high west slopes in the morning. An easing trend afternoon to just nuisance drizzle on high west slopes.
Cloud on the hills?
Fairly extensive, lifting to just caps on highest tops
Fairly extensive above 600m early, to 300m west slopes of Yr Wyddfa and southward; nearer 700-800m Carneddau. Lifting and breaking, many hills clear by early afternoon, but a lingering bank of cloud above 800m on western slopes; Yr Wyddfa only seeing fleeting breaks until later.
Chance of cloud free summits?
Rising to 70%
Sunshine and air clarity?
Patchy sunshine, greatest chance of extended sunny breaks later in the day. Very good visibility but a building haze in the distance over the sea.
How Cold? (at 900m)
8 or 9C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 1st June 2026
Last updated
Sat 30th May 26 at
4:10PM
How windy? (On the summits)
Southwesterly 25-35mph, likely gusty over tops and high passes, to 40mph over Yr Wyddfa, or higher for a few hours.
Effect of the wind on you?
Walking strenuous in exposure, arduous for a time highest tops with notable wind chill; stability likely impacted.
How Wet?
Constant rain sets in
Patchy rain from before dawn soon becomes frequent, setting in persistently for several hours with extended falls in the south and west. May ease somewhat north and east later in the day, but any dry windows very short.
Cloud on the hills?
Extensive
From dawn, a deck of cloud shrouds western slopes from 400-500m up, locally lower; some higher breaks near Carneddau to start, possibly towards summits, but cloud fills in above 500-600m nearly all hills, always lowest bases west.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast and largely dull, particularly afternoon. Visibility poor due to low cloud but good at low heights.
How Cold? (at 900m)
9 or 10C, little change with height; may rise a degree. Feeling below freezing in strongest wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 2nd June 2026
Last updated
Sat 30th May 26 at
4:10PM
How windy? (On the summits)
Westerly 20 to 25mph, occasional 30mph at least in gusts on tops.
Effect of the wind on you?
Noticeable breeze, at times starting to affect balance on exposed ridges.
How Wet?
Heavy thundery showers, may fade
Showery rain on and off from dawn, some heavier bursts forming and passing eastwards morning into middle of day, risk isolated thunder. May fade for a time in west afternoon, some light showers later.
Cloud on the hills?
Lifting toward tops, breaks form
Cloud banks covering higher slopes most widely in west in morning, becoming confined above 800m and higher breaks into middle of day onward. Patches likely return over western tops into evening.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Glimpses of sun, may become sunnier near west coast for a time afternoon. Visibility very good, reduced in showers.
How Cold? (at 900m)
8 or 9C. Feeling close to 0C if exposed to wind.
Freezing Level
Above the summits.
Planning Outlook
An unsettled week ahead with low pressure facilitating periods of rain, showers, and a strengthening wind, as well as cooler temperatures. Rain spreads across most areas from the southwest on Monday, followed by showers on Tuesday, these showers perhaps turning into thunderstorms in central and east areas. The only settled window this week overnight into Wednesday, then more rain soon arrives from the west through Wednesday morning, spreading widely and with it gales likely over most hills as well except the far north of Scotland. Thursday and Friday remain showery and windy, nearly persistent rain and extensive low cloud northwest England and west Scotland, a few breaks in the east but showers always most widespread afternoon and even smaller hills seeing cloud over summits for periods.