Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Clear
Excellent or superb visibility, no navigation issues.
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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
Clear
Excellent or superb visibility, no navigation issues.
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 30th May 2026
Last updated
Fri 29th May 26 at
3:52PM
Summary for all mountain areas
Early patchy rain west Scotland, east hills dry and clear of cloud. Afternoon brings more substantial rain and cloud to west Scotland, spreading east with time; becoming blustery west too. Weak sun and clear hills England and Wales, mild-to-warm, notable breezes later for Eryri NP and Lakeland.
Headline for Eryri / Snowdonia National Park
Sun through high cloud and mild; blustery into evening
How windy? (On the summits)
Southwesterly 10-15mph through morning, sometimes lower speeds. Strengthening afternoon, sustained speeds of 20-25mph by evening and gusting 30mph.
Effect of the wind on you?
Small through morning, then increasingly affecting ease of walking, becoming strenuous on high terrain by evening and starting to feel chilly.
How Wet?
Rain unlikely until late
The hills likely stay dry until evening approaching when a few patches of rain may begin to drift in from the west, this continuing overnight.
Cloud on the hills?
Hills largely clear, odd patches west slopes
Some patchy cloud banks mostly hills near west coasts in morning, on middle or upper slopes, not necessarily over summits. Many hills start clear and early cloud likely substantially dissipates, only odd ragged patches west slopes if any.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Mostly sunny, though weakened by a veil of high cloud, perhaps occasionally thickening. Very good visibility.
How Cold? (at 900m)
9 or 10C, coolest Yr Wyddfa and westward; may reach 11C Carneddau and Berwyn groups. Later feeling near 0C on tops in wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 31st May 2026
Last updated
Fri 29th May 26 at
3:52PM
How windy? (On the summits)
Westerly 15-25mph, gusts to 30mph.
Effect of the wind on you?
Beginning to affect ease of walking, more strenuous conditions at times over high summits with a chilly feeling.
How Wet?
Light showers
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.
Cloud on the hills?
Lifting to just caps on high 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 over Snowdon and high west slopes.
Chance of cloud free summits?
Rising to 70%
Sunshine and air clarity?
Patchy sunshine. 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
Fri 29th May 26 at
3:52PM
How windy? (On the summits)
Southwesterly 20-30mph, likely gusty over tops and high passes, often to 35mph over Yr Wyddfa. Some risk of deteriorating.
Effect of the wind on you?
Walking impeded in exposure, buffeting gusts briefly affecting stability with a notable wind chill.
How Wet?
Rain setting in
Patchy rain from before dawn becomes frequent through morning, likely setting in persistently by the afternoon, heavy falls to the south and west. North areas may see longer dry weather, though this is uncertain.
Cloud on the hills?
Fairly 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 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 near freezing in direct wind.
Freezing Level
Above the summits.
Planning Outlook
Changeable southwesterlies prevail as the weekend transitions into next week. Sunday sees showers for west hill groups, more widely and sometimes heavy in Scotland. Monday brings more widespread rain and wind into England and Wales, showers continue in Scotland. An unsettled theme is expected during the first ten days of June. Frontal systems from the Atlantic bring periods of rain, wind, and low cloud. Wind speeds will vary, but reaching gale force on mountains for periods, England and Wales looking particularly vulnerable. A few brighter windows, but these brief and often interrupted by afternoon showers with a risk of local thunder. Sometimes chilly in Scotland when the wind turns northwesterly though staying above freezing to summits.