Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday'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.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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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.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 15th June 2026
Last updated
Sun 14th Jun 26 at
4:30PM
Summary for all mountain areas
A largely dry day for the Highlands, light winds inland and north, some sun, but a layer of cloud increasingly covers the sky from the south, later some rain moving into coastal areas. A little rain for northern England and Wales, locally risk of a heavier burst of rain forming. Gusty southerly winds particularly Wales.
Headline for Eryri / Snowdonia National Park
Gusty wind. A little rain, an odd shower. Patchy cloud.
How windy? (On the summits)
South-southeasterly 20-25mph, notable gusts early in day, and tending to rise to sustained 30mph for a time afternoon, again rather gusty; switching west-southwesterly from dusk.
Effect of the wind on you?
Walking becoming impeded on high terrain, some moments of strenuous walking during strongest gusts.
How Wet?
Some patchy rain, more often dry
A band of rain passes northeast through morning, variable amounts, locally a burst of rain possible, some hills may stay substantially dry. Afternoon onward is mostly dry, just a few light patchy falls possible. Some drizzle later west.
Cloud on the hills?
Caps may cling to high summits
Patchy banks of cloud early at various heights, mostly south/western slopes and many clear areas too. Bases lift to largely 900m and up, some breaks but caps around some tops. By evening, low cloud rolling in from southwest.
Chance of cloud free summits?
70%, lowering into evening
Sunshine and air clarity?
Often cloudy, a few glimpses of weak sun from time to time, mainly north. Variable visibility, sometimes good but hazier if in rain.
How Cold? (at 900m)
10 to 12C, becoming quite humid. Feeling cooler in exposure to the gusty wind, nearer 3C on tops.
Freezing Level
Well above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 16th June 2026
Last updated
Sun 14th Jun 26 at
4:30PM
How windy? (On the summits)
Southwesterly 15-20mph from dawn, strengthening to 30mph afternoon, later nearer 40mph at least in gusts.
Effect of the wind on you?
Fairly small at dawn, deteriorating to strenuous conditions, stability challenged over tops with considerable wind chill.
How Wet?
Patchy rain, later setting in
Patchy rain drifts from the southwest through morning, plenty of dry windows, but rain increasingly frequent afternoon, first towards mid-Wales, then more widely persistent across the west into evening.
Cloud on the hills?
Fairly extensive, some early breaks
High terrain shrouded from dawn, likely 500-600m upward; some morning periods of higher bases, any breaks to summits brief. Then more extensively shrouded afternoon from 400m up, higher bases north of the A5.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Mostly overcast, rare glimpses of weak sun early. Very good visibility below cloud, deteriorating later in rain.
How Cold? (at 900m)
10 or 11C. Feeling near freezing in strongest wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 17th June 2026
Last updated
Sun 14th Jun 26 at
4:30PM
How windy? (On the summits)
Southwesterly 25 to 35mph, gusty around higher tops, some passes, also downslopes to the northeast.
Effect of the wind on you?
Blustery over the hills, strenuous walking in exposure on higher slopes, starting to affect balance on some ridges.
How Wet?
Rain may persist, then fading
A mix of rain, drizzle and some showery moments; the most frequent rain typically western hills, risk persistently wet over several hours. Tending to fade through afternoon.
Cloud on the hills?
Extensive, some improvement afternoon
Blanket cloud across the hills around rain, from lower slopes upward toward Cardigan Bay and Llyn Peninsula, here may persist over tops all day. Lifting to 600m near & northeast of the A5, some breaks form higher in afternoon.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy, some sun may break through afternoon mainly north/east. Hazy much of day near west coast, misty widely around rain, then visibility improves afternoon, to be very good well inland.
How Cold? (at 900m)
10C, little change all day. Feeling near to freezing directly in wind.
Freezing Level
Above the summits.
Planning Outlook
A variable southwesterly will dominate through mid to late this week - windy at times with periods of rain, drizzle and low cloud most persistent in the west. Pressure generally trending higher from the south by the weekend, though into Saturday at least a damp westerly likely prevails into western Scotland. Warmest in England and Wales, but cooler in Scotland as low pressure to the northwest recycles air from the north Atlantic back onto the Munros. A window of drier and warmer weather is favoured into early the following week (22nd June), though a mixed Atlantic pattern may linger near to northwest Scotland in the longer range.