Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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 8 to 12C 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 8 to 12C 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
Tuesday 22nd July 2025
Last updated
Mon 21st Jul 25 at
4:29PM
Summary for all mountain areas
Drizzly and dull for west Scotland, rain and cloud increasingly breaking in the east with some breaks to tops. Patchy rain and morning fog across most of England and Wales too, cloud tending to lift though most tops likely remain in cloud. Cloud and drizzle will linger on west slopes of Lakeland and Wales.
Headline for Eryri / Snowdonia National Park
Fog and rain/drizzle, tending to improve east
How windy? (On the summits)
Northwesterly, at times backing westerly, 15-20mph. Trending northerly as night falls.
Effect of the wind on you?
Fairly small, occasional uncomfortable gusts over high tops. Feeling cool.
How Wet?
Rain and showery bursts, drizzle over high ground
Showery rain for a time, most frequent before noon. Smaller amounts further inland into mid-Wales in morning. Drizzle will linger on high tops much of the day. Becoming substantially dry into evening.
Cloud on the hills?
Extensive, tending to rise
Shrouding the hills widely in the morning, bases 400-600m, lowest near to coasts. Rising somewhat with time and some breaks forming east Wales, though most terrain above 800m staying in cloud.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Little or no sun. Visibility good below cloud, but reduced at times during rain.
How Cold? (at 900m)
9 or 10C, small change all day. Feeling like 3 to 5C in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 23rd July 2025
Last updated
Mon 21st Jul 25 at
4:29PM
How windy? (On the summits)
Northwesterly 15-20mph. Shifting northerly and rising towards 25-30mph into evening..
Effect of the wind on you?
Fairly small, walking becoming inconvenienced as evening approaches.
How Wet?
Rain north and east breaks into spots
Drizzly rain in the morning on north and western slopes. Tending to fade, though high tops remain in drizzle for a time. Occasional spots of light rain drifting around.
Cloud on the hills?
Tending to improve, high tops stay in cloud
Cloud fairly extensive above 700-800m at dawn, lower on slopes nearest to Anglesey. Bases tending to lift, but high tops likely remaining mostly shrouded. Slopes southeast of highest tops will substantially clear.
Chance of cloud free summits?
10% rising to 30%
Sunshine and air clarity?
Mostly cloudy, patchy sun breaking out for a time through the midday hours. Excellent visibility.
How Cold? (at 900m)
9 or 10C, little change all day.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 24th July 2025
Last updated
Mon 21st Jul 25 at
4:29PM
How windy? (On the summits)
North to northwesterly 10-15mph. Notable gusts over tops may rise to 20mph.
Effect of the wind on you?
Fairly small, some light buffeting in gusts over high tops.
How Wet?
Little or no rain
Some fine drizzle around where in cloud in the morning, chance of local spots of light rain east Wales later. Otherwise dry.
Cloud on the hills?
Shrouding tops, drifting down northwest slopes
From dawn, fog fairly extensive from middle slopes up, reaching lower slopes facing Anglesey. Tending to rise, though high terrain 900m and up likely remains in cloud most of the day with bases drifting down northwest slopes.
Chance of cloud free summits?
20%; rising to 60% east Wales
Sunshine and air clarity?
Patchy sun becomes more frequent east Wales. Excellent visibility.
How Cold? (at 900m)
9 or 10C, warming only slightly if at all.
Freezing Level
Above the summits
Planning Outlook
High pressure slowly begins building on Wednesday, beginning a settling trend from the west. Some heavy rain in eastern areas will ease away on Thursday with only spotty showers remaining. Into the weekend, weather will notably settle with increasing sun across England and Wales with decent sunny spells in east Scotland. A predominantly west-southwesterly breeze will facilitate cloud and occasional rain patches into west Scotland. A changeable outlook through late July with rain affecting all areas at times, most frequent in western Scotland, some settled periods too. Often breezy with near average temperatures.