Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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
Sunday 6th July 2025
Last updated
Sat 5th Jul 25 at
4:29PM
Summary for all mountain areas
Cloud on higher hills with patchy rain for many areas in the morning. Later, a band of showers forms from central highlands southward into England, drifting down the Pennines; showers will give heavy bursts with a risk of few lightning flashes southern Scotland. Damp in Wales early, gradually improving.
Headline for Eryri / Snowdonia National Park
Early rain into drizzly showers, cloud base tending to lift
How windy? (On the summits)
West to northwesterly 25-30mph; westerly early in the day. Increasing through the afternoon, winds approaching 35-40mph over tops into nighttime.
Effect of the wind on you?
Walking impeded most of the day, becoming strenuous with buffeting gusts challenging balance on exposed ridges into evening. Feeling cool.
How Wet?
Showers, at times persistent
Often raining early with heavy spots here and there, then drizzly rain much of the day on northwest slopes facing Anglesey. Generally easing through the day, though at times drizzly and damp on high slopes.
Cloud on the hills?
Fairly extensive, some improvement; best breaks southeast
Fairly extensive over high terrain much of the day. North and west slopes nearest Anglesey regularly shrouded to middle slopes. Bases tend to rise, tops southeast of Glyder Fawr/Snowdon increasingly clear.
Chance of cloud free summits?
20%, becoming 70% southeast
Sunshine and air clarity?
Greatest chance of glimpses southeast of high tops. Good visibility out of cloud, often poor in rain on north/west slopes.
How Cold? (at 900m)
8 or 9C, little change through the day. Feeling at/near freezing in the wind, notably into nighttime.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 7th July 2025
Last updated
Sat 5th Jul 25 at
4:29PM
How windy? (On the summits)
Northwesterly 25-35mph, risk up to 40mph at dawn. Notable gusts over high tops and down south/eastern slopes.
Effect of the wind on you?
Walking impeded in strongest wind, buffeting gusts may challenge stability in exposure. Feeling cool.
How Wet?
Morning showery bursts
Several showery bursts in the morning, greatest chance east; risk briefly heavy. Fading to substantially dry conditions.
Cloud on the hills?
Lifting, largely clearing summits
Fairly persistent over high tops from dawn, banks drifting down north and west slopes somewhat; east and south slopes substantially clear. Gradually lifting to clear summits though cloud caps may occasionally drift over highest tops later.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Patchy sun becoming fairly extensive. Very good visibility through some haze.
How Cold? (at 900m)
6C rising to 8C. Feeling just above freezing in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 8th July 2025
Last updated
Sat 5th Jul 25 at
4:29PM
How windy? (On the summits)
North to northwesterly 20-25mph early, easing to 15-20mph, though gusty over tops.
Effect of the wind on you?
Fairly small much of the day, some uncomfortable wind in the morning.
How Wet?
Little or no rain
Small chance local spots of drizzly rain late in the day. May be entirely dry.
Cloud on the hills?
Patchy morning cloud largely clears tops
Patchy cloud drifts over high terrain early, banks occasionally pushing down slopes towards Anglesey. Lifting through morning, largely clearing summits, though always a chance of fleeing cloud caps over highest tops.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Fairly extensive morning sunshine, high cloud building through afternoon. Very good visibility though some haze.
How Cold? (at 900m)
6 or 7C, rising to 8C, further rising into night towards 10C.
Freezing Level
Above the summits
Planning Outlook
A generally settled start to the week as high pressure will become dominant across England and Wales Monday and Tuesday. Expect substantially dry conditions here through much of the week with good periods of sunshine. In Scotland, low pressure to the north will facilitate a consistent west-southwesterly wind, driving several weak fronts onto northwestern coasts as the week goes - often cloudy here with periods of rain, tending to be drier with sunny spells in east Scotland. Temperatures will be near average. Some uncertainty about next weekend - fronts are likely to continue drifting towards Scotland and north England, though possibly interrupted by dry and warm air from the continent.