Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
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.
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.
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
Friday 8th August 2025
Last updated
Thu 7th Aug 25 at
4:00PM
Summary for all mountain areas
Gale-force winds persist over higher terrain in Scotland. Rain and drizzle throughout the day toward the northwest, low cloud covering western mountains extensively; higher cloud bases eastwards. Cloud banks common on hills near the Irish Sea, clearer with more sun eastwards over England & Wales.
Headline for Eryri / Snowdonia National Park
Breezy on hills. Generally dry, cloud lifting toward/above tops.
How windy? (On the summits)
West-southwesterly 20-25mph. Tending to increase into evening, in places 30-35mph on high tops.
Effect of the wind on you?
Feeling blustery, increasingly later affecting balance on exposed ridges. Feeling cool on tops.
How Wet?
Substantially dry
If any, only a few fleeting spots of rain drifting onto west-southwestern aspects
Cloud on the hills?
Lifting, some breaks off high tops
High tops shrouded from dawn with patches to 600-800m, lowest on aspects near Llyn Peninsula. Bases rising with breaks forming above highest summits, most clear hills around Ogwen valley and east.
Chance of cloud free summits?
40% rising to 70%
Sunshine and air clarity?
Sun increasingly frequent, particularly eastern low slopes; some early high cloud. Visibility limited somewhat by haze.
How Cold? (at 900m)
9 or 10C, rising a degree or two, most notably Ogwen Valley and north. Feeling near freezing in wind on tops.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 9th August 2025
Last updated
Thu 7th Aug 25 at
4:00PM
How windy? (On the summits)
Southwesterly 30 to 35mph, at times 40-45mph higher tops in Yr Wyddfa/Snowdon group.
Effect of the wind on you?
Strenuous walking on exposed higher terrain, balance challenging on tops and ridges. Marked wind chill.
How Wet?
A little rain occasionally
Some fine drizzle possible mainly west coastal slopes early in day. Some patchy light rain for an hour or so into afternoon, fading.
Cloud on the hills?
Varied patches
Early patchy cloud on coastal slopes clearing for a time. Lowering over tops in afternoon where rain occurs, then breaking again evening.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Patchwork of sun and cloud, thickening to cover sky for a time into afternoon. Visibility good, some distant haze.
How Cold? (at 900m)
9C. Feeling like -1 to -4C in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 10th August 2025
Last updated
Thu 7th Aug 25 at
4:00PM
How windy? (On the summits)
Southwest later southerly 5 to 15mph, strongest toward Llyn peninsula.
Effect of the wind on you?
Small
How Wet?
Rain not expected
Cloud on the hills?
Local patches clearing
Patches of cloud around some slopes toward west coast from dawn, high tops may start above cloud; lifting to then cap some tops for a few hours, breaking above most hills midday into afternoon.
Chance of cloud free summits?
60% rising to 90%
Sunshine and air clarity?
Mostly sunny. Visibility increasingly very good.
How Cold? (at 900m)
9C rising to 12C afternoon, may rise slightly higher evening onward.
Freezing Level
Above the summits
Planning Outlook
A mixed southwesterly weather pattern prevails. Often windy, especially Scotland. Fronts coming in from the Atlantic bringing periods of rain most frequently in west and northwest Scotland. Small amounts of rain reaching eastern Scotland, more often dry. Patchier and less frequent rain for western England and Wales - higher pressure building for periods to give drier and warmer weather here. Low cloud often shrouding western tops, sometimes to lower elevations near coasts, higher cloud bases eastwards with better breaks.