Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry, Inversion
Banks of cloud or fog on lower or middle slopes, but higher terrain likely clear and sunny above an inversion.
Hazy, some fog banks
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Hazy views with lack of air clarity, particularly on lower terrain, some fog banks on hills making navigation locally more difficult. If above an inversion, the air outstandingly clear.
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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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry, Inversion
Banks of cloud or fog on lower or middle slopes, but higher terrain likely clear and sunny above an inversion.
Hazy, some fog banks
Hazy views with lack of air clarity, particularly on lower terrain, some fog banks on hills making navigation locally more difficult. If above an inversion, the air outstandingly clear.
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
Wednesday 15th October 2025
Last updated
Tue 14th Oct 25 at
4:10PM
Summary for all mountain areas
High Scottish Highland tops remain above an inversion except in the far north; cloud becoming well broken in many areas. Variable morning cloud in England and Wales lifts to or off higher slopes with sun breaks. Highest Lakeland and Snowdonia tops at or above cloud tops. Feeling mild for most, an easterly breeze in Wales.
Headline for Eryri / Snowdonia National Park
High tops above cloud, most extensive east
How windy? (On the summits)
East-northeasterly 10-15mph. Gusty on higher hills, reaching up to 20mph or higher towards mid-Wales.
Effect of the wind on you?
Fairly small, though strongest gusts on southernmost hills starting to affect comfort of walking.
How Wet?
No rain expected
Cloud on the hills?
Highest tops above cloud, the layer most extensive east
From dawn, cloud banks at various heights, mostly below 700-800m and more extensive across Berwyn group - Snowdon likely above the cloud layer. Bases will lift to around 600-800m, well broken west of Snowdonia high terrain, only somewhat breaking east.
Chance of cloud free summits?
80% (highest summits above cloud)
Sunshine and air clarity?
Mostly sunny on high tops and western mountains of Snowdonia NP; some glimpses breaking out later in the east. Very hazy in the morning below the cloud layer, excellent visibility above.
How Cold? (at 900m)
8 or 9C, cooler in the valleys at dawn. May rise to 10C on highest tops above the inversion layer.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 16th October 2025
Last updated
Tue 14th Oct 25 at
4:10PM
How windy? (On the summits)
Direction variable through trending east-southeasterly 10mph or less. Some odd stronger gusts may blow.
Effect of the wind on you?
Small
How Wet?
No rain expected
Cloud on the hills?
Patchy cloud on east slopes
Patchy cloud at various low and middle heights towards east Wales, very little cloud on Snowdonia. Some cloud tending to form at upper elevations in the east as the day goes, though many slopes and highest tops often clear.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Often sunny west of high tops. Highest terrain possibly above cloud in very clear air, hazy lower down but improving.
How Cold? (at 900m)
6 to 8C. Starting cooler in the valleys, particularly west of high tops.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 17th October 2025
Last updated
Tue 14th Oct 25 at
4:10PM
How windy? (On the summits)
Generally southeasterly though variable, around 10mph. Rising towards 15mph around nightfall.
Effect of the wind on you?
Mostly small
How Wet?
No rain expected
Cloud on the hills?
Lifting to high terrain, some breaks
Banks of cloud on mid and upper slopes with patches lower down at dawn, some local valley mist possible. Cloud lifts to high terrain, breaking occasionally for clear summits.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Intermittent sunshine, some high cloud around. Good visibility though some haze.
How Cold? (at 900m)
6C
Freezing Level
Above the summits
Planning Outlook
High pressure weakens as the weekend approaches: varied low cloud and valley fog remain likely in the mornings, causing damp surfaces and slippery rock-faces. Cloud lifts higher during the day, starting to shroud mountain peaks more often, cooler temperatures returning to the high tops. Local cloud breaks, best of breaks in west Wales, though a haze will linger on low slopes of southern Scotland, England, and Wales - clearer air likely below the cloud in the Scottish Highlands. Light winds overall, an easterly breeze for Wales. The weekend sees a transition to low pressure. Winds will rise and more high cloud will reduce sunshine, rain then arriving late weekend and coming and going into the next week. Timing and location of rain uncertain for now.