Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate 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.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 28th April 2026
Last updated
Mon 27th Apr 26 at
4:00PM
Summary for all mountain areas
Dry with light winds, variable cloud and sun for much of the Highlands, though central-southeastern areas start with low cloud more widely over hills, tending to thin and break. England and particularly Wales will have gusty easterly winds; low cloud fairly widely in morning with local drizzly showers, improving.
Headline for Eryri / Snowdonia National Park
Strong gusty wind. Low cloud in east in morning, largely dry.
How windy? (On the summits)
Northeasterly 25mph. Notable gusts, not just on high exposed terrain, approaching 40mph, tending to increase a little further up to dusk.
Effect of the wind on you?
Walking impeded in exposure all day, at times more strenuous with buffeting gusts around tops, through passes and locally downslope. Considerable wind chill.
How Wet?
Early drizzly showers mostly east
Occasional light showers, mostly drizzly, and largely in east Wales. A few brief showers may drift further west, fading through middle of day to be dry.
Cloud on the hills?
Variable banks over summits, lifting
A layer of cloud above 600-700m early morning, most extensive eastern hills, higher breaks westwards. Gradually lifting, mostly just banks drifting over high tops by early afternoon, increasingly clearing.
Chance of cloud free summits?
30% in morning, 50% near west coast; rising widely to 80% by mid-afternoon.
Sunshine and air clarity?
Largely cloudy morning, dull eastern areas, some sun mainly in west. Patchwork of sun breaking through, then increasingly widely sunny late afternoon. Very good visibility.
How Cold? (at 900m)
3C rising to 5C, locally up to 7C western slopes towards Llyn Peninsula. Feeling like -5 to -8C in strongest wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 29th April 2026
Last updated
Mon 27th Apr 26 at
4:00PM
How windy? (On the summits)
Easterly 35-45mph; powerful gusts over tops and downslope to the west, approaching 55mph to lower slopes.
Effect of the wind on you?
Arduous walking with notable wind chill despite mild temperatures; strongest gusts necessitate significant effort for balance.
How Wet?
No rain expected
Cloud on the hills?
None expected
Some patchy mist in sheltered valleys of east Wales at dawn, this soon dissipating for cloud-free hills.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Widely sunny. Very good visibility.
How Cold? (at 900m)
7 or 8C. Feeling as cold as -5C in strongest wind.
Freezing Level
Above the summits. Patchy frost at dawn in sheltered valleys, mostly east Wales.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 30th April 2026
Last updated
Mon 27th Apr 26 at
4:00PM
How windy? (On the summits)
Southeasterly 35 to 50mph with powerful gusts early in day, tending to lessen gradually during day toward 25mph.
Effect of the wind on you?
Challenging walking and difficult balance in gusty places in the morning, marked wind chill; tending to improve, but still blustery.
How Wet?
No rain expected
Cloud on the hills?
None expected
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Extensive sunshine, some thin high cloud mainly toward southwest. Very good visibility, possibly slight haze.
How Cold? (at 900m)
7C rising to 11C afternoon. Feeling as cold as -5C in the wind early morning.
Freezing Level
Above the summits. Slight frost sheltered valleys at dawn.
Planning Outlook
High pressure brings settled weather and lots of spring sunshine through midweek, warm days with high UV; cool nights with grass frost in sheltered spots. Strong and gusty easterly winds will prevail for England, Wales and southern Scotland, whilst southeasterlies also tend to increase further across the Highlands by Thursday. Very dry grass and moorland conditions over mountain terrain continues to present a very high fire risk. A shift toward lower pressure by the end of the week brings a likelihood of showers on Friday, locally heavy. Southwesterly winds are then likely into the Bank Holiday weekend - cooler with a mix of sunny spells and showers in the extended forecast; very highest Scottish summits may dip close to freezing point.