Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday'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.
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 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.
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 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
Monday 27th April 2026
Last updated
Sun 26th Apr 26 at
3:58PM
Summary for all mountain areas
Morning showers and fog Scottish Highlands, showers trending eastward, heavier afternoon. Dry morning England and Wales, little hill cloud, then heavy afternoon showers, frequent and locally torrential over the Pennines with a risk of lightning. Little wind, but gusty around afternoon showers, deteriorating into night.
Headline for Eryri / Snowdonia National Park
Morning cloud lifts, some banks linger high north terrain
How windy? (On the summits)
Northerly 5-15mph; a northeasterly trend into evening, sustained speeds rising towards 20mph into evening.
Effect of the wind on you?
Fairly small most of the day, a nuisance breeze building on high terrain late in the day.
How Wet?
Likely dry
Small chance of a few light showers in south and eastern areas, but the hills likely stay dry.
Cloud on the hills?
Banks lingering on high northern slopes
Banks of cloud at various elevations from dawn, lifting to mostly above 700m, becoming well broken with summits breaks. Northern slopes and high tops of Snowdonia may continued to see banks come and go.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Often sunny, particularly low slopes; banks of cloud on high/northern slopes occasionally shroud the sun. Very good visibility, though an early haze.
How Cold? (at 900m)
7 or 8C. May rise slightly towards mid-Wales.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 28th April 2026
Last updated
Sun 26th Apr 26 at
3:58PM
How windy? (On the summits)
Northeasterly 20-25mph. Notable gusts, not just on high exposed terrain, approaching 40mph.
Effect of the wind on you?
Walking impeded in exposure most of the day, at times more strenuous with buffeting gusts and wind chill.
How Wet?
Scattered showers
Occasional showers, mostly light, and largely in east Wales. A few showers may drift further west.
Cloud on the hills?
Variable banks over summits
A layer of cloud above 600m early, most extensive eastern hills, this lifting through morning to just high terrain. Breaks off high summits are probable, but banks will return to summits at times too.
Chance of cloud free summits?
Rising to 70%
Sunshine and air clarity?
A patchwork of cloud and sun, best chance of extended sun breaks west. Excellent visibility.
How Cold? (at 900m)
4 or 5C most slopes, but may rise towards 7C western slopes towards Llyn Peninsula. Feeling like -5C in strongest wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 29th April 2026
Last updated
Sun 26th Apr 26 at
3:58PM
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?
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 frosts in sheltered valleys, mostly east Wales.
Planning Outlook
A core of high pressure lingers northeast of Scotland well into the week. The weather will be mostly sunny but also windy, particularly in Wales and the southern Pennines; challenging conditions are likely for several days on high Welsh mountains, powerful gusts over tops and downslope to the west requiring great effort to maintain stability. Despite Monday showers, dry ground conditions, warm temperatures, and wind bring a high risk of wildfire. More settled in Scotland, though breezy in the west, most hill cloud in the east. Detail becomes uncertain into next weekend, but a rising risk of showers and longer spells of rain as pressure begins to drop.