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.
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 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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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 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 23rd September 2026
Last updated
Tue 22nd Sep 26 at
4:28PM
Summary for all mountain areas
Rain and strong winds soon clears east from Scotland, but lasts a few hours over northern England and Wales in the morning with some heavier bursts. A marked improvement follows as cloud lifts and breaks up. A few showers continue near west coasts of Scotland. Feeling rather chilly in a fresh breeze.
Headline for Eryri / Snowdonia National Park
Blustery, some heavy rain, improving to sunshine and clear hills.
How windy? (On the summits)
Westerly 25 to 35mph from dawn into early morning and briefly very gusty. Soon turning northwesterly, lessening to 20-25mph, then gradually lower during afternoon. Dropping to very little wind onward into night.
Effect of the wind on you?
Blustery in morning with briefly powerful buffeting gusts, moderating but staying breezy and feeling increasingly rather cool in exposure; an improving trend.
How Wet?
Morning rain, clearing afternoon
Drizzly on high terrain in the early hours, patchy rain by dawn soon becomes frequent for a few hours, some heavier bursts for a time in morning. Into middle of day, rain quickly clears away to the east to become largely dry, brief residual showers fade.
Cloud on the hills?
Fairly extensive morning, well-clearing
Most terrain above 600m shrouded much of morning, a few breaks but also more extensive for a time with ragged patches to forest canopies. Through afternoon, cloud lifts, and breaks up, just banks above 800m into evening, mostly towards Anglesey.
Chance of cloud free summits?
20%, rising to 70% through afternoon
Sunshine and air clarity?
Glimpses of sun, breaking out afternoon, mostly sunny by late in the day. Visibility poor for a time, then becomes excellent as rain breaks.
How Cold? (at 900m)
10C through morning, then cooling, to finish near 7C. Feeling just above 0C in strongest wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 24th September 2026
Last updated
Tue 22nd Sep 26 at
4:28PM
How windy? (On the summits)
Southerly 20-25mph, tending to strengthen, gusts to 35mph over high tops, increasing downslope too.
Effect of the wind on you?
Increasingly blustery in exposure, gusts affecting stability, not just on high terrain.
How Wet?
Any rain unlikely
A little drizzle/damp air may affect the high tops nearest Cardigan Bay into evening.
Cloud on the hills?
Little or none until later
Mist in some sheltered valleys around dawn, this soon lifting and dissipating for clear hills. Late in day, cloud banks may drift onto some high western tops.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sun through high cloud. Very good visibility.
How Cold? (at 900m)
8C rising to 11C, staying elevated overnight.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 25th September 2026
Last updated
Tue 22nd Sep 26 at
4:28PM
How windy? (On the summits)
Westerly 15 to 25mph.
Effect of the wind on you?
Fairly small, but feeling blustery at times in exposed on higher tops and ridges.
How Wet?
Rain mostly west
Rain likely soon fairly persistent northwestern areas, may fade a little with time. Further south and east likely drier early in day, then occasional rain.
Cloud on the hills?
Most persistent west
Some cloud or fog banks from lower elevations inland in the morning, tending to disperse or lift onto higher slopes. Most persistent west Snowdon/Yr Wyddfa group above 600-800m in rain, breaks east.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Some weak sun through high cloud. Some early misty low cloud, visibility then reduced in rain, poor toward west, better if dry east/mid Wales.
How Cold? (at 900m)
Around 10C, little change all day.
Freezing Level
Above the summits.
Planning Outlook
Southwesterly winds increase again on Thursday and rain later moves into western Scotland, but elsewhere is likely dry, bright in Wales and much of England. A variable outlook continues into the weekend and beyond with high pressure building from the south at times with fairly warm and dry conditions, but Atlantic systems still pass to the north bringing occasional rain and showers toward western Scotland at least, strong wind here with sustained gales in the north. Next week remains on the unsettled side: west-southwesterly wind with bands of rain passing over most mountains, but a trend towards higher pressure brings longer settled windows into October.