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.
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.
Chilly
Air temperature near or just above freezing on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate 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.
Chilly
Air temperature near or just above freezing 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
Thursday 17th April 2025
Last updated
Wed 16th Apr 25 at
4:28PM
Summary for all mountain areas
Snow setting in for a time over the Munros in Scotland, staying sub-zero on high tops. Showery in the Southern Uplands. Windy with bursts of rain in north England, fading through afternoon as cloud lifts and breaks. Mostly dry with a brisk breeze south Pennines and Wales with frequent sunshine.
Headline for Eryri / Snowdonia National Park
Frequent sun after cloud disperses. Winds easing.
How windy? (On the summits)
At dawn, westerly 20-30mph, soon easing to 10-15mph and beginning a southerly shift. Returning to near 20mph around dusk.
Effect of the wind on you?
Mostly small after some uncomfortable breezes at dawn.
How Wet?
Substantially dry
Substantially dry most of the day. Chance of brief and isolated drizzly showers in the afternoon.
Cloud on the hills?
Few patches over high terrain
Cloud banks here and there in the morning over high terrain, soon breaking. Mountains will stay mostly clear with a few cloud caps over high tops coming and going.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Frequently sunny for much of the day, patchy cloud building in through the afternoon. Excellent visibility.
How Cold? (at 900m)
1C, rising to 4C
Freezing Level
Possibly just grazing the highest summits at dawn, soon lifting above.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 18th April 2025
Last updated
Wed 16th Apr 25 at
4:28PM
How windy? (On the summits)
Southeasterly 35-45mph. Chance of sudden strong gusts around lower slopes in the morning.
Effect of the wind on you?
Walking often strenuous with considerable buffeting. Balance affected on exposed terrain. Significant wind chill.
How Wet?
Some bursts of rain, increasing later
A few bursts of rain arriving after dawn. Increasing in frequency in the later afternoon with some heavy moments.
Cloud on the hills?
Caps over high terrain after noon
Cloud caps come and go over high tops during rain, though often clear. Cloud increasing in frequency later with bases occasionally covering most high terrain.
Chance of cloud free summits?
60%
Sunshine and air clarity?
No sun expected. Good visibility, though weakening in rain.
How Cold? (at 900m)
4 to 6C. Wind chill feels like -7C.
Freezing Level
Above the summits
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 19th April 2025
Last updated
Wed 16th Apr 25 at
4:28PM
How windy? (On the summits)
Southeasterly 30-35mph, some sudden gusts up to 40mph at dawn. Shifting easterly and easing, 20-25mph.
Effect of the wind on you?
Strenuous walking early with considerable buffeting. Easing, through remain inconvenient. Feeling chilly in the wind.
How Wet?
Some patchy light rain through midday
A few moments of patchy light rain come and go through middle of the day. Fading for a mostly dry afternoon.
Cloud on the hills?
High areas early, becoming often clear
At dawn, cloud banks cover much high terrain, though lifting and dispersing. A few passing cloud caps come and go through the day.
Chance of cloud free summits?
Becoming 80%
Sunshine and air clarity?
Some glimpses of sun, though weakened by high cloud. Excellent visibility.
How Cold? (at 900m)
4 or 5C
Freezing Level
Above the summits
Planning Outlook
Several cores of low pressure are circulating around the British Isles through the weekend and into next week. Western areas are likely to see rain with a few stray showers into the east. High pressure will briefly build in on Easter, settling the weather momentarily. Southern areas will see showers into early next week and low pressure will become dominant in the Atlantic, which may push several bands of rain eastward toward the British Isles, though details remain uncertain at this point. Temperatures will be near average or slightly cooler, depending on the position of low pressure.