Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday'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.
Clear
Excellent or superb visibility, no navigation issues.
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.
Clear
Excellent or superb visibility, no navigation issues.
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
Monday 23rd March 2026
Last updated
Sun 22nd Mar 26 at
4:07PM
Summary for all mountain areas
Wind speed increasing significantly across Scotland, becoming severe-gale force over mountains into afternoon. Rain and briefly some snow on tops moving in from the west. England and Wales dry, with sun through a veil of high cloud, also increasingly windy - upland gales evening into night.
Headline for Eryri / Snowdonia National Park
Increasingly windy, gales later. Dry, hills clear, weak sun.
How windy? (On the summits)
Variable 10-15mph or less early morning, soon becoming south-southwesterly, 20-25mph by noon. Increasing more rapidly toward later afternoon to 40mph, from dusk onward 50mph with stronger gusts.
Effect of the wind on you?
Fairly small up to early afternoon, but becoming more blustery, deteriorating into evening to gales on tops, walking more arduous up to dusk.
How Wet?
Precipitation not expected all day
Onward into night, some patchy rain or drizzle develops on west coastal hills.
Cloud on the hills?
None expected until night
Clear hills all daytime. Late evening into night, cloud increasingly forming and lowering over hills.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Sunshine tending to weaken as high cloud thickens, may become obscured afternoon. Visibility excellent.
How Cold? (at 900m)
0C rising to 4C by late afternoon. As wind increases, chill factor later feeling like -5C in exposure.
Freezing Level
Close to freezing above 800m, plus frost inland valleys around dawn. Lifting above freezing to tops by middle of day.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 24th March 2026
Last updated
Sun 22nd Mar 26 at
4:07PM
How windy? (On the summits)
Southwesterly 45 to 60mph, up to 70mph higher mountains for a few hours during day.
Effect of the wind on you?
Difficult conditions across the mountains, any mobility challenging in exposure. Significant wind chill.
How Wet?
Risk rain setting in heavier
Rain on and off at least, more persistent western hills, mixed with drizzle. With time, increasingly setting in for steadier and heavier rain - some uncertainty on extent. Finishing as snow on tops into evening.
Cloud on the hills?
Extensive
Shrouding the hills widely, from lower elevations upward near west coast. Higher bases mostly above 600m northeastern areas from Ogwen valley.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Generally cloudy, some brighter moments mainly morning and in east Wales. Visibility good if dry below cloud, becoming poor then very poor later in rain.
How Cold? (at 900m)
4C in morning, lowering later in day to 0C. Feeling like -12 to -15C in the wind.
Freezing Level
Above the summits, then toward or after dusk dropping rapidly onto tops, to 600m into night.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 25th March 2026
Last updated
Sun 22nd Mar 26 at
4:07PM
How windy? (On the summits)
Northwesterly 40 to 55mph, varying speeds with squally gusts around showers.
Effect of the wind on you?
Challenging walking conditions, frequent buffeting, often arduous over higher exposed terrain. Significant wind chill.
How Wet?
Frequent hail and snow
Showery snow and hail falling to lower slopes, frequent to at times near-constant over coastal areas in the north and west, but extending across all the region. Risk of isolated thunder & lightning.
Cloud on the hills?
Varying, but often capping tops
Cloud base constantly changing, will come and go all day above 800m, frequently capping high tops toward coast, patches at times to 600m. Breaks at times above tops.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Brief bursts of bright sun. Visibility intermittently very good, but appalling for periods in showers with brief whiteout over tops.
How Cold? (at 900m)
-2C, slight rise into afternoon. Wind chill feeling like -15 to -18C on tops.
Freezing Level
500m from dawn, lifting to 700m, slightly higher away from showers.
Planning Outlook
Cold, wintry conditions across all mountains into midweek - significant chill factor from gale force west then northwesterly winds. Showery hail and snow falling to increasingly lower elevations in the Highlands on Tuesday, whilst a band of heavy rain moves slowly southward over England & Wales. Hail and snow showers extend southwards into Wednesday, by then below freezing on all tops above 600-700m. Fewer showers by Thursday for many, though further snow then rain moves into western Scotland. Temperature and freezing level then varying as changeable westerlies prevail for Scotland through the weekend into early next week with periods of upland gales widely, accompanied by spells of rain, hill snow and hail showers; some windows of drier weather more often affect England & Wales.