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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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 20th April 2026
Last updated
Sun 19th Apr 26 at
4:00PM
Summary for all mountain areas
Hill snow and rain lower down in northeast Scotland from early in the day, locally persistent for a time. Showers form across Scotland and northern England during the day, locally increasingly heavy with hail. Blustery toward northwest Scotland, otherwise fairly light wind until late in day. Staying at freezing on high Scottish tops.
Headline for Eryri / Snowdonia National Park
Wind fairly light. Sunshine then a few showers develop.
How windy? (On the summits)
Easterly, 15mph or occasionally less, local gusts in showers. Tending to strengthen later in day, to easterly 25-30mph by dusk onward, stronger further into night.
Effect of the wind on you?
Mostly small. Late in day starting to feel more blustery and notably chilly.
How Wet?
Scattered showers afternoon
Substantially dry morning. Then a scattering of brief showers develop into afternoon, moving westwards, an odd heavier one with hail possible toward west, snow high tops, but locally often dry.
Cloud on the hills?
Mostly little
Patchy cloud banks mostly eastern tops above 700m in morning, occasionally drifting over higher Snowdon group for a time. Lifting higher up, leaving most cloud above hills afternoon, brief lowering patches in showers.
Chance of cloud free summits?
70% rising to 90%
Sunshine and air clarity?
Patchwork of cloud and sun; best in the morning, cloud filling in more in afternoon. Visibility often excellent, briefly reduced in showers.
How Cold? (at 900m)
1C rising to 3C afternoon. Where exposed to wind, feeling like -5C early in day, later -2C.
Freezing Level
Slight frost in valleys and close to freezing on highest summits from dawn. Rising above freezing to all tops.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 21st April 2026
Last updated
Sun 19th Apr 26 at
4:00PM
How windy? (On the summits)
Easterly 25 to 35mph, very gusty in places around higher tops, through passes and locally downslope to west, local 40mph.
Effect of the wind on you?
Considerable wind chill in exposure, blustery spots affect balance and make walking uncomfortable.
How Wet?
Precipitation unlikely
Small chance of patchy light showers, mostly east Wales in the morning.
Cloud on the hills?
Varied then lifting
Cloud banks above 600-700m, mostly areas from Carneddau to Berwyn and Bala in morning, more broken in west. Tending to lift higher and likely to all break up.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Fairly cloudy, some brighter sunnier moments mostly west coastal areas. Visibility very good.
How Cold? (at 900m)
1C rising to 3C afternoon. Directly in the wind, feeling like -7 to -10C.
Freezing Level
Near to freezing on highest summits in morning, then further above all tops.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 22nd April 2026
Last updated
Sun 19th Apr 26 at
4:00PM
How windy? (On the summits)
Easterly 30 to 40mph, but local gusty spots may approach 50mph around higher mountains.
Effect of the wind on you?
Very blustery, strenuous walking on tops, buffeting gusts challenging balance not just higher slopes. Marked wind chill.
How Wet?
No precipitation expected
Cloud on the hills?
Hardly any west, early cloud east
Patchy cloud banks drifting over some hills early morning, mostly Bala and Berwyn group, some patches may roll westwards for a time, but all likely to disperse.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sunshine most or all day west, and developing increasingly in east. Visibility good, but slight haze.
How Cold? (at 900m)
3C rising to 6C. Feeling like -5 to -10C directly in the wind, coldest in the morning.
Freezing Level
Above the summits. Possible pockets of frost sheltered spots both higher and lower slopes at dawn.
Planning Outlook
A drier outlook through late April as high pressure resides over Britain, centred generally toward the north. Easterly winds prevail this week, strong and gusty over England and Wales, gale-force in places through midweek. Less windy further north across Scotland and becoming lighter winds everywhere by later in the week. Western mountains generally clear with plenty of sunshine throughout this week ahead, variable cloud at times drifting onto some eastern hills. Some overnight frosts into valleys. Daytime temperatures rising several degrees above freezing to highest tops, warmest in west. Risk of a strengthening chilly northerly wind for a time during next weekend.