Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
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.
Bright sunshine
Beware of sunburn from bright spring sunshine, despite feeling cool in any breeze on higher terrain.
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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
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.
Bright sunshine
Beware of sunburn from bright spring sunshine, despite feeling cool in any breeze on higher terrain.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 29th April 2026
Last updated
Tue 28th Apr 26 at
4:24PM
Summary for all mountain areas
Dry with extensive strong sunshine all day, beware sunburn. Patchy low-level fog soon clearing early morning. Fairly light wind for much of the Highlands, but gustier further southwest. Strong and gusty easterlies for England and particularly Wales, powerful gale-force gusts downslope in places.
Headline for Eryri / Snowdonia National Park
Windy, gales around the hills, powerful gusts. Sunshine.
How windy? (On the summits)
Easterly 35 to often 45mph; frequent gusts 55mph near/west of major tops, through passes, locally downslope to west, strongest speeds not necessarily on summits. Evening into night, speeds and gusts increase further, over 60mph.
Effect of the wind on you?
Arduous walking most of day with notable wind chill despite mild temperatures; sudden buffeting in places, not just on the tops, strongest gusts making balance difficult, you may be blown over.
How Wet?
No rain expected
Cloud on the hills?
None expected
Brief patches of cloud from dawn on some slopes in eastern mid Wales, this soon dissipating for cloud-free hills.
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Widely sunny. Very good visibility.
How Cold? (at 900m)
5C rising to 7 or 8C. Directly in strongest wind, feeling like -8C early in day, -4C afternoon.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 30th April 2026
Last updated
Tue 28th Apr 26 at
4:24PM
How windy? (On the summits)
Southeasterly 40 to 50mph with powerful gusts early in day, tending to lessen gradually during day to 25-30mph.
Effect of the wind on you?
Challenging walking and difficult balance in gusty places in the morning, marked wind chill; tending to improve, but still blustery.
How Wet?
No rain expected
Cloud on the hills?
None expected
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Extensive sunshine, some thin high cloud mainly toward southwest. Very good visibility, possibly slight haze.
How Cold? (at 900m)
8C rising to 11C afternoon. Feeling as cold as -5C in the wind early morning.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 1st May 2026
Last updated
Tue 28th Apr 26 at
4:24PM
How windy? (On the summits)
South-southeast, later in day turning southwesterly, 15 to 20mph, occasional 25mph, gusts mainly if showers occur.
Effect of the wind on you?
Mostly fairly small.
How Wet?
Risk bursts of rain forming
High uncertainty - odd spots from high cloud, then with time an increasing risk that bursts of rain develop, possibly thundery.
Cloud on the hills?
Little if any prior to rain
Much cloud above the mountains, but locally if rain occurs, some cloud banks form on tops, possible ragged patches at various heights.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Sun mostly weak through a veil of high cloud, which may thicken to cover the sky. Visibility good, but some haze likely.
How Cold? (at 900m)
10C, little change, then tending to lower later in day to 7C.
Freezing Level
Above the summits.
Planning Outlook
Dry and sunny through Thursday, but windy with powerful gusts particularly England and Wales. Then a change to more mixed conditions, with sporadic bursts of rain developing on Friday. In the short-term, very dry grass and moorland conditions over mountain terrain continues to present a very high fire risk. Lower pressure into the Bank Holiday weekend - cooler with a mix of sunny spells and showers in the extended forecast, but uncertain local details. Higher Scottish mountains particularly toward the north at least briefly dropping to around freezing over the weekend. Also expect slight frost more widely in sheltered valleys up to dawn through this week and the weekend where skies are clear.