Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Saturday'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.
Heavy snow and hail showers, isolated lightning
Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail often falling to lower slopes. Risk of very localised thunder and lightning.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
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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.
Heavy snow and hail showers, isolated lightning
Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail often falling to lower slopes. Risk of very localised thunder and lightning.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 11th April 2026
Last updated
Fri 10th Apr 26 at
4:30PM
Summary for all mountain areas
Windy with significant chill factor. Gales develop and strengthen with time England & Wales. At first, a band of persistent snowfall across the hills, rain lower slopes, soon moving away eastwards, leaving clearer conditions and scattered showers, but becoming locally heavy with hail and chance of thunder.
Headline for Eryri / Snowdonia National Park
Gales develop strengthening to be severe later. Hail showers.
How windy? (On the summits)
South to southwesterly, 25 to 35mph from dawn, gradually strengthening in morning, reaching 40-50mph into early afternoon, later 60mph high tops, 70-80mph toward and into the evening; powerful squally gusts all day in showers.
Effect of the wind on you?
Blustery in exposure from early morning, increasingly challenging conditions through afternoon, walking becoming more difficult and gusts could knock you over where exposed. Significant wind chill.
How Wet?
Hail showers, snow on tops, risk thunder
Showers stream in from the west throughout the day, scattered in morning, more frequent and longer lasting afternoon onward; heavy bursts with hail, also snow to 500m. Risk of thunder and lightning in heavier showers, particularly afternoon.
Cloud on the hills?
Mostly passing caps on high terrain
Variable cloud mostly above 700m in the morning, bases lifting through the morning, breaks forming off the tops for extended periods, but returning to the summits in showers.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Bursts of sunshine, some extended periods of sun in morning inland. Variable visibility, often very good but poor in showers.
How Cold? (at 900m)
-1 or -2C, slight rise to around 0C. Feeling like -13C to later -18C in strengthening wind.
Freezing Level
700-800m in morning, or to some lower elevations from dawn; tending to rise to 900-1000m afternoon, but dropping slightly again in showers.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 12th April 2026
Last updated
Fri 10th Apr 26 at
4:30PM
How windy? (On the summits)
Southwesterly, 30 to 40mph, up to 50mph for a time higher tops early in day; lessening gradually afternoon.
Effect of the wind on you?
Arduous walking on hills in morning, squally gusts affecting balance, tending to improve. Considerable wind chill.
How Wet?
Heavy showers, hail, snow
Broadly showery, locally more frequent precipitation for periods, mostly toward west in morning; heavy bursts with hail, snow at times falling toward 600m, risk of isolated thunder.
Cloud on the hills?
Varying on high tops
Most cloud often confined above 700-800m, clearing tops periodically, but briefly lower patches around 600m in showers, most frequent in west in morning.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Brief moments of bright sunshine. Visibility changing suddenly from very good to very poor or briefly appalling in showers.
How Cold? (at 900m)
0C rising to 2C. Wind chill feeling like -10C, nearer -15C at first on tops.
Freezing Level
900m at first, rising above 1000m.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 13th April 2026
Last updated
Fri 10th Apr 26 at
4:30PM
How windy? (On the summits)
Southerly 15 to 20mph, possibly 25mph at times higher western tops.
Effect of the wind on you?
Mostly small effect on walking, but feeling distinctly chilly in exposure on high terrain.
How Wet?
Hail showers forming increasingly
Showers mostly close to west coast early morning, then a scattering forming inland, widespread into afternoon, briefly heavy with hail, also snow may fall to 600m. Risk isolated thunder & lightning.
Cloud on the hills?
Often above hills
Patches of cloud forming around some upper slopes in the morning, mostly coastal areas in west. Lifting above most or all summits, but brief patches grazing upper slopes around showers.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Sunshine best inland in morning, then cloud building, leaving brief bursts of sun. Visibility excellent, but briefly very poor in showers.
How Cold? (at 900m)
-1C rising to +1 or 2C. Wind chill feeling like -4C to nearer -8C at first on high tops.
Freezing Level
800m at first, also frost sheltered inland valleys; rising above 1000m into middle of day and afternoon.
Planning Outlook
Chilly and showery conditions to start the new week, hail and a risk of isolated thunder into Monday afternoon, but less windy than the weekend. Drier for much of Tuesday, but rain and strengthening south-southwesterly winds likely return from the west later. Milder into mid-late next week, but Scottish high tops above 1200m close to freezing at times. Showers or more persistent rain mostly in the west, accompanied by strong winds Wednesday-Thursday. Higher pressure builds toward next weekend, bringing drier conditions overall; some chilly nights but fairly mild spring days.