Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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.
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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.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 14th April 2026
Last updated
Mon 13th Apr 26 at
4:17PM
Summary for all mountain areas
Patchy light rain and fog soon spread into Wales from the south, soon windy too, briefly gales. Starting sunny elsewhere, high cloud spreads north over England, later into central Scotland. Patchy rain into Lakeland to the west Highlands later, wind strengthens, gales coastal west Highlands. Northern Scotland stays sunny.
Headline for Eryri / Snowdonia National Park
Patchy rain and fog set in though morning; windy, gale-force gusts
How windy? (On the summits)
Southerly, 15-20mph in morning, quickly strengthening, 30-40mph afternoon into dusk; some variability and likely stronger for a time afternoon, gusts approaching 50mph at least for a time.
Effect of the wind on you?
Fairly small from dawn, but soon becoming more blustery over higher terrain, walking increasingly arduous with notable wind chill despite milder temperatures; challenging walking for a time in strongest afternoon wind.
How Wet?
Rising risk of patchy rain, little until later
Patchy rain arrives from the southwest as midday approaches, rainfall totals generally low. Rain more frequent with heavier moments for a few hours, but trending patchier again with lingering drizzle over high tops. Returning more frequently into night.
Cloud on the hills?
Becoming extensive through morning
Patchy cloud around some slopes early morning, local mist inland valleys at first. Through morning, bases lowering to the tops, patchy at first, but soon spreading more widely to the middle slopes by midday, extensive to lower western slopes late in the day. Highest bases Carneddau, 600-700m.
Chance of cloud free summits?
70% at sunrise, soon lowering, almost nil by midday
Sunshine and air clarity?
Some sunshine at dawn, soon weakened by high cloud and increasingly overcast, often dull in rain. Visibility starts good but trending poor in rain and fog.
How Cold? (at 900m)
3C rising to 6 or 7C, staying elevated into night. Feeling colder later in day as wind increases.
Freezing Level
May just touch the summit of Snowdon at dawn, local light frosts in sheltered valleys too. Soon lifting above freezing to tops.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 15th April 2026
Last updated
Mon 13th Apr 26 at
4:17PM
How windy? (On the summits)
Southerly 40-55mph; powerful gusts, not just high elevations, locally variable direction. Southwesterly trend later.
Effect of the wind on you?
Arduous to often challenging walking with significant wind chill all day; gusts constantly affecting stability.
How Wet?
Drizzle, patchy rain, more later
A persistent drizzle over the summits likely all day, to the middle slopes early, with patchy rain occasionally drifting from the southwest too. Rain sets in persistent and heavy for several hours later, may break late in the day.
Cloud on the hills?
Extensive, some improvement east-Wales
Extensive to at least middle slopes at dawn, to lower slopes or valley level facing Cardigan Bay/Llyn Peninsula. Bases lift somewhat, best Berwyn group, to 600-800m, local breaks afternoon. Snowdonia/western slopes stay shrouded to at least 500m or lower.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Bursts of sunshine breaking out on lower slopes east, little or no sun west. Largely poor visibility but locally very good where cloud base lifts.
How Cold? (at 900m)
6 or 7C most of the day. Sudden cooling later afternoon, around 4C by evening. Feeling like -5 to -10C in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 16th April 2026
Last updated
Mon 13th Apr 26 at
4:17PM
How windy? (On the summits)
Southwesterly 30-40mph at dawn, gradually easing to 20-25mph, stronger speeds over tops at times.
Effect of the wind on you?
Strenuous walking with a chilly feeling at dawn, an easing trend, may become fairly small but blustery in exposure.
How Wet?
Drizzle, some light showers
Drizzly over high terrain much of morning, to some middle western slopes. Drizzle will tend to ease, but scattered light showers will occur here and there through afternoon.
Cloud on the hills?
Lifting to just high tops
Most terrain above 700m in cloud from dawn, to 500m western slopes. Bases rising to mostly just caps on the high tops of Snowdonia NP around midday, with an increasing chance of summit breaks.
Chance of cloud free summits?
30% rising to 60%
Sunshine and air clarity?
Sunshine increasingly breaking out to a patchwork afternoon, slow to break in the west. Visibility becoming very good.
How Cold? (at 900m)
3 or 4C, may rise slightly. Feeling as cold as -8C in early wind.
Freezing Level
Above the summits.
Planning Outlook
Milder from Wednesday into the weekend, but Scottish high tops below freezing at times, locally lower in the northwest. Unsettled conditions in the immediate near-term with showers (sometimes heavy with hail and lightning), occasionally more persistent rain, accompanied by often gusty winds, gales over mountains for periods, but also brighter spells between rain. With spring sunshine, temperatures will tend to rise several degrees during daylight, often becoming warm in the valleys; slopes north of major hill groups often milder. Saturday sees continued showers, mostly north and west, but higher pressure gradually builds through late weekend into early next week, bringing fewer showers and lighter winds; chilly overnight, but fairly mild spring days. Confidence is low regarding how long high pressure will establish.