Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday'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.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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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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.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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 24th March 2026
Last updated
Mon 23rd Mar 26 at
3:55PM
Summary for all mountain areas
Widespread gales, severe early in Scotland. Showers in west Scotland, pushing east, turning snowy and setting in for a time. Near constant rain for Lakeland and Yorks Dales, becoming heavy with a rising flood risk. Rain spreads widely across England and Wales later, wind strengthens in Wales.
Headline for Eryri / Snowdonia National Park
Gales and rain, both deteriorating into afternoon/evening
How windy? (On the summits)
Southwesterly 40 to 50mph through morning, strengthening afternoon to 50-60mph; very gusty with strongest gusts over high tops approaching 70mph.
Effect of the wind on you?
Difficult conditions across the mountains all day with significant wind chill. Mobility difficult in exposure and conditions deteriorating further through afternoon.
How Wet?
Rain on-and-off, setting in heavier afternoon
Rain on and off at least, more persistent western hills, mixed with drizzle. With time, increasingly setting in for steadier and heavy rain, risk of substantial downpours later. Around/after nightfall, rain turns to snow on the high tops.
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?
10%
Sunshine and air clarity?
Generally cloudy, some brighter moments mainly morning and in east Wales. Visibility good if dry below cloud (some haze towards coasts), becoming poor then very poor later in rain.
How Cold? (at 900m)
6C well into the day. As evening approaches, beginning to lower, sharply dropping after nightfall to below freezing. Feeling like -12 to -15C in the wind.
Freezing Level
Above the summits, then toward or after dusk, dropping rapidly onto tops, lowering to around 600m into night.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 25th March 2026
Last updated
Mon 23rd Mar 26 at
3:55PM
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)
-2 or -3C, 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.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 26th March 2026
Last updated
Mon 23rd Mar 26 at
3:55PM
How windy? (On the summits)
Northerly 20-30mph early, some gustiness, shifting westerly and easing to 15-20mph.
Effect of the wind on you?
Walking impeded with balance challenges on high exposed ridges early. Easing to fairly small effects.
How Wet?
Dry after a few early light snow showers
A few early snow showers affecting the Snowdon group towards Carneddau, these soon fading for a dry day. Late in the day, some light patchy rain possible here and there, amounting to little.
Cloud on the hills?
Mostly just high terrain
At dawn, cloud banks on the hills at various heights, most extensive on north and western hill groups. Cloud soon lifts to banks affecting terrain above 800-900m, occasional summit breaks. Will become more extensive into evening and then lower.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Bright sunshine in the morning, gradually weakened by building high cloud. Excellent visibility.
How Cold? (at 900m)
-2 or -3C, rising towards 0C by evening, rising further overnight. Feeling like -10 to -13C in early wind.
Freezing Level
600-700m, though lower frosts likely early. Will sharply lift to above the summits overnight.
Planning Outlook
Cold, wintry conditions across all mountains into midweek - significant chill factor from gale force west then northwesterly winds. 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.