Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Friday's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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
Friday 27th March 2026
Last updated
Thu 26th Mar 26 at
3:10PM
Summary for all mountain areas
Wind strengthens across Scottish mountains to gale-force, significant chill factor. A dry morning central-eastern Highlands, but snow showers in the west develop widely and become heavier with hail. Early rain clears southeastward over England, cloud lifts and breaks; slower to improve southward across Wales.
Headline for Eryri / Snowdonia National Park
Wind lessens, early rain and low cloud clearing.
How windy? (On the summits)
Westerly 30mph from dawn, stronger gusts for a time into morning. Easing to west-northwesterly 20mph in morning, briefly less, then rising gradually afternoon to 25mph. Into night 30-35mph.
Effect of the wind on you?
Walking impeded with buffeting gusts at first, but improving to be fairly small by mid-morning. Feeling breezier and increasingly chilly later.
How Wet?
Morning rain, drier afternoon
Often raining from dawn through morning, occasional heavy falls mostly western areas. Rain breaks for a dry afternoon, thought later an odd shower onto western slopes towards Cardigan Bay/Anglesey, snow above 600-700m.
Cloud on the hills?
Fairly extensive, improving
Fairly extensive through the morning, from middle slopes up, to lower slopes in the west during rain. A lifting trend, mostly above 700m by noon, then more substantially breaking afternoon, patches grazing high tops.
Chance of cloud free summits?
20% rising to 70% afternoon.
Sunshine and air clarity?
Glimpses of sun breaking out with time. Visibility often poor in rain, improving to very good afternoon.
How Cold? (at 900m)
4C at dawn, tending to drop, 1 or 2C afternoon, then -1C into evening. Where exposed to wind, feeling like -5C.
Freezing Level
Above the summits in morning, but dropping into afternoon to 1000m, then from dusk 700-800m.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 28th March 2026
Last updated
Thu 26th Mar 26 at
3:10PM
How windy? (On the summits)
West-northwesterly 30 to 45mph, likely strongest in the morning, squally gusts.
Effect of the wind on you?
Strenuous walking over the hills, frequent buffeting at least in morning. Significant wind chill.
How Wet?
Hail and snow showers
Showers most frequent in west from dawn, but extending inland and eastwards, brief hail, snow falling in morning to 300-400m, with time mostly rain below 600m. Fewer and lighter showers afternoon.
Cloud on the hills?
Varied over tops, lifting higher
Varied cloud capping higher slopes in the morning above 600-800m, lowest around showers near coasts. Lifting above higher slopes increasingly often into afternoon.
Chance of cloud free summits?
30% rising to 60%
Sunshine and air clarity?
Patchwork of cloud and sun, best in east in morning. Visibility often very good, but reduced at times to briefly very poor in showers.
How Cold? (at 900m)
-1C rising to +1C afternoon. Wind chill feeling like -10 to -15C.
Freezing Level
700m in morning, plus frost sheltered inland valleys around dawn, rising just above freezing to highest tops afternoon.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 29th March 2026
Last updated
Thu 26th Mar 26 at
3:10PM
How windy? (On the summits)
Southwest later westerly 45 to 60mph, speed varying, likely to peak into middle of day, sudden powerful squalls.
Effect of the wind on you?
Difficult walking conditions on mountains, becoming severe for a time, any mobility challenging. Significant wind chill.
How Wet?
Rain becomes heavy for a time
A swathe of rain moving in from west in morning, possible sleet or brief snow on tops. A more intense band moving southeastwards into middle of day. Then showery rain on and off.
Cloud on the hills?
Lowest in rain toward west
Varied mostly over higher western slopes early in day, but filling in more extensively, lowering to 500-600m. Then rising late in day with some breaks forming to tops.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy, may brighten up late in day. Visibility very poor in rain, improving later to intermittently very good out of showers.
How Cold? (at 900m)
1C rising to 3C. Wind chill feeling like -12 to -15C.
Freezing Level
Rising from before dawn to be just above freezing to the tops by late morning at least.
Planning Outlook
Changeable westerlies prevail onward into early next week, continuing gales over most high terrain. Below freezing on Scottish mountains above 700-800m into Monday with snow showers; higher freezing level further south, above the tops in Wales with mostly drizzly rain here. Milder air lifts above freezing to all tops into Tuesday with low cloud, drizzle and rain, most persistent west-northwest Scotland. Mixed conditions likely continue, but some windows of better weather mid-late in the week - temperatures vary above and just below freezing on Scottish tops. Potential for cold conditions again early April, but drier conditions possibly more common by then.