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.
Winter kit required on higher terrain
Snow cover over higher mountains. Safe progress over some terrain will require suitable footwear - possibly crampons and ice-axe where necessary.
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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.
Winter kit required on higher terrain
Snow cover over higher mountains. Safe progress over some terrain will require suitable footwear - possibly crampons and ice-axe where necessary.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 28th March 2026
Last updated
Fri 27th Mar 26 at
4:20PM
Summary for all mountain areas
Feeling bitterly cold in gale-force west-northwesterly winds widely, severe gales on higher Scottish mountains. Extensive showers with hail, snow, chance of isolated thunder, locally grouping into more constant precipitation NW Highlands, also N England in morning; intensity of showers easing during afternoon.
Headline for Eryri / Snowdonia National Park
Upland gales. Hail and snow showers.
How windy? (On the summits)
West-northwesterly 35 to 45mph, strongest in the morning, squally gusts over 50mph on higher mountains for a time; lessening gradually afternoon-evening.
Effect of the wind on you?
Strenuous walking over the hills, more difficult in places for a few hours on high exposed terrain, frequent buffeting. 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; chance isolated lightning early morning near coast. 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 toward 1000m afternoon.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 29th March 2026
Last updated
Fri 27th Mar 26 at
4:20PM
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, bright skies at dawn soon fade; may brighten up toward sunset. Visibility very poor in rain, improving late in the day if rain clears.
How Cold? (at 900m)
0C rising to 3C afternoon, then dropping back toward 0C after dark. 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. Likely back onto tops into night.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 30th March 2026
Last updated
Fri 27th Mar 26 at
4:20PM
How windy? (On the summits)
Northwesterly 35 to 45mph, strongest in the morning, gusts over 50mph for a time higher mountains.
Effect of the wind on you?
Strenuous walking conditions, frequent buffeting in exposure, balance difficult on ridges. Considerable wind chill.
How Wet?
Light showers for a time
An odd light shower or snow flurry over hills above 600m in morning, fading out.
Cloud on the hills?
Lifting to higher tops, breaks form
Cloud banks drifting over higher slopes, mostly above 600-700m in morning, tending to rise. Patches come and go on high western tops, increasing breaks. Will then lower from southwest into night.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Occasional sun, most common east. Visibility mostly good, slight haze.
How Cold? (at 900m)
0C rising to 3C afternoon, then higher after dark. Wind chill feeling like -10 to -13C.
Freezing Level
900-1000m from dawn, rising above the summits.
Planning Outlook
Changeable westerlies prevail onward into early next week, continuing gales over most high terrain. Milder air lifts above freezing to all tops into Tuesday with low cloud, drizzle and rain, most persistent west-northwest Scotland. Likely colder again in Scotland by Wednesday with some further hill snow likely. Some windows of better weather mid-late in the week as higher pressure is nearby - temperatures vary above and just below freezing on Highland tops, more often above freezing England and Wales tops. Some chilly air possible during early April, but drier conditions likely developing with time with more spring sunshine.