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Eryri / Snowdonia National Park Forecast

Eryri / Snowdonia National Park

Includes all summits in the the northern half of Wales from Pumlumon northwards.

Today's Forecast

Gale force, walking arduous
Drizzle
Cold

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Click here to download the latest PDF Last Updated Sun 3rd Mar 24 at 4:30PM Last Updated Sun 3rd Mar 24 at 4:30PM
View our low-graphics version Last Updated Sun 3rd Mar 24 at 4:30PM Last Updated Sun 3rd Mar 24 at 4:30PM

Viewing Forecast For

Eryri / Snowdonia National Park
Monday 4th March 2024
Last updated Sun 3rd Mar 24 at 4:30PM

Summary for all mountain areas

Fine with sunshine for north and western Scotland, some banks of cloud toward the central & southeast Highlands. Southeasterly winds will strengthen, upland gales developing, becoming severe for Welsh mountains. Rain moves into Wales from the southwest.

Headline for Eryri / Snowdonia National Park

Upland gales becoming severe. Dry many hours, rain later.

How windy? (On the summits)

Southeasterly - speeds likely to increase rapidly 30 to 50mph, risk gusts 60-70mph for a few hours; easing later.

Effect of the wind on you?

Soon deteriorating; near and north of major tops powerful gusts may knock you off your feet; significant wind chill.

How Wet?

Rain and summit snow mainly later in day

Dry morning into early afternoon, or longer in north, perhaps dry most of daylight. Spots of rain developing from the south, becoming more persistent rain by late afternoon into evening and overnight, snow falling mostly above 700-900m; totals fairly small toward north.

Cloud on the hills?

Mostly little, lowering later

Varied extent of cloud - until well into afternoon, only patches on high tops, much cloud above the hills. Lowering over higher slopes as rain develops, may fill in near coast late afternoon. Highest bases remaining north of A5.

Chance of cloud free summits?

70% dropping later to 30%

Sunshine and air clarity?

Weak sun and high cloud, gradually clouding over. Visibility good, slight haze, reducing later in rain and hill snow.

How Cold? (at 900m)

0 or -1C, lifting to +1C. If exposed to stronger winds, chill factor feeling like -17C on high tops.

Freezing Level

Frost in valleys from dawn. Lifting toward 1000m into afternoon, but may drop slightly again by evening to 800m for a time in heavier precipitation.

Viewing Forecast For

Eryri / Snowdonia National Park
Tuesday 5th March 2024
Last updated Sun 3rd Mar 24 at 4:30PM

How windy? (On the summits)

Southwesterly, 15 to 25mph, at times 30mph higher summits.

Effect of the wind on you?

Fairly small, but blustery for periods, may affect walking and balance on exposed tops and ridges; marked wind chill.

How Wet?

Occasional drizzle

Patchy drizzle early in the day likely to fade and clear in the morning. Occasional drizzly showers following near to western coasts.

Cloud on the hills?

Mostly higher tops

Varied banks of cloud across the hills, becoming mostly confined to upper slopes. Breaks to tops best north of Ogwen Valley.

Chance of cloud free summits?

40%

Sunshine and air clarity?

Broken cloud, sun best in north. Visibility mostly good.

How Cold? (at 900m)

0C rising to 2C. Wind chill -7C on high tops.

Freezing Level

1000m, rising just above freezing to highest tops.

Viewing Forecast For

Eryri / Snowdonia National Park
Wednesday 6th March 2024
Last updated Sun 3rd Mar 24 at 4:30PM

How windy? (On the summits)

Southeasterly, 20mph, up to gusty 30mph around higher mountains and through elevated passes.

Effect of the wind on you?

Varied, some slopes fairly small, but blustery around exposed higher terrain, sudden gusts through passes.

How Wet?

Largely dry

Local pockets of drizzle possible, but amounting to very little.

Cloud on the hills?

Local banks

Risk banks of low cloud covering eastern hills for a few hours, base tending to rise with time. Further west, some patches over the tops, but good breaks likely.

Chance of cloud free summits?

60%

Sunshine and air clarity?

Broken cloud, sun best in west. Visibility good, very good if sunnier.

How Cold? (at 900m)

0 or +1C. If exposed to wind, chill factor feeling like -7 to -10C.

Freezing Level

Lifting just above freezing point on highest tops. Patchy frost in valleys at first.

Planning Outlook

High pressure over Scandinavia expands to the north of Scotland during the week ahead, whilst areas of low pressure circulate southwest of the British Isles. East or southeasterly winds are likely to prevail over the next couple of weeks, chillier air drawn in at times. Easterly upland gales possible late this week into the weekend. Recent fresh snow coverage will remain across many mountains this week - staying near or below freezing point over higher terrain. Milder air reaching Wales into midweek. Further snow flurries mostly for the eastern Highlands. Western Scotland likely to see an extended period with little precipitation. Possibly widely drier into mid-March under higher pressure.