Mountain Weather
Information Service
Snowdonia National Park Forecast

Snowdonia National Park

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

Click here to download the latest PDF Last Updated Sat 28th May 22 at 2:27PM Last Updated Sat 28th May 22 at 2:27PM
View our low-graphics version Last Updated Sat 28th May 22 at 2:27PM Last Updated Sat 28th May 22 at 2:27PM

Viewing Forecast For

Snowdonia National Park
Sunday 29th May 2022
Last updated Sat 28th May 22 at 2:27PM

Summary for all mountain areas

Chilly northerly winds, mostly fairly light, will bring a few showers, of snow higher areas Scottish Highlands, but the risk of heavier showery rain to Wales - mainly South Wales. Patches of sun, although extensive cloud overall.

Headline for Snowdonia National Park

Light wind; patches of showery rain, mainly morning. Chilly.

How windy? (On the summits)

Northerly 10mph; perhaps 15mph higher tops Snowdon range.

Effect of the wind on you?

Negligible

How Wet?

Brief showers, mainly morning

Threat over a couple of hours in morning of patches of showery rain drifting from north into mid Wales. Just a scattering of showers in the afternoon.

Cloud on the hills?

Lifting to higher tops - may well all or nearly all clear afternoon

Varied conditions in morning: some summits extensively cloud free, whilst other areas are often cloud covered as low as 600m. Cloud base will then rise; most or all summits clearing afternoon, although the cloud could come and go above 900m on Snowdon range.

Chance of cloud free summits?

30% morning; 80% afternoon

Sunshine and air clarity?

Patches of sun although overall extensive cloud. Through afternoon, slopes closest to the coast may well become sunny. Visibility excellent.

How Cold? (at 900m)

3C rising to 6C.

Freezing Level

Above the summits.

Viewing Forecast For

Snowdonia National Park
Monday 30th May 2022
Last updated Sat 28th May 22 at 2:27PM

How windy? (On the summits)

Westerly mostly 15mph.

Effect of the wind on you?

Small

How Wet?

Showers, mainly well inland

Scattered showers morning, most likely Snowdon range. Will gradually change as most showers become confined to more eastern hills whilst toward the coast rain becomes isolated.

Cloud on the hills?

Will clear many summits

Cloud base will rise from 550 to 800m (lowest near coast) after dawn to or above 900m by late morning. But in rain, expect fog as low as 650m, temporarily lower.

Chance of cloud free summits?

70%

Sunshine and air clarity?

Patches of sunshine. Very good visibility.

How Cold? (at 900m)

4C.

Freezing Level

Above the summits.

Viewing Forecast For

Snowdonia National Park
Tuesday 31st May 2022
Last updated Sat 28th May 22 at 2:27PM

How windy? (On the summits)

Westerly 15mph.

Effect of the wind on you?

Small.

How Wet?

Showers

A few showers morning. For most areas will become dry through afternoon, initially on hills nearest the coast. However, watch for the possibility of a band (a few miles wide) of showery rain east from the Snowdon range.

Cloud on the hills?

Mostly clearing in the afternoon

Overall, expect fog to cover higher areas in the morning, before gradually clearing at least to above 900m. However, in rain, patches of low cloud likely to form, locally below 500m.

Chance of cloud free summits?

40%

Sunshine and air clarity?

Patches of sun morning. During the afternoon sunshine may extend slowly inland from off the sea to the west. The air very clear.

How Cold? (at 900m)

4C

Freezing Level

Above the summits

Planning Outlook

Relatively low temperatures on the mountains until later in the week; particularly on the Scottish highlands where higher tops will frequently be near freezing point. Showers, some heavy and thundery, giving hail and on higher tops snow, will be widespread, particularly in the afternoons, when in some areas they will merge to give a few hours of precipitation with risk thunder. Signs of a few warmer drier days toward or into next weekend.