Eryri / Snowdonia National Park

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

Today's Forecast

Click an icon for more information or click here for a key to all icons.

Click here to download the latest PDF Last Updated Wed 18th Sep 24 at 1:24PM
View our detailed version Last Updated Wed 18th Sep 24 at 1:24PM

Viewing Forecast For

Eryri / Snowdonia National Park
Thursday 19th September 2024
Last updated Wed 18th Sep 24 at 1:24PM

Summary for all mountain areas

Dry and bright sunshine for almost all British hills. Patches of valley fog in the morning, especially near the coast, lakes or rivers. Warm, temperature rising to over 20C in most valleys. Light winds, sometimes hardly any wind. Excellent visibility, especially toward the north.

Headline for Eryri / Snowdonia National Park

Dry, sunny & warm, patches of valley fog in the morning

How windy? (On the summits)

Easterly 15 to 25mph, at times less or even lull.

Effect of the wind on you?

Fairly small, although local sudden gusts both on higher and some lower slopes.

How Wet?

Rain not expected

Cloud on the hills?

Very little if any

Fog shrouding lower slopes below or well below 450m, manly east Wales. Will disperse latest middle of day.

Chance of cloud free summits?

Almost certain

Sunshine and air clarity?

Extensive or unbroken bright sunshine. Ribbons of fog some valleys and lower slopes east Wales, mainly morning. Very good visibility above the layer of fog or low cloud.

How Cold? (at 900m)

14C

Freezing Level

Above the summits.

Viewing Forecast For

Eryri / Snowdonia National Park
Friday 20th September 2024
Last updated Wed 18th Sep 24 at 1:24PM

How windy? (On the summits)

Easterly 20 or 25mph.

Effect of the wind on you?

Fairly small

How Wet?

Risk of a little rain

Risk low, but there may be one or two periods of showery rain toward the evening toward the south - possibly a heavy burst with very low risk an isolated thunder. First half of the day surely dry.

Cloud on the hills?

Increasingly widespread

Higher, particularly western & northern mountains may well be cloud free all day. Lower down, cloud between 200m and 600-700m (top of the cloud) extensive east Wales, more broken west. This may extend to higher slopes late in the day.

Chance of cloud free summits?

60%

Sunshine and air clarity?

Patches of sunshine, mainly west Wales. Hazy, particularly east Wales.

How Cold? (at 900m)

15C, but very much colder, perhaps only 7C, where in cloud.

Freezing Level

Above the summits.

Viewing Forecast For

Eryri / Snowdonia National Park
Saturday 21st September 2024
Last updated Wed 18th Sep 24 at 1:24PM

How windy? (On the summits)

East to northeasterly, 15 to 20mph.

Effect of the wind on you?

Small.

How Wet?

Chance brief shower southeast.

Rain unlikely in Snowdonia, but chance for showers on the hills, highest east of the river Conwy, especially toward the south. Here risk an isolated thunder.

Cloud on the hills?

Hills covered at times on various levels

Thick valley fog in the morning below 500m. During the day fog slowly dispersing, but afternoon cloud possibly coming and going on various higher levels.

Chance of cloud free summits?

60%, tops in the morning cloud-free

Sunshine and air clarity?

Patchwork of sun, clouds most frequently in the east and southeast. Moderate/good viisbility, haze in the air.

How Cold? (at 900m)

11 to 13C

Freezing Level

Above the summits.

Planning Outlook

High pressure conditions with a lot of sunshine, warm temperatures and calm winds will continue until early next week in Scotland and northern England. In Wales and Peak District from Friday onward mix of sun and clouds, with locally heavy showery bursts of rain, possibly isolated thunder. Beginning of next week showers possible also northern England and parts of Scotland, although Highlands still mostly dry and sunny until mid next week. Then, weather conditions may deteriorate across all British mountains with cooling and strong winds, although further development uncertain.