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 Thu 19th Sep 24 at 1:08PM
View our detailed version Last Updated Thu 19th Sep 24 at 1:08PM

Viewing Forecast For

Eryri / Snowdonia National Park
Friday 20th September 2024
Last updated Thu 19th Sep 24 at 1:08PM

Summary for all mountain areas

Sunny, warm and calm with only morning valley fog in the Highlands. Low cloud southern Scotland and northeastern England, inversion, tops above the cloud. Sunny Lake District. East Wales under low cloud, west including Snowdon sunny & dry. Showers in Brecon Beacons. Locally gusty Welsh and English hills.

Headline for Eryri / Snowdonia National Park

Mostly dry, sunny on highest tops, cloud lower down

How windy? (On the summits)

Easterly 20 or 25mph. Locally gusty on elevated passes.

Effect of the wind on you?

Fairly small, but gusts affecting comfortable walking.

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, rain very unlikely on Snowdon/Yr Wyddfa.

Cloud on the hills?

Lower slopes often covered at first

Higher, particularly western & northern mountains clear all day. Lower down, cloud between 200m and 400-600m (top of the cloud) extensive east Wales, more broken west.

Chance of cloud free summits?

70%

Sunshine and air clarity?

Patches of sunshine east Wales, very sunny in the west. Hazy.

How Cold? (at 900m)

13C, sometimes colder lower down where in cloud.

Freezing Level

Above the summits.

Viewing Forecast For

Eryri / Snowdonia National Park
Saturday 21st September 2024
Last updated Thu 19th Sep 24 at 1:08PM

How windy? (On the summits)

East to northeasterly, 15 to 20mph. Sudden gusts up to 40mph through elevated passes & west of major ridges.

Effect of the wind on you?

Small, but gusts locally may significantly affect your balance and stability.

How Wet?

Showers, most south, locally heavy

Frequent showers during the afternoon, highest risk east toward the south. Moderate risk thunder.

Cloud on the hills?

Hills covered at times on various levels

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?

50%, tops in the morning cloud-free

Sunshine and air clarity?

Patchwork of sun, clouds most frequently in the east and southeast. Good visibility, some haze in the air.

How Cold? (at 900m)

11 to 13C

Freezing Level

Above the summits.

Viewing Forecast For

Eryri / Snowdonia National Park
Sunday 22nd September 2024
Last updated Thu 19th Sep 24 at 1:08PM

How windy? (On the summits)

Northeast to southeasterly, mean wind 10 to 25mph, but gusts may exceed 40mph locally. Strongest in the south.

Effect of the wind on you?

Variable, fairly small at times but in exposed locations gusts affecting comfortable walking and stability.

How Wet?

Risk showers, perhaps with thunder

Possible thundery and at times heavy showers, risk highest toward the south.

Cloud on the hills?

Hills partly in cloud

Cloud covering the hills toward the south, on Snowdon range except for morning mist mostly hills clear at start, perhaps getting covered during the day.

Chance of cloud free summits?

60%

Sunshine and air clarity?

Patchy sun at start, increasingly murky and dull from the southeast during the day. Haze in the air.

How Cold? (at 900m)

9 or 10C

Freezing Level

Above the summits.

Planning Outlook

High pressure conditions with a lot of sunshine, warm temperatures and calm winds continue until early next week in Scotland and northern England. In Wales and Peak District during the weekend heavy showery bursts of rain, possibly thunderstorms. On Monday clouds and brief rain in Scotland. Northern England mostly dry, Peaks and Wales still wet. On Tuesday most likely dry day, before a deep low pressure system arrives on Wednesday/Thursday, bringing strong cooling and a lot of rain to most British mountains. Toward next weekend probably cold and wet, with again some snow on high tops.