Eryri / Snowdonia National Park

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

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Viewing Forecast For

Eryri / Snowdonia National Park
Thursday 25th July 2024
Last updated Wed 24th Jul 24 at 4:31PM

Summary for all mountain areas

Humid air coming in off the Atlantic will bring extensive low cloud, although by afternoon well inland (from south to west facing coasts), cloud base will have risen. Pockets of drizzly rain, mainly western highlands of Scotland, perhaps most pronounced later in the day. Blustery higher tops toward NW Highlands.

Headline for Eryri / Snowdonia National Park

Isolated drizzle.

How windy? (On the summits)

Southwesterly, 20mph, perhaps locally 30mph.

Effect of the wind on you?

Mostly fairly small

How Wet?

Pockets of drizzle west

A few pockets of drizzle western hills.

Cloud on the hills?

Extensive on higher areas

Fog across the hills from dawn, the lowest cloud base across west Wales. Will improve, by midday typically cloud base 800m or above east Wales and probably Carneddau and Tryfan, whilst 600m or lower elsewhere (lowest, often below 300m western slopes of Snowdon to Lleyn peninsula).

Chance of cloud free summits?

10% rising to 30%

Sunshine and air clarity?

Pockets of sunshine coming through, mainly lower slopes east Wales and near/north of A5. Excellent visibility, but dropping in rain.

How Cold? (at 900m)

10C to in east Wales 13C afternoon

Freezing Level

Above the summits

Viewing Forecast For

Eryri / Snowdonia National Park
Friday 26th July 2024
Last updated Wed 24th Jul 24 at 4:31PM

How windy? (On the summits)

West to southwesterly 15-20mph, gusts exceeding 30mph locally Snowdon range.

Effect of the wind on you?

Fairly small, occasionally gusty which may affect balance on exposed ridges.

How Wet?

Little rain locally

Dry toward the east, chance for brief light rain on the western hills, particularly west of Blaenau Ffestiniog.

Cloud on the hills?

Morning low cloud, later partly clearing

Fog or low cloud in the morning, lifting, clearing hills in east Wales. Further west, cloud base may not rise above 750 to 900m, and between western slopes of Snowdon and Lleyn peninsula may be substantially lower.

Chance of cloud free summits?

30%

Sunshine and air clarity?

Patches of sun coming through, particularly afternoon. Visibility very good; haze in the air near west coast.

How Cold? (at 900m)

8 to 10C

Freezing Level

Above the summits

Viewing Forecast For

Eryri / Snowdonia National Park
Saturday 27th July 2024
Last updated Wed 24th Jul 24 at 4:31PM

How windy? (On the summits)

Southwest turning westerly, 10 to 20mph, perhaps 25mph, strongest in the afternoon toward mid-Wales

Effect of the wind on you?

Small, but noticeable in the east, may be annoyingly gusty there.

How Wet?

Showery rain in places

Risk of showers, highest in Meirionnydd, here possibly persistent for some hours. Most likely dry toward mid-Wales, but showers not fully ruled out also there.

Cloud on the hills?

Misty start, mostly clear by midday

Patches of clouds on various levels in the morning, soon breaking, widely clearing the hills by midday. Highest tops may see clouds coming and going in the afternoon.

Chance of cloud free summits?

Rising to 60% by midday

Sunshine and air clarity?

Little sun on coastal hills, bright or sunny spells toward mid-Wales. Visibility good, very good in the east.

How Cold? (at 900m)

8 to 12C

Freezing Level

Above the summits

Planning Outlook

Continued winds from the southwest will bring low cloud and intermittent rain, focussed on the NW Highlands and perhaps Lochaber. Away from these areas, total rainfall will be small. Little change in temperature. Wind sped fairly light, although sometimes blustery NW Scotland.