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 Tue 2nd Mar 21 at 3:50PM Last Updated Tuesday 2nd March 2021 at 3:50PM
View our low-graphics version Last Updated Tue 2nd Mar 21 at 3:50PM Last Updated Tuesday 2nd March 2021 at 3:50PM

Viewing Forecast For

Snowdonia National Park
Wednesday 3rd March 2021
Last updated Tuesday 2nd March 2021 at 3:50 PM

Summary for all mountain areas

Most mountains remain clear and sunny above an inversion, whilst low level cloud or fog will thin only slowly in some areas, focused toward the east, leaving low level haze. Very little wind overall. In south Wales, risk localised bursts of rain occurring.

Headline for Snowdonia National Park

Little wind. Areas of low cloud/fog and mostly weak sun.

How windy? (On the summits)

Direction varying, little wind; 5mph or less.

Effect of the wind on you?

Negligible.

How Wet?

Mostly dry, risk isolated patches of rain.

Risk of isolated patches of rain moving from the south.

Cloud on the hills?

Banks at varying heights likely to clear

Some banks of low cloud and fog at varying heights from dawn, tending to break up to leave ragged patches. High tops may be clear, and many hills may generally clear.

Chance of cloud free summits?

40% rising to 80%

Sunshine and air clarity?

Mostly cloudy, but some hazy sun possibly breaking through at times. Visibility suppressed lower down by fog or low level haze. May well be excellent on high tops.

How Cold? (at 900m)

4C

Freezing Level

Above the summits.

Viewing Forecast For

Snowdonia National Park
Thursday 4th March 2021
Last updated Tuesday 2nd March 2021 at 3:50 PM

How windy? (On the summits)

Northeasterly, 10 to 20mph, tending to strengthen later.

Effect of the wind on you?

Fairly small, but toward dusk likely to bring marked wind chill.

How Wet?

Little or no precipitation

Chance of an isolated light shower, mainly later in the day, turning to snow above 600m.

Cloud on the hills?

Varied, some breaks

May vary: from dawn, banks of cloud at various levels over the hills, with some breaks forming mostly toward west coast. Cloud may come and go on higher slopes, rarely below 600-700m by middle of day onward.

Chance of cloud free summits?

40%

Sunshine and air clarity?

Patches of sun, best toward west. Visibility very good.

How Cold? (at 900m)

3C, but likely falling toward 0 or -1C through daytime.

Freezing Level

Starting above the summits, but by late afternoon likely to lower toward 800m.

Viewing Forecast For

Snowdonia National Park
Friday 5th March 2021
Last updated Tuesday 2nd March 2021 at 3:50 PM

How windy? (On the summits)

Easterly 20 to 25mph, speeds likely to lessen through day.

Effect of the wind on you?

A distinct chill in exposure for at least part of the day.

How Wet?

Precipitation not expected

Cloud on the hills?

Little if any

Rare patches some higher slopes.

Chance of cloud free summits?

80%

Sunshine and air clarity?

Frequently sunny. Excellent visibility.

How Cold? (at 900m)

-4C rising slowly to -2C.

Freezing Level

Frost into most valleys at dawn; rising toward 700m by afternoon.

Planning Outlook

High pressure will dominate through to the weekend and substantially dry conditions prevail. Much colder air arrives from the north for a few days - dropping several degrees below freezing on higher mountains. Also notably harder frosts in most glens and valleys late this week. Gradual changes are likely over the weekend, becoming generally unsettled next week as westerly winds return, with precipitation then becoming frequent again. Temperatures are likely to vary next week, but perhaps often chilly with some upland snowfalls likely; periods of gales returning.