Snowdonia National Park

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

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Viewing Forecast For

Snowdonia National Park
Monday 2nd August 2021
Last updated Sun 1st Aug 21 at 4:10PM

Summary for all mountain areas

Dry and bright for most places. Quite cool, but light winds. A fair amount of cloud in the sky, although most summits often clear. Patches on some higher slopes in morning. One or two showers for the Pennines and Wales, locally a heavy burst in S & E Wales.

Headline for Snowdonia National Park

Risk of local showers. Many tops clear or clearing.

How windy? (On the summits)

Westerly or variable, 10mph or less, occasionally 15mph near coast.

Effect of the wind on you?

Small

How Wet?

Local showers developing

Many places dry. One or two likely to form inland and drift around slowly, locally the odd heavy burst across east and mid-Wales during the afternoon.

Cloud on the hills?

Mostly higher tops

Banks of cloud on higher slopes for time, may come and go for a few hours.

Chance of cloud free summits?

80%

Sunshine and air clarity?

Fairly cloudy, some sun mostly morning, then near coasts later afternoon. Visibility often very good, locally poor where showers form.

How Cold? (at 900m)

7 or 8C

Freezing Level

Above the summits.

Viewing Forecast For

Snowdonia National Park
Tuesday 3rd August 2021
Last updated Sun 1st Aug 21 at 4:10PM

How windy? (On the summits)

South to southwesterly 10 to 15mph or less, may strengthen a little near west coast.

Effect of the wind on you?

Small

How Wet?

Chance of a shower

Perhaps an isolated shower mainly middle of day into afternoon.

Cloud on the hills?

Lifting toward many tops

Banks of cloud most persistent near west coast in the morning, below 600-700m for a time, tending to break in afternoon. Inland and north of the A5, early patches lifting above 800m with good breaks toward Berwyn Mountains.

Chance of cloud free summits?

30% rising to 70%

Sunshine and air clarity?

Mostly cloudy skies, glimpses of sun. Visibility very good below cloud.

How Cold? (at 900m)

7 or 8C

Freezing Level

Above the summits

Viewing Forecast For

Snowdonia National Park
Wednesday 4th August 2021
Last updated Sun 1st Aug 21 at 4:10PM

How windy? (On the summits)

Southerly 15mph, likely strengthening through day to 25-30mph, risk reaching 40mph by evening or night.

Effect of the wind on you?

Starting small, but becoming increasingly blustery, risk deteriorating to give arduous conditions later.

How Wet?

Occasional rain

Pulses of rain drifting northeastwards, risk fairly persistent over a few hours west Wales, otherwise may be patchy in nature, but the odd heavy burst possible.

Cloud on the hills?

Fairly persistent western summits

Lowest and most persistent cloud focused on coastal mountains, at times may form to lower slopes around Llyn Peninsula. Likely to linger all day on higher tops, but north and east from the A5 some breaks above 800m.

Chance of cloud free summits?

20% near coast, 60% toward north/east.

Sunshine and air clarity?

Mostly cloudy, often murky west Wales, but brighter toward east where visibility good below cloud.

How Cold? (at 900m)

8 to 10C

Freezing Level

Above the summits

Planning Outlook

A relatively quiet start to the week, but expect local showers or patchy rain. Lowering pressure Wednesday into Thursday then leads to an unsettled end to the week. Widespread rain and heavy showers, some thundery downpours. The most sustained rain likely focused on England & Wales. Windier too, the strongest winds expected across southern Britain, where gales are possible at times Thursday-Friday. A little warmer through midweek, but no imminent return to hot weather. Likely staying generally unsettled through the weekend as low pressure continues to influence Britain.