Brecon Beacons Forecast

Includes all higher summits in the southern half of Wales, including highest point in Preseli Hills.

Viewing Weather Forecast for Monday 23rd September 2019
Forecast last updated on Sunday 22nd September 2019 at 4:01pm

Today | Tuesday | Wednesday

Summary for all mountain areas

The remnants of several fronts will give extensive fog and patches of rain and drizzle after dawn. Conditions will slowly improve: most rain will die out and generally cloud base progressively rise. Wales, after a lull to some sun will deteriorate quickly from SW afternoon.

Headline for Brecon Beacons

Deteriorating afternoon: upland gales, rain and low cloud.

How windy? (On the summits)

Southwesterly 20mph for several hours after dawn. Will then back southerly and strengthen quickly to 45mph.

Effect of wind on you?

Small most of morning - but quickly increasingly difficult walking conditions afternoon.

How Wet? (Precipitation and its impact)

Rain later in day

Rain setting in from southwest early to mid afternoon.

Cloud on the hills?

Clearing for a few hours, but forming quickly in rain

Higher tops becoming cloud free by mid morning before fog forms widely on the hills in rain in afternoon. The cloud base will drop to near 350m on southern hills west from the Brecon Beacons.

Chance of cloud free summits?

90% for several hours; decreasing quickly to 20% afternoon

Air clarity (below cloud)

Sunshine will give way as high level cloud thickens in afternoon. Visibility excellent - but becoming widely poor in rain into the afternoon.

How Cold? (at 750m)


Freezing Level

Above the summits.

Planning Outlook

All mountain areas of Britain from Tuesday 24th September 2019

Low pressure will dominate the weather all week, bringing frequent rain and low cloud, and intermittently strong upland winds. As several areas of low pressure track across the country, the weather pattern will often be complicated, making day to day local detail difficult to forecast. However, there remains strong evidence that the driest area will be areas near and north of the Great Glen.

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