Mountain Weather
Information Service
Brecon Beacons Forecast

Brecon Beacons

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

Click here to download the latest PDF Last Updated Tue 22nd Sep 20 at 4:20PM Last Updated Tuesday 22nd September 2020 at 4:20PM
View our low-graphics version Last Updated Tue 22nd Sep 20 at 4:20PM Last Updated Tuesday 22nd September 2020 at 4:20PM

Viewing Forecast For

Brecon Beacons
Wednesday 23rd September 2020
Last updated Tuesday 22nd September 2020 at 4:20 PM

Summary for all mountain areas

In Scotland, many places dry, but a few showers moving around slowly, of snow on higher summits. Chilly, but winds light. A complex front drifts east across England & Wales - rain may well largely clear, but risk of showers following, may cluster together.

Headline for Brecon Beacons

Cool. Risk a few showers. Wind mostly light.

How windy? (On the summits)

Variable, may be mostly northerly, 10 to 20mph.

Effect of the wind on you?

Mostly small, but feeling chilly where exposed on tops.

How Wet?

Rain then risk of showers

Rain from before dawn likely to clear eastwards early morning, to leave frequently dry conditions. However, risk local clusters of showers forming with possible hail.

Cloud on the hills?

Lifting away from rain

Fairly extensive cloud from dawn, becoming gradually confined to higher slopes and some breaks forming to many tops. Patches below 600m around showers.

Chance of cloud free summits?

30% rising to 70%

Sunshine and air clarity?

Cloud layers breaking up periodically to give sunshine. Visibility soon mostly excellent, but reduced around rain.

How Cold? (at 750m)

6C

Freezing Level

Above the summits.

Viewing Forecast For

Brecon Beacons
Thursday 24th September 2020
Last updated Tuesday 22nd September 2020 at 4:20 PM

How windy? (On the summits)

Some uncertainty: Mostly south or southwesterly, 20 to 30mph, but risk up to 40mph for periods.

Effect of the wind on you?

Risk often blustery and significant wind chill on higher areas, sometimes arduous conditions.

How Wet?

Frequent heavy rain

Pulses of heavy rain are expected to rotate in from the southwest across Wales through the day. Some sustained heavy bursts. Risk of hail and thunder. Intermittently dry east Wales.

Cloud on the hills?

Extensive in rain

Where rain persists, cloud shrouding hills for many hours, but away from rain in eastern areas, breaks occasionally to higher tops.

Chance of cloud free summits?

50%

Sunshine and air clarity?

Mostly cloudy, any sun weak through layers of high cloud. Visibility very good away from rain, but poor if rain sets in.

How Cold? (at 750m)

4C.

Freezing Level

Above the summits.

Viewing Forecast For

Brecon Beacons
Friday 25th September 2020
Last updated Tuesday 22nd September 2020 at 4:20 PM

How windy? (On the summits)

North to northwesterly, 20 to 30mph, may reach 40-45mph for a time.

Effect of the wind on you?

Considerable buffeting at times on higher terrain; significant wind chill.

How Wet?

Isolated showers

Risk of isolated brief showers, with hail. Locally may run in across Pembrokeshire in a band for an hour or more.

Cloud on the hills?

Mostly very little

Patches covering some slopes in morning, but soon breaking above higher summits. Forming locally on higher slopes where showers occur.

Chance of cloud free summits?

70%

Sunshine and air clarity?

Frequent bright sunshine. Excellent visibility.

How Cold? (at 750m)

3 to 5C.

Freezing Level

Above the summits.

Planning Outlook

Generally chilly into the weekend with higher mountains near or just below freezing point, and overnight frost in many valleys, notable early-season low temperatures Highland glens. A complex low pivots eastwards on Thursday - rain focused across England, Wales & southern Scotland. Strong northerly winds follow on Friday with scattered hail showers, snow on the Munros. Pressure builds by Saturday leading to largely dry conditions and very clear air. Early next week, westerly winds are expected to return, with rain at times, low cloud and varied temperatures.