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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 Mon 8th Mar 21 at 3:36PM Last Updated Monday 8th March 2021 at 3:36PM
View our low-graphics version Last Updated Mon 8th Mar 21 at 3:36PM Last Updated Monday 8th March 2021 at 3:36PM

Viewing Forecast For

Brecon Beacons
Tuesday 9th March 2021
Last updated Monday 8th March 2021 at 3:36 PM

Summary for all mountain areas

A weak front moves away northeast, with early areas of rain tending to break up and clear. Low cloud may persist around western mountains of Britain. Southerly winds strengthening later ahead of heavy rain setting in by evening into night, soonest in western Scotland.

Headline for Brecon Beacons

A little rain. Wind increasing to gales by late evening.

How windy? (On the summits)

Southwesterly 15 to 25mph; will increase toward or after dusk to 30-40mph; strongest in far west. Reaching 50-60mph into evening and night.

Effect of the wind on you?

May impede walking at times across higher slopes; later in the day becoming fairly arduous. Deteriorating further from sunset.

How Wet?

Occasional showers.

A scattering of showers, most of which will be in the morning. May leave residual drizzly showers on western hills where low cloud persists. Heavy rain arriving into night.

Cloud on the hills?

Fairly extensive tops.

Cloud likely shrouding tops fairly extensively above 700-900m, lowest in west; especially in and around showers. Some occasional breaks; mostly occurring in the afternoon toward the Black Mountains.

Chance of cloud free summits?

40%

Sunshine and air clarity?

Often cloudy, but some patches of sun here and there. Visibility often very good, but poor in rain.

How Cold? (at 750m)

3C

Freezing Level

Above the summits.

Viewing Forecast For

Brecon Beacons
Wednesday 10th March 2021
Last updated Monday 8th March 2021 at 3:36 PM

How windy? (On the summits)

Uncertainty: Southwest 25 to 40mph, perhaps easing briefly. Through afternoon, widespread upland gales developing.

Effect of the wind on you?

Will impede walking across higher slopes in morning, perhaps at times arduous. Becoming widely difficult in afternoon.

How Wet?

Rain most of the day

Frequent rainfall through the day, rarely fully ceasing Brecon Beacons NP and western hills elsewhere, at times heavy for several hours. However, may be a lull in rain for a few hours.

Cloud on the hills?

Extensive

Cloud will very likely cover the hills extensively in fog; down to lower slopes across western areas.

Chance of cloud free summits?

20%

Sunshine and air clarity?

Overcast. Visibility often poor due to rain.

How Cold? (at 750m)

3C lifting to 6C

Freezing Level

Above the summits.

Viewing Forecast For

Brecon Beacons
Thursday 11th March 2021
Last updated Monday 8th March 2021 at 3:36 PM

How windy? (On the summits)

West or southwesterly, 40 to 60mph, risk 80mph for a time around dawn.

Effect of the wind on you?

Difficult conditions across higher terrain through the day. Significant wind chill.

How Wet?

Frequent hail or snow

Heavy overnight rain. Then clusters of showers coming in from the west, locally very frequent for periods. Hail, and snow at times falling below 600m. Risk isolated thunder.

Cloud on the hills?

Varied, mostly higher tops

Cloud bases changing quickly between showers: mostly confined to higher tops above 700-800m. Patches forming below 600m in showers, perhaps more widely at first and on western Cambrian Mountains.

Chance of cloud free summits?

40%

Sunshine and air clarity?

Bursts of sun away from showers. Sometimes very good visibility, but suddenly reduced by showers.

How Cold? (at 750m)

0C, perhaps a few degrees higher just at first.

Freezing Level

Lowering to around 800m.

Planning Outlook

Very unsettled through the middle of this week as a series of low pressure systems move to the north of Britain. Persistent gale force winds across the mountains, stormy at times. Heavy rain will make western areas very wet underfoot. Temperatures falling below freezing on higher mountains, particularly by Thursday, resulting in some fresh snow accumulations on tops. Heavy showers will also contain hail and a risk of thunder. Scottish mountains likely to stay sub-zero into the weekend, with some freeze and thaw cycles elsewhere. Into next week, indications favour an improvement from the south as high pressure rebuilds.