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Brecon Beacons - Mountain weather forecast

Weather warnings

Warnings affecting Brecon Beacons over the next 5 days

Confidence

High confidence for early rain to slowly die out then it will be mostly dry for the rest of the week. Confidence is lower for cloud amounts and the height of the cloud cover, as this may be problematical at times.

  • Wednesday
  • Thursday
  • Further outlook

Wednesday 14 November 2018

Weather hazards

Gales Medium likelihood Hide detail

Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.

Learn more about gales

Poor visibility Medium likelihood Show detail

Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.

Learn more about poor visibility

Severe chill effect Low likelihood Show detail

Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.

Learn more about severe chill effect

Headline

A damp start with low cloud and mist, gradually improving through the day.

Weather

06:00 09:00 12:00 15:00 18:00 21:00
Weather at 600m Cloudy Cloudy Cloudy Sunny intervals Partly cloudy night Cloudy
Chance of precipitation at 600m 40% 10% <05% <05% 00% 00%

Wind speed and direction

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m S 32 39 S 26 34 S 25 32 S 21 28 S 22 29 S 21 28
300m S 19 40 S 16 32 S 13 27 S 9 20 S 8 21 S 9 22
Valley SW 16 38 S 12 29 S 10 24 S 6 17 S 6 18 S 6 19

Temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m 7 ° 7 ° 8 ° 8 ° 7 ° 7 °
300m 9 ° 10 ° 11 ° 11 ° 9 ° 8 °
Valley 10 ° 11 ° 12 ° 12 ° 9 ° 9 °

Feels like temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m 2 ° 2 ° 4 ° 4 ° 2 ° 2 °
300m 6 ° 7 ° 9 ° 9 ° 6 ° 6 °
Valley 7 ° 8 ° 10 ° 10 ° 8 ° 7 °

Freezing level

06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 2,600 m 2,300 m 2,000 m 1,500 m 1,400 m 1,300 m
Sunrise: 07:31
Sunset: 16:25
Moon phase: First quarter

Weather

Cloudy overnight with perhaps some patchy light rain for a time. Cloudy at first with some light rain at times but soon dying out and becoming dry. The cloud thinning and breaking up with a few sunny intervals. Low cloud forming through the evening and turning misty later.

Chance of cloud-free mountain/hill tops at 600m

Most hill tops will be shrouded in cloud at first but this will slowly lift through the afternoon although the higher hills may always remain covered. More widespread low cloud will develop through the evening with most summits becoming shrouded.

Visibility

Moderate or poor at first, slowly improving beneath the cloud cover from late morning onwards. Mostly good through the afternoon, but turning misty through the evening and becoming poor at times.

Meteorologist's view

Strongest winds in the morning but expect strong gusts across the high ground all day.

Recent rainfall

  • Location: Neuadd (Near Pontsticill)
  • Altitude: 353m
  • Measurement date: 03:00 on Wed 14 Nov 2018
  • Last 24 hours: 0.8mm
  • Last 48 hours: 8.2mm
  • Last 72 hours: 15.4mm

Rainfall data provided by Natural Resources Wales. The Met Office is not responsible for content provided by third parties and may remove this data without warning.

Thursday 15 November 2018

Sunrise: 07:32
Sunset: 16:23
Moon phase: First quarter

Weather

A dull and cloudy day with extensive mist and low cloud. Hills will be shrouded in low cloud throughout the day with fog forming in the valleys later.

Maximum wind speed expected

Southerly 15-20 mph with gusts 25 mph

Chance of cloud-free mountain/hill tops at 600m

All hill tops will be in cloud with the cloud right down to low levels especially in the evening with widespread fog likely.

Temperature

  • At 600m 8 Celsius
  • Valley 10 Celsius at first lifting to 12 Celsius
  • Freezing level Well above the summits.

Visibility

Poor or very poor with fog banks developing in the evening

Friday 16 November 2018

Sunrise: 07:34
Sunset: 16:22
Moon phase: First quarter

Extensive low cloud, fog and mist persisting through much of the day, especially on south and east facing upslopes..

Saturday 17 November 2018

Sunrise: 07:36
Sunset: 16:21
Moon phase: First quarter

Dull and misty with early fog patches. Slowly improving later in the morning and afternoon with the cloud lifting and clearing towards dusk. Very poor visibility but becoming good later.

Sunday 18 November 2018

Sunrise: 07:38
Sunset: 16:19
Moon phase: Waxing gibbous

Dry and bright with some sunny spells but occasional low cloud and mist possible, mainly in the morning on east facing upslopes..

Issued at:
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The Brecon Beacons is a mountain range in South Wales comprising six main peaks, with the highest peak, Pen y Fan, standing at 886 metres.

The summits of each peak form a long ridge with four of the peaks forming a horseshoe shape around the head of the Taf Fechan River which flows away to the south-east. The Brecon Beacons is said to be named after the ancient practice of lighting signal fires (beacons) on mountains to warn of attacks by invaders, or more recently to commemorate public and national events such as coronations or the Millennium.

For ardent mountain climbers, the Brecon Beacons National Park is among the best that Britain has to offer. While it doesn't have some of the headline-grabbing peaks of Snowdonia or the Scottish Highlands, it fits scores of slightly smaller mountains into its relatively compact 519 square mile area. These include the area's highest peak, Pen y Fan, as well as the marginally smaller Corn Du (873 metres). Both offer rather hospitable, anvil-shaped summits to those who reach the top, with plenty of space for rest and photographs, before tackling the descent.

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