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Brecon Beacons - Mountain weather forecast

Weather warnings

Warnings affecting Brecon Beacons over the next 5 days

Confidence

High for mainly dry and settled conditions through the weekend and to an increasing risk of snow next week but somewhat lower for details of any snowfall next week.

  • This evening
  • Friday
  • Saturday
  • Further outlook

Thursday 22 February 2018

Sunset: 17:40
Moon phase: First quarter

Dry and clear. Strong southeasterly winds with a significant chill effect.

Friday 23 February 2018

Weather hazards

Severe chill effect Medium likelihood Hide 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

Poor visibility Low 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

Headline

Dry and bitterly cold with long spells of sunshine. Strong southeasterly winds.

Weather

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Weather at 600m Clear night Clear night Sunny day Sunny day Sunny day Sunny day Clear night Partly cloudy night
Chance of precipitation at 600m 00% 00% 00% 00% 00% 00% 00% <05%

Wind speed and direction

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m SE 17 26 SE 16 24 SE 16 24 SE 20 29 SE 20 29 SE 17 26 E 16 25 E 19 28
300m E 6 14 E 6 13 E 7 16 E 10 21 E 12 25 E 11 24 E 9 20 E 10 23
Valley E 6 15 E 6 15 E 7 18 E 10 22 E 13 27 E 12 25 E 8 20 E 10 24

Temperature

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m -4 ° -4 ° -4 ° -3 ° -2 ° -1 ° -2 ° -3 °
300m -2 ° -3 ° -3 ° -1 ° 2 ° 2 ° 0 ° -1 °
Valley -2 ° -2 ° -2 ° 0 ° 2 ° 3 ° 1 ° -1 °

Feels like temperature

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
600m -11 ° -11 ° -11 ° -11 ° -9 ° -7 ° -8 ° -11 °
300m -6 ° -6 ° -7 ° -6 ° -3 ° -2 ° -4 ° -6 °
Valley -5 ° -6 ° -6 ° -5 ° -3 ° -1 ° -3 ° -6 °

Freezing level

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 0 m 0 m 0 m 0 m 100 m 200 m 100 m 0 m
Sunrise: 07:13
Sunset: 17:42
Moon phase: First quarter

Weather

Dry with long clear or sunny spells, these almost unbroken over western hills with rather more in the way of cloud, especially during the evening, across eastern hills.

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

Close to 100% through much of the day with little or no cloud expected below summit level but chances fall to around 40% during the evening in the east with periods of cloud above about 450m developing.

Visibility

Good or very good with distant hills rather hazy.

Meteorologist's view

Despite the dry, mainly sunny or clear conditions it will feel bitterly cold in the wind. Gusts around 40mph expected over ridges and summits.

Recent rainfall

  • Location: Neuadd (Near Pontsticill)
  • Altitude: 353m
  • Measurement date: 15:00 on Thu 22 Feb 2018
  • Last 24 hours: 0.2mm
  • Last 48 hours: 0.2mm
  • Last 72 hours: 0.2mm

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.

Saturday 24 February 2018

Sunrise: 07:11
Sunset: 17:44
Moon phase: First quarter

Weather

Another mostly dry, bitterly cold day with long clear or sunny spells. Eastern hills are likely to see rather more cloud especially during the hours of darkness, perhaps with a few light snow flurries.

Maximum wind speed expected

Southeasterly 20-25mph, with gusts around 40mph over ridges and summits, continue to bring a significant chill effect.

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

Close to 100% through the day with any cloud generally above the summits but, especially across eastern hills at first and again later, nearer 40% with periods of cloud around 450m.

Temperature

  • At 600m Around minus 3 Celsius
  • Valley Around minus 3 Celsius at dawn rising to plus 5 Celsius by day
  • Freezing level 300m or less

Visibility

Good or very good with distant hills rather hazy, perhaps falling to several kilometres in any snow flurries.

Sunday 25 February 2018

Sunrise: 07:09
Sunset: 17:46
Moon phase: First quarter

Remaining dry and bitterly cold with long clear or sunny spells. Strong easterly winds. Freezing level 300m or less.

Monday 26 February 2018

Sunrise: 07:07
Sunset: 17:48
Moon phase: Waxing gibbous

Some clear or sunny spells, especially in the west, but generally a cloudier day. Bitterly cold with an increasing risk of snow in the east. Strong easterly winds. Freezing level 300m or less.

Tuesday 27 February 2018

Sunrise: 07:05
Sunset: 17:49
Moon phase: Waxing gibbous

Bitterly cold and cloudy with outbreaks of snow. Occasionally strong northeasterly winds. Freezing level 300m or less.

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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