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Brecon Beacons - Mountain weather forecast

Weather warnings

Warnings affecting Brecon Beacons over the next 5 days

Confidence

High for poor conditions at times Tuesday onwards, but lower for rainfall detail.

  • This evening
  • Monday
  • Tuesday
  • Further outlook

Sunday 25 June 2017

Sunset: 21:37
Moon phase: New

Becoming dry with clear periods developing.

Monday 26 June 2017

Weather hazards

Strong sunlight Medium likelihood Show less detail

Strong sunlight has a heightened effect at altitude with a higher risk of sunburn and eye damage. High temperatures, especially when combined with high humidity, may lead to heat stroke or heat exhaustion. Snow-covered terrain will increase the effect of harmful UV rays, especially on the eyes. It is advisable to wear sun block and good quality eye-protection even on overcast days.

Learn more about strong sunlight

Forecast

Mostly dry and bright. Some patchy evening rain possible.

Weather

0000 0300 0600 0900 1200 1500 1800 2100
Weather at 600m Clear night Sunny day Sunny intervals Cloudy Cloudy Cloudy Cloudy Cloudy
Chance of precipitation at 600m 00% 00% 00% 00% 00% 00% 10% 20%

Wind speed and direction

0000 0300 0600 0900 1200 1500 1800 2100
Altitude above mean sea level
600m W 5 7 SW 3 4 S 2 4 S 5 8 S 5 9 S 7 12 SW 7 10 SE 8 11
300m SW 3 5 SW 2 4 E 1 3 SE 2 6 SE 3 8 S 5 10 SW 4 8 S 3 7
Valley W 3 6 SW 3 5 E 2 3 SE 2 6 SE 3 7 S 4 10 S 4 7 S 3 6

Temperature

0000 0300 0600 0900 1200 1500 1800 2100
Altitude above mean sea level
600m 9 ° 9 ° 9 ° 11 ° 14 ° 15 ° 15 ° 13 °
300m 10 ° 9 ° 11 ° 14 ° 17 ° 18 ° 17 ° 15 °
Valley 11 ° 10 ° 11 ° 15 ° 17 ° 19 ° 18 ° 16 °

Feels like temperature

0000 0300 0600 0900 1200 1500 1800 2100
Altitude above mean sea level
600m 8 ° 8 ° 9 ° 11 ° 13 ° 13 ° 14 ° 12 °
300m 10 ° 9 ° 11 ° 14 ° 17 ° 17 ° 17 ° 15 °
Valley 10 ° 9 ° 11 ° 15 ° 17 ° 18 ° 18 ° 16 °

Freezing level

0000 0300 0600 0900 1200 1500 1800 2100
Freezing level i 3,100 m 3,100 m 3,200 m 3,100 m 3,100 m 3,200 m 3,300 m 3,300 m
Sunrise: 04:56
Sunset: 21:37
Moon phase: New

Weather

A dry morning with some sunshine, becoming cloudier through the afternoon with some patchy rain likely to reach the park from the west by midnight.

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

90%.

Visibility

Mostly good.

Meteorologist's view

Nothing to add.

Recent rainfall

  • Location: Neuadd Rain (Near Pontsticill)
  • Altitude: 353m
  • Measurement date: 15:00 on Sun 25 Jun 2017
  • Last 24 hours: 1.8mm
  • Last 48 hours: 6.4mm
  • Last 72 hours: 6.4mm

Rainfall data provided by the Environment Agency. The Met Office is not responsible for content provided by third parties and may remove this data without warning.

Tuesday 27 June 2017

Sunrise: 04:56
Sunset: 21:37
Moon phase: Waxing crescent

Weather

Patchy rain likely at first with some occasional patches of cloud across highest southt facing hill tops. Perhaps brighter into the afternoon, but with a risk of a few heavy showers.

Temperature

  • At 600m Plus 12.
  • Valley Plus 12 rising to Plus 19.
  • Freezing level Well above summits.

Visibility

Patches of cloud above 500 metres at first, more especially on south facing hills, may give navigational difficulties. Cloud bases should rise a little into the afternoon, giving mostly good visibility, although this may decrease to a few kilometres for short periods in any heavy showers.

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

20% at first, perhaps 60% by afternoon.

Maximum wind speed expected

Southerly 15-20 mph, gusts 25 mph.

Wednesday 28 June 2017

Sunrise: 04:57
Sunset: 21:37
Moon phase: Waxing crescent

A further period of heavy and persistent rain is likely, with extensive cloud across the hills. However, currently there is considerable uncertainty regarding detail.

Thursday 29 June 2017

Sunrise: 04:57
Sunset: 21:37
Moon phase: Waxing crescent

Probably brighter but with a risk of occasional heavy showers.

Friday 30 June 2017

Sunrise: 04:58
Sunset: 21:37
Moon phase: Waxing crescent

Further heavy showers or perhaps longer spells of rain likely with stronger northwest winds.

Issued at:

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.