Mountain weather
Yellow warning

Yellow weather warning in force for Brecon Beacons

Brecon Beacons Mountain weather forecast table

Confidence

High for showers to develop and turn heavy for some areas, low for details on timings and locations.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.

hazard Thunderstorms
Lightning is a significant mountain hazard which can result in serious injury or death. Mountain terrain often leaves one highly exposed to lightning strikes. Hail may give unpleasant conditions with torrential rain and localised flash flooding also possible, mainly in Summer months.

hazard Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.

Mountain weather forecast

Changeable with heavy and thundery showers. Easing from most hills during the late afternoon and evening.

06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 600m)
Light rain Sunny intervals Light rain Heavy shower (day) Sunny intervals Cloudy
Chance of precipitation
(at 600m)
40% 40% 30% 30% 30% 30%

Wind direction and speed (mph)
Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m S
12
SW
11
W
11
W
7
W
9
W
9
300m S
5
SW
7
W
8
W
7
W
6
W
5
Valley E
2
SW
6
W
7
W
7
W
6
W
5
Wind gust (mph)
Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m 15 14 15 11 13 13
300m 11 12 14 13 12 13
Valley 6 11 15 13 13 13

Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m
11°
11°
10°
300m
10°
12°
13°
13°
12°
11°
Valley
11°
13°
14°
14°
13°
11°
Freezing Level
1,900m
1,900m
2,000m
2,000m
2,000m
2,000m

Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m
300m
11°
12°
12°
11°
10°
Valley
11°
12°
12°
13°
12°
10°

Additional weather information

Meteorologist's view

Waterproof clothing is recommended for much of the day, there is also a risk of thunderstorms in any of the heavy showers that occur, when these happen it is recommended to stay away from exposed ground and steep slopes.

Weather

Likely a wet start to the day with heavy and possibly thundery showers persisting for much of the morning. During the afternoon these become less likely with gaps in the cloud more likely, and some sunny spells developing, especially in the west. Still a risk of showers during the evening.

Chance of cloud-free hill tops

40% becoming 80% by midday

Low cloud and visibility

Cloud obscuring hills above 500m, mainly during the heaviest showers through the morning. Generally lifting, but some cloud lingering on tops above 700m. Visibility will deteriorate rapidly to become poor in any showers, especially during the morning.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
1.2mm9.4mm16.4mm
Measurement date:

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.

Sunrise:
Sunset:

Mountain weather information

Weather

A cloudy start for western slopes, becoming brighter through the morning with a risk of heavy showers at times. Drier in the afternoon and evening with some sunshine. Further rain will arrive during the night.

Chance of cloud-free hill tops

60% becoming 95% by mid-morning

Maximum wind speed expected

Southwesterly mean 20mph gust 30mph.

Temperature

  • At 600m Plus 13 Celsius.
  • Valley Plus 12 Celsius becoming Plus 20 Celsius.
  • Freezing level Above the summits.

Low cloud and visibility

Patchy cloud at around 400m will cover some hill tops first thing, although cloud lifting above summits through the morning. Though in any showers visibility will deteriorate temporarily with some ragged patches of cloud potentially returning to highest points.

Mountain weather information

Sat 2 Jul

Sunrise:
Sunset:

Scattered showers through the day, locally heavy, with the risk of hail and thunder at times. These easing by the evening. Temperatures near normal.

Sun 3 Jul

Sunrise:
Sunset:

Another day of sunny spells and scattered showers, locally heavy at times. Light winds. Temperatures near normal.

Mon 4 Jul

Sunrise:
Sunset:

Further sunny spells and scattered showers. The showers are likely to be lighter in nature compared to previous days. A cool northwesterly breeze. Temperatures slightly below average.

Updated at:

Summit specific forecast

Mountain summit forecast map

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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.