Mountain weather

Brecon Beacons

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Brecon Beacons Mountain weather forecast table

Confidence

High for changeable conditions into mid-week, with rainfall amounts not expected to be high. Lower confidence for timings of rainfall and cloud detail thereafter.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

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

hazard Poor visibility
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.

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

Bright or sunny spells and isolated showers giving way to outbreaks of rain and drizzle late in the evening.

Wind direction and speed (mph)
Altitude above mean sea level
Wind gust (mph)
Altitude above mean sea level

Altitude above mean sea level

Altitude above mean sea level

Additional weather information

Meteorologist's view

Nothing to add.

Weather

Often cloudy but mainly dry during the early hours. Bright or sunny spells and isolated light showers through the morning, with the showers fading away during the afternoon. Clouding over during the evening, with outbreaks of light rain and drizzle spreading from the west before midnight.

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

20% at first with periods of cloud around 500m then improving to 80% by mid-morning as cloud lifts and breaks to small amounts near 800m. Deteriorating to 10% or less through the evening as extensive cloud develops near 400m.

Visibility

Generally good or very good with clear views of distant hills, and with only temporary brief deteriorations in any passing showers. Becoming moderate or poor in rain and drizzle later, with views of even nearby hills becoming indistinct, and very poor over higher routes.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
3.8mm3.8mm3.8mm
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

Cloudy with outbreaks of mainly light rain and drizzle throughout the morning and at first in the afternoon, but becoming drier and brighter late afternoon onwards, although exposed western parts of the Beacons are likely to cloud over again in the evening.

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

10% or less during the morning with extensive cloud above 400m. Improving to 70% late afternoon into early evening as cloud lifts and breaks to near 800-900m, but deteriorating to 40% later in the evening as periods of cloud develop close to 600m, especially in the west.

Maximum wind speed expected

West-northwest 15-20mph with occasional gusts 25mph over the summits.

Temperature

  • At 600m Plus 10 Celsius.
  • Valley Plus 10 Celsius becoming Plus 16 Celsius.
  • Freezing level Above the summits.

Visibility

Generally moderate or poor through the morning and very poor over the higher routes, but becoming generally good at low levels as drier conditions develop late afternoon onwards, with some clear views of hills up to 15km away.

Mountain weather information

Thursday 16 July

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Sunset:

Mainly dry if rather cloudy, with the best of any bright or sunny spells in the east. Moderate west to northwest winds.

Friday 17 July

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Sunset:

Cloudy at times, but dry with the best of the bright or sunny spells again in eastern shelter. Light west to northwest winds.

Saturday 18 July

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Sunset:

Cloudy with occasional light rain, especially in the west. Moderate west to southwest winds.

Updated at:

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.