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Updated: 0557 on Wed 23 Jul 2014
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Brecon Beacons: forecast weather

Wednesday, 23 July 2014: dawn to dusk

Printable view Forecast issued: 0342 on Wednesday, 23 July 2014

Overview for Wednesday

Early cloud clearing to leave plenty of sunshine. A risk of thundery showers later. Very warm or hot.

Hazards Risk Explanation
Blizzards No Risk  
Heavy snow No Risk  
Storm force winds No Risk  
Gales No Risk  
Severe chill effect No Risk  
Persistent and extensive hill fog Low Occasional around 300m, especially over eastern slopes.
Thunderstorms Medium Thundery showers may develop in the afternoon.
Heavy persistent rain Low Heavy rain possible for a time as showers move through.
Strong Sunlight High Long sunny spells and high UV levels bring a risk of sunburn.

key to hazards and forecast content

Weather summary and probability of precipitation for Wednesday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
Sunny intervals
Sunny intervals
Sunny intervals
Sunny intervals
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0% 0% 0% 30%

Detailed mountain weather forecast: Brecon Beacons

Wednesday

Weather

Low cloud at first will soon lift and clear during the morning to leave plenty of sunny spells and becoming very warm or locally hot, with a high risk of sunburn. Cloud bubbling up in the afternoon, to bring a risk of isolated thundery showers for a time towards evening. Any showers will fade during the evening to leave a dry start to the night.

Visibility

Generally very good, but very poor in early hill fog and also becoming moderate or poor in heavy showers later.

Hill fog

Occasional around 300m around dawn, especially over eastern slopes, but this soon clearing to leave summits cloud free.

Maximum winds above 400m

Easterly 30mph.

Temperature

Valleys Plus 14, rising to plus 27 Celsius.
800 m Plus 15, rising to plus 17 Celsius.
Freezing level Well above the summits.

Thursday

Weather

Dry overnight with long clear spells but also some patchy low cloud, this more likely towards dawn and in the east. Another bright and very warm day will follow with long sunny spells once any patchy low cloud clears. Many places will remain dry, but showers are likely to develop with some heavy and perhaps thundery downpours possible.

Visibility

Generally very good, but poor or very poor in any hill fog. Moderate or poor in any heavy showers.

Hill fog

Occasional patches around 400m, these soon burning off to leave summits clear of cloud.

Maximum winds above 400m

Southeasterly 30mph.

Temperature

Valleys Plus 14, rising to plus 26 Celsius.
800 m Plus 17 Celsius.
Freezing level Well above the summits.

Outlook

Friday

A few mist and hill fog patches initially, then a bright morning with sunny spells. There is a risk of scattered showers developing by afternoon once again, some of these may turn heavy and become slow-moving with just a light easterly breeze. It will feel very warm on the slopes, with high UV levels bringing a high risk of sunburn.

Saturday

Any early mist and fog patches soon lifting to allow good sunny spells and a few showers. The showers should be lighter than recently. Winds will be light northeasterly making it feel a little cooler than past days, but still warm.

Sunday

There is likely to be more cloud than of late, but still with a good deal of dry weather and sunny spells. During the afternoon there will be an increasing risk of showers, perhaps the odd heavy one. Light to moderate northeasterly winds.

Neuadd Rain (near Pontsticill)

Altitude 353 metres

Rainfall measured at 03:00 Wednesday, 23 July 2014

  • Last 24 hours 0.0 mm
  • Last 48 hours 0.0 mm
  • Last 72 hours 0.0 mm

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.

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Weather warnings for Wales

Weather forecast for Wales

The Enhanced Mountain forecast for Brecon Beacons has been discontinued. All forecast information for these locations can be found in the standard Mountain forecast above.

North East England West Midlands Grampian South West England Central, Tayside & Fife Northern Ireland North West England East of England Highlands & Eilean Siar Strathclyde Wales East Midlands SW Scotland, Lothian Borders London & South East England Yorkshire & Humber

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