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Updated: 1005 on Tue 19 Mar 2013
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Brecon Beacons: latest infra-red satellite

Wednesday, 27 August 2014: dawn to dusk

Printable view Forecast issued: 1652 on Wednesday, 27 August 2014

Overview for Thursday

Showery rain soon moving eastwards across the park, but drier and brighter by afternoon. Windy, with gales.

Hazards Risk Explanation
Blizzards No Risk  
Heavy snow No Risk  
Storm force winds No Risk  
Gales Medium Southwesterly winds could reach mean speeds of 40mph, with gusts to around 50mph by late evening.
Severe chill effect Low Feeling closer to 5C in exposure to the gale force southwesterly winds.
Persistent and extensive hill fog Medium Low cloud bases are expected at times throughout the morning.
Thunderstorms No Risk  
Heavy persistent rain No Risk  
Strong Sunlight Low Moderate UV levels during the afternoon.

key to hazards and forecast content

Weather summary and probability of precipitation for Thursday
Dawn to 0900 0900 to 1200 1200 to 1500 1500 to dusk
Cloudy
Cloudy
rain
rain
Sunny intervals
Sunny intervals
Light rain showers
Light rain showers
40% 10% 30% 50-70%

Detailed mountain weather forecast: Brecon Beacons

Thursday

Weather

Outbreaks of rain will soon clear away after midnight, with cloud lifting and breaking for a time. It will turn cloudier again during the morning however as a band of showery rain pushes eastwards across Wales, with some heavier downpours and strong gusts likely in association. The afternoon will be much improved though, with dry and bright weather and a few spells of sunshine to end the day. It will be rather breezy throughout, especially over exposed ridges and summits.

Visibility

Good becoming very good, although temporarily reducing to moderate or poor during showers. Poor in any hill fog.

Hill fog

Bases 500-700 metres fairly widely at first, with a few patches down to 200 metres in the southeast. This soon breaking and mostly lifting above the summits, however further fog will spread eastwards across hills above 500 metres as showery rain arrives by mid-morning. Generally nil by the afternoon.

Maximum winds above 400m

Southwesterly 25-30mph with gusts 35-40mph near any showers. Increasing to mean 35-40mph with gusts 45-50mph later in the evening.

Temperature

Valleys Plus 10 becoming 19 Celsius.
800 m Plus 11 Celsius.
Freezing level Above the summits.

Friday

Weather

Remaining unsettled and windy with scattered blustery showers. Some of these may turn thundery or merge into longer spells of rain. Hill fog is likely to be rather extensive during the afternoon, and gales are expected to develop during the morning leading to a significant chill effect.

Visibility

Very good, but reducing to moderate or poor in showers. Very poor in hill fog.

Hill fog

A few patches of fog above 700 metres during the early morning. Then nil for a time until mid-afternoon, when bases will fall to 400-600 metres widely.

Maximum winds above 400m

Southwesterly 30-35mph with gusts 45-50mph, gradually veering westerly and easing a little during the evening.

Temperature

Valleys Plus 12 becoming 18 Celsius.
800 m Plus 11 Celsius.
Freezing level Above the summits.

Outlook

Saturday

A brighter day than of late with sunny spells and a scattering of showers. The showers may ease from the west later in the day. Westerly winds will be much lighter than on Friday, although perhaps still gusty at times near showers.

Sunday

Cool, dry and largely clear overnight, then staying mostly dry with bright or sunny spells during the day. There's a chance of a few showers, but these only light. It will be windy at first, but easing later.

Monday

Rather cloudy with some patchy light rain possible. Brighter or clearer conditions are likely towards the end of the day. Light to moderate winds. Hill fog at times.

Neuadd Rain (near Pontsticill)

Altitude 353 metres

Rainfall measured at 15:00 Wednesday, 27 August 2014

  • Last 24 hours 0.4 mm
  • Last 48 hours 8.4 mm
  • Last 72 hours 22.2 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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