Mountain weather

Bannau Brycheiniog / Brecon Beacons

Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table

Confidence

High for changeable weather for the next few days

Sunrise:
Sunset:

This evening forecast

Dry and partly cloudy. Areas of low cloud down to 600 metres spreading from the west late evening.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

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

hazard Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.
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 Heavy Persistent Rain
Heavy and persistent rain can lead to drenched clothing and footwear with waterproofs often becoming soaked through, especially if accompanied by strong winds. This can lead to significant loss of body heat and an increased likelihood of hypothermia. Terrain may turn increasingly boggy underfoot while streams can flood and become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.

Mountain weather forecast

Dry, cloudy and windy. Rain by evening.

Time 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 600m)
Cloudy Cloudy Cloudy Cloudy Cloudy Heavy rain Heavy rain Partly cloudy (night)
Chance of precipitation
(at 600m)
00% 00% 00% 20% 20% 60% 60% 30%

Wind direction and speed (mph)
Altitude above mean sea level
Time 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m SW
20
SW
21
SW
22
SW
24
SW
28
SW
29
SW
29
W
27
300m SW
13
SW
15
SW
16
SW
18
SW
20
SW
22
SW
20
W
19
Valley SW
10
SW
12
SW
13
SW
16
SW
18
SW
19
SW
18
W
17
Wind gust (mph)
Altitude above mean sea level
Time 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m 28 30 32 35 41 44 43 41
300m 26 29 29 33 38 40 38 36
Valley 22 25 26 32 34 37 37 34

Altitude above mean sea level
Time 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m
300m
10°
Valley
10°
10°
10°
Freezing Level
2,300m
2,200m
1,800m
1,700m
2,000m
2,100m
1,800m
1,000m

Altitude above mean sea level
Time 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m
-3°
300m
Valley

Additional weather information

Meteorologist's view

Winds will strengthen through the day with summit gales by afternoon. Making progress will become slow will a risk of being blow over on the higher tops.

Weather

Most of the day will be dry and cloudy, a little light rain possible across the southwest of the area at times. Persistent rain will spread southeastwards from late afternoon onwards, clearing during the early evening. A few showers will follow on, turning wintry on the higher tops.

Chance of cloud-free hill tops

50%, best chance across the east of the area

Low cloud and visibility

Poor in areas of cloud down to 500 to 800 metres, lowest bases across the west of the area. Cloud more broken with higher bases towards the east.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
0mm0mm0mm
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

Variable amounts of cloud and a few passing snow or hail showers. Strong to gale, bitterly cold northwesterly winds making for severe wind chill and slow progress.

Chance of cloud-free hill tops

80%

Maximum wind speed expected

Northwesterly average speeds of 35 mph with gusts to 50 mph on the higher tops

Temperature

  • At 600m Minus 1 Celsius
  • Valley 0 rising to 6 Celsius
  • Freezing level 400 to 600 metres

Low cloud and visibility

Very good visibility with great air clarity. Some brief reductions in visibility as showers pass by. Cloud lowering to 850 metres at times otherwise cloud mostly above summits.

Mountain weather information

Thu 26 Mar

Sunrise:
Sunset:

Mainly dry, cloudy and cold. Perhaps the odd wintry shower around. Strong northwesterly winds easing.

Fri 27 Mar

Sunrise:
Sunset:

Cloud with occasional rain, this most likely at first and again later in the day.

Sat 28 Mar

Sunrise:
Sunset:

Mainly dry although rather cloudy.

Updated at:

Summit specific forecast

Mountain summit forecast map

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