Mountain weather

Mountain weather

Bannau Brycheiniog / Brecon Beacons

Confidence

High for over unsettled nature of the weather, but lower for rain and low cloud details for Saturday.

Mountain hazards

Mountain weather hazards

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

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.

Mountain weather forecast

Cloudy with outbreaks of rain spreading east, these perhaps heavy at times.

Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
Weather
(at 800m)
Weather symbols Cloudy Cloudy Light rain Light rain Light rain Light rain
Chance of
precipitation
(at 800m)
Chance of precipitation
20%
20%
70%
90%
80%
50%

Wind direction and speed

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
600m
600m SW 7mph knots
SW
7mph
SW 11mph knots
SW
11mph
SW 13mph knots
SW
13mph
W 15mph knots
W
15mph
SW 14mph knots
SW
14mph
W 12mph knots
W
12mph
300m
300m SW 3mph knots
SW
3mph
SW 8mph knots
SW
8mph
SW 9mph knots
SW
9mph
W 10mph knots
W
10mph
SW 9mph knots
SW
9mph
W 7mph knots
W
7mph
Valley
Valley SE 1mph knots
SE
1mph
W 7mph knots
W
7mph
SW 8mph knots
SW
8mph
W 9mph knots
W
9mph
W 8mph knots
W
8mph
W 6mph knots
W
6mph

Wind gust

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
600m
600m 11mph 14mph 17mph 19mph 19mph 18mph
300m
300m 9mph 13mph 16mph 18mph 17mph 16mph
Valley
Valley 7mph 12mph 15mph 19mph 17mph 16mph

Altitude above mean sea level
Time
Time
06:00
09:00
12:00
15:00
18:00
21:00
600m
600m 2 degrees Celsius 2 degrees Celsius 4 degrees Celsius 4 degrees Celsius 4 degrees Celsius 3 degrees Celsius
300m
300m 6 degrees Celsius 7 degrees Celsius 9 degrees Celsius 9 degrees Celsius 8 degrees Celsius 6 degrees Celsius
Valley
Valley 5 degrees Celsius 9 degrees Celsius 10 degrees Celsius 10 degrees Celsius 9 degrees Celsius 7 degrees Celsius
Freezing Level Freezing Level
1100m
1500m
1700m
1700m
1700m
1600m

Additional weather information

Meteorologist's view

Rainfall combined with low cloud are expected to reduce visibility on exposed terrain, with wet surfaces increasing the risk of slips and difficult footing.

Weather

Largely dry but cloudy start, but outbreaks of light rain will arrive from the west by late morning and then possibly become heavy at times. Late evening the rain moves away east, with largely cloudy conditions following.

Chance of cloud-free hill tops

100% until midday, then decreasing to 50%.

Low cloud and visibility

Cloud bases dropping by midday to around 700-800m, with occasional patches of cloud possible 600-700m. Good visibility to start but becoming hazy to poor in low cloud and rain.

Ground conditions

No recent ground conditions report available.

Summit specific forecast