Mountain weather
Bannau Brycheiniog / Brecon Beacons
Confidence
High confidence.
-
This eveningSunrise:Sunset:
-
Wed 13 MaySunrise:Sunset:
-
Thu 14 MaySunrise:Sunset:
-
Further outlook
This evening forecast
Chilly this evening with patchy cloud and clear spells.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Heavy Persistent Rain
Thunderstorms
Mountain weather forecast
Cold with blustery showers.
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols | ||||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
20%
|
70%
|
70%
|
70%
|
70%
|
70%
|
70%
|
70%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
600m
|
600m | W 19mph knots
W
19mph |
W 27mph knots
W
27mph |
W 24mph knots
W
24mph |
W 25mph knots
W
25mph |
NW 26mph knots
NW
26mph |
NW 24mph knots
NW
24mph |
NW 21mph knots
NW
21mph |
NW 20mph knots
NW
20mph |
|
300m
|
300m | W 9mph knots
W
9mph |
W 16mph knots
W
16mph |
W 15mph knots
W
15mph |
W 16mph knots
W
16mph |
NW 17mph knots
NW
17mph |
NW 16mph knots
NW
16mph |
W 12mph knots
W
12mph |
W 10mph knots
W
10mph |
|
Valley
|
Valley | W 8mph knots
W
8mph |
W 14mph knots
W
14mph |
W 13mph knots
W
13mph |
W 15mph knots
W
15mph |
NW 15mph knots
NW
15mph |
NW 15mph knots
NW
15mph |
W 11mph knots
W
11mph |
W 9mph knots
W
9mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
600m
|
600m | 26mph | 37mph | 32mph | 33mph | 35mph | 33mph | 29mph | 27mph |
|
300m
|
300m | 22mph | 35mph | 31mph | 32mph | 32mph | 31mph | 23mph | 22mph |
|
Valley
|
Valley | 20mph | 33mph | 30mph | 31mph | 32mph | 32mph | 23mph | 22mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
600m
|
600m | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C |
|
300m
|
300m | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C |
|
Valley
|
Valley | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 8 degrees Celsius 8°C | 7 degrees Celsius 7°C |
| Freezing Level | Freezing Level |
1200m
|
1200m
|
1000m
|
1000m
|
1100m
|
1100m
|
1100m
|
1000m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
600m
|
600m | 0 degrees Celsius 0°C | -2 degrees Celsius -2°C | -2 degrees Celsius -2°C | -2 degrees Celsius -2°C | 0 degrees Celsius 0°C | 1 degrees Celsius 1°C | -1 degrees Celsius -1°C | -2 degrees Celsius -2°C |
|
300m
|
300m | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C | 3 degrees Celsius 3°C | 3 degrees Celsius 3°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C |
|
Valley
|
Valley | 6 degrees Celsius 6°C | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 6 degrees Celsius 6°C | 4 degrees Celsius 4°C |
| Freezing Level | Freezing Level |
1200m
|
1200m
|
1000m
|
1000m
|
1100m
|
1100m
|
1100m
|
1000m
|
Additional weather information
Meteorologist's view
Rather cold throughout with a strong wind chill. Surfaces will be slippery, appropriate clothing and grip shoes required.
Weather
Blustery showers will spread in on Wednesday with heavy downpours at times. These could fall as sleet or hail at times. Some clear or sunny spells will develop at times, but skies will often quickly cloud over again as more showers approach. There is also a small risk of thunderstorms, particularly during the afternoon.
Chance of cloud-free hill tops
Around 70% throughout.
Low cloud and visibility
Cloud bases mostly above the level of summits throughout, however levels likely to drop with temporary deteriorations as cloud bases drop low enough to shield summits for a time. Visibility generally high, however reducing to moderate in any rain.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
Scattered showers continuing on Thursday with heavy downpours at times, and perhaps hail at times too. A small chance of thunderstorms during the afternoon and a few brighter spells. Feeling cold. Brisk winds, but lighter than Wednesday.
Chance of cloud-free hill tops
70% throughout.
Maximum wind speed expected
Northerly 10-15 mph gusting 25-30 mph
Temperature
- At 600m Plus 2 rising to plus 8
- Valley Plus 1 rising to plus 12
- Freezing level Above summits.
Low cloud and visibility
Cloud bases largely above summits, but occasionally dropping to shield the summits at times in heavier showers.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Fri 15 May
A chilly start, but mostly fine and dry, turning cloudier into the afternoon. Light winds, but still widely cool.
Sat 16 May
A largely dry day with sunny spells. Cloud perhaps thickening at times, and light winds.
Sun 17 May
Skies clouding over from the west on Sunday with showery outbreaks of rain. Rain likely clearing to the east later but remaining largely cloudy.
Summit specific forecast
The Bannau Brycheiniog / Brecon Beacons is a mountain range in South Wales comprising six main peaks, with the highest peak, Pen y Fan, standing at 886 metres.