Mountain weather
Bannau Brycheiniog / Brecon Beacons
Confidence
High overall but medium to low confidence from Sunday.
-
This eveningSunrise:Sunset:
-
Fri 15 MaySunrise:Sunset:
-
Sat 16 MaySunrise:Sunset:
-
Further outlook
This evening forecast
Showers and longer spells of rain gradually easing this evening. Heavy at first but turning lighter as the evening progresses.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Poor Visibility
Mountain weather forecast
Some showers possible. Lighter than recent days. Mostly dry by the afternoon.
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Time
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Time |
00:00
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03:00
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06:00
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09:00
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12:00
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15:00
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18:00
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21:00
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|---|---|---|---|---|---|---|---|---|---|
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Weather
(at 800m)
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Weather symbols | ||||||||
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Chance of
precipitation (at 800m)
|
Chance of precipitation |
20%
|
20%
|
20%
|
30%
|
30%
|
10%
|
10%
|
10%
|
Wind direction and speed
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Time
|
Time |
00:00
|
03:00
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06:00
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09:00
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12:00
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15:00
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18:00
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21:00
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|---|---|---|---|---|---|---|---|---|---|
|
600m
|
600m | NW 10mph knots
NW
10mph |
N 9mph knots
N
9mph |
NW 7mph knots
NW
7mph |
NW 13mph knots
NW
13mph |
NW 14mph knots
NW
14mph |
NW 15mph knots
NW
15mph |
NW 14mph knots
NW
14mph |
NW 9mph knots
NW
9mph |
|
300m
|
300m | NW 4mph knots
NW
4mph |
NW 3mph knots
NW
3mph |
W 4mph knots
W
4mph |
NW 9mph knots
NW
9mph |
NW 11mph knots
NW
11mph |
NW 12mph knots
NW
12mph |
NW 10mph knots
NW
10mph |
W 5mph knots
W
5mph |
|
Valley
|
Valley | NW 4mph knots
NW
4mph |
NW 4mph knots
NW
4mph |
W 4mph knots
W
4mph |
W 7mph knots
W
7mph |
NW 10mph knots
NW
10mph |
NW 11mph knots
NW
11mph |
NW 10mph knots
NW
10mph |
NW 6mph knots
NW
6mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
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06:00
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09:00
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12:00
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15:00
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18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
600m
|
600m | 16mph | 14mph | 11mph | 18mph | 21mph | 22mph | 21mph | 16mph |
|
300m
|
300m | 12mph | 11mph | 9mph | 18mph | 19mph | 22mph | 19mph | 13mph |
|
Valley
|
Valley | 12mph | 11mph | 10mph | 14mph | 21mph | 22mph | 20mph | 14mph |
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Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
600m
|
600m | 3 degrees Celsius 3°C | 2 degrees Celsius 2°C | 3 degrees Celsius 3°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 4 degrees Celsius 4°C |
|
300m
|
300m | 5 degrees Celsius 5°C | 3 degrees Celsius 3°C | 6 degrees Celsius 6°C | 8 degrees Celsius 8°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 5 degrees Celsius 5°C |
|
Valley
|
Valley | 6 degrees Celsius 6°C | 4 degrees Celsius 4°C | 6 degrees Celsius 6°C | 9 degrees Celsius 9°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 6 degrees Celsius 6°C |
| Freezing Level | Freezing Level |
1100m
|
900m
|
1000m
|
1100m
|
900m
|
1000m
|
900m
|
900m
|
|
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 | -1 degrees Celsius -1°C | 0 degrees Celsius 0°C | 2 degrees Celsius 2°C | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C | 2 degrees Celsius 2°C | 0 degrees Celsius 0°C |
|
300m
|
300m | 3 degrees Celsius 3°C | 1 degrees Celsius 1°C | 4 degrees Celsius 4°C | 6 degrees Celsius 6°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 6 degrees Celsius 6°C | 3 degrees Celsius 3°C |
|
Valley
|
Valley | 4 degrees Celsius 4°C | 2 degrees Celsius 2°C | 5 degrees Celsius 5°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 7 degrees Celsius 7°C | 4 degrees Celsius 4°C |
| Freezing Level | Freezing Level |
1100m
|
900m
|
1000m
|
1100m
|
900m
|
1000m
|
900m
|
900m
|
Additional weather information
Meteorologist's view
UV levels are moderate to high so sun protection is advised.
Weather
A few showers pushing south across the park during the morning. Turning drier and brighter into the afternoon with a chance some isolated showers returning later into the evening. Light to moderate northwesterly winds.
Chance of cloud-free hill tops
70% with a chance of cloud shrouding hill tops during showers.
Low cloud and visibility
Patchy cloud shrouding the summits first thing, lifting by the afternoon, with a chance, in isolated showers during the evening, that cloud could return to summit tops. Generally very good visibility but dropping to moderate in showers.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
Often cloudy with spells of light and patchy rain. Light to moderate westerly winds.
Chance of cloud-free hill tops
70% until midday, dropping to 30%
Maximum wind speed expected
20 mph.
Temperature
- At 600m Plus 2 Celsius rising to plus 7 Celsius.
- Valley Plus 1 Celsius rising to plus 14 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Cloud tops dropping from midday to around 400-500m alongside patchy rain. Good visibility to start but becoming moderate to poor in low cloud and rain.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sun 17 May
Rain clearing during the early hours. Dry by the afternoon with some sunny spells. Moderate westerly winds.
Mon 18 May
Spells of rain and showers. This heavy at times. Moderate to strong southerly winds.
Tue 19 May
Another unsettled day with heavy rain and showers. Strong southwesterly winds.
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.