Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High overall, though moderate for location and intensity of heavy and thundery showers.
This evening forecast
A chance of isolated thunderstorms this evening, then becoming dry.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Poor Visibility
Thunderstorms
Mountain weather forecast
Misty low cloud clearing then warm sunny spells and isolated heavy showers.
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
Weather (at 600m) |
||||||||
Chance of precipitation (at 600m) |
20% | 10% | 10% | 20% | 30% | 60% | 20% | 10% |
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
600m |
SW
7
|
S
7
|
S
7
|
SE
5
|
SE
5
|
SE
4
|
N
5
|
NW
5
|
300m |
SW
4
|
S
3
|
SE
2
|
SE
3
|
S
6
|
SW
2
|
N
3
|
W
4
|
Valley |
SW
3
|
SW
2
|
E
2
|
SE
3
|
SW
5
|
NW
3
|
NW
4
|
NW
4
|
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
600m | 10 | 9 | 10 | 8 | 9 | 7 | 8 | 8 |
300m | 8 | 7 | 5 | 7 | 10 | 6 | 7 | 6 |
Valley | 8 | 5 | 5 | 7 | 10 | 8 | 9 | 7 |
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
600m |
9°
|
9°
|
9°
|
11°
|
14°
|
15°
|
14°
|
11°
|
300m |
11°
|
10°
|
10°
|
14°
|
16°
|
18°
|
16°
|
12°
|
Valley |
11°
|
10°
|
11°
|
15°
|
17°
|
18°
|
17°
|
12°
|
Freezing Level |
2,200m
|
2,100m
|
2,000m
|
2,000m
|
2,100m
|
2,200m
|
2,200m
|
2,200m
|
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
600m |
7°
|
7°
|
7°
|
10°
|
13°
|
14°
|
13°
|
10°
|
300m |
10°
|
10°
|
10°
|
14°
|
16°
|
18°
|
16°
|
11°
|
Valley |
11°
|
10°
|
11°
|
15°
|
16°
|
18°
|
16°
|
12°
|
Additional weather information
Meteorologist's view
Strong sunshine at this time of the year so ensure you have sun protection with high UV levels expected.
Weather
Mist and low cloud forming through the early hours but some clear spells continuing. Any low cloud soon clearing after dawn to leave sunny spells and broken cloud. A warm afternoon with sunny spells but isolated slow-moving showers are likely to develop with a low risk of these turning into thunderstorms. Becoming dry during the evening.
Chance of cloud-free hill tops
30% soon rising to 95% or more by mid-morning.
Low cloud and visibility
Areas of low cloud above 300-500m at first but some mist or fog also possible in the valleys. Cloud and fog lifting and clearing most summits by mid-morning. Generally good visibility thereafter but deteriorating to poor or very poor in any afternoon heavy showers or thunderstorms.
Recent rainfall
Last 24 hours | Last 48 hours | Last 72 hours |
---|---|---|
0.8mm | 24.6mm | 35.8mm |
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.
Mountain weather information
Weather
Any low cloud at first, soon clearing to once again leave a day of sunny spells and showers. Perhaps fewer sunny intervals than on Friday with a higher risk of heavy showers. These could be slow-moving and locally thundery with hail possible before easing through the evening.
Chance of cloud-free hill tops
60% becoming 90% by mid-morning. Falling to 60% during showers.
Maximum wind speed expected
Northerly 10-15 mph.
Temperature
- At 600m Plus 10 Celsius rising to plus 15 Celsius.
- Valley Plus 9 Celsius rising to plus 20 Celsius.
- Freezing level Well above the summits.
Low cloud and visibility
Areas of low cloud above 500m at first and some mist or fog also possible in the valleys. Cloud and fog lifting and clearing most summits by mid-morning. Generally good visibility thereafter but deteriorating to poor or very poor in any afternoon heavy showers or thunderstorms.
Mountain weather information
Sun 19 May
Morning fog patches soon clearing then a largely dry day with lengthy sunny periods. The small chance of an isolated afternoon shower developing. Light northeasterly winds. High UV levels.
Mon 20 May
Morning mist and fog quickly clearing, then dry with sunny spells. Light northeasterly winds. High UV levels.
Tue 21 May
Turning more changeable but some uncertainty in the details. Showers developing with a chance of longer spells of rain later. Winds remaining light from variable directions.
Summit specific forecast
Mountain summit forecast map
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.