Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High
This evening forecast
Dry with clear spells developing.
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
Dry and bright. Strengthening winds later.
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | <05% | <05% | 00% | 00% | <05% | 10% | 40% |
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
14
|
SW
13
|
SW
14
|
SW
16
|
SW
21
|
SW
23
|
SW
24
|
SW
28
|
| 300m |
SW
8
|
SW
8
|
SW
8
|
SW
9
|
SW
12
|
SW
12
|
SW
14
|
SW
16
|
| Valley |
SW
7
|
SW
6
|
SW
6
|
SW
7
|
SW
9
|
SW
10
|
SW
11
|
SW
13
|
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 | 20 | 18 | 19 | 22 | 27 | 30 | 33 | 39 |
| 300m | 18 | 17 | 18 | 20 | 23 | 26 | 28 | 33 |
| Valley | 17 | 16 | 17 | 19 | 21 | 24 | 26 | 30 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
5°
|
4°
|
4°
|
4°
|
5°
|
5°
|
5°
|
5°
|
| 300m |
6°
|
6°
|
6°
|
6°
|
8°
|
8°
|
7°
|
7°
|
| Valley |
6°
|
6°
|
6°
|
6°
|
9°
|
8°
|
8°
|
8°
|
| Freezing Level |
1,200m
|
1,200m
|
1,200m
|
1,100m
|
1,200m
|
1,200m
|
1,200m
|
1,300m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
0°
|
0°
|
0°
|
0°
|
0°
|
0°
|
0°
|
-1°
|
| 300m |
3°
|
3°
|
3°
|
3°
|
5°
|
5°
|
4°
|
3°
|
| Valley |
4°
|
4°
|
4°
|
4°
|
6°
|
6°
|
5°
|
5°
|
Additional weather information
Meteorologist's view
Nothing further to add.
Weather
Occasional or patchy summit cloud possible overnight and early morning but mainly clear, then dry and bright during daylight hours with sunny spells. Strengthening southwest winds and patchy rain possible in the evening.
Chance of cloud-free hill tops
70% falling 40% in the evening.
Low cloud and visibility
Occasional or patchy summit cloud possible overnight and daylight hours, becoming extensive and lowering 600m or so in the evening. Visibility mostly good or very good, but moderate to very poor in any summit cloud and patchy rain in the evening.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 4.6mm | 4.8mm | 14mm |
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.
Mountain weather information
Weather
A rather cloudy day. Mainly dry but patchy light rain and drizzle at times. Windy with summit gales possible.
Chance of cloud-free hill tops
40%
Maximum wind speed expected
South or Southwest 25 to 35mph gusting 50mph.
Temperature
- At 600m Plus 4 to 6 Celsius.
- Valley Plus 8 to 12 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Occasional or Extensive low cloud, base 400 to 700m. Visibility moderate to very poor, but good at times lower down. .
Mountain weather information
Mon 15 Dec
Sunrise:
Sunset:
Cloudy with outbreaks of rain, heavy and persistent at times. Winds from the south or southwest and strong to gale force over the tops. Extensive low cloud and poor or very poor visibility at times.
Tue 16 Dec
Sunrise:
Sunset:
Mainly dry with bright or clear spells. Light or moderate west or northwest winds at height. Freezing level near or above the summits.
Wed 17 Dec
Sunrise:
Sunset:
Dry overnight and perhaps the morning, turning cloudy with outbreaks of rain, heavy and persistent at times. South or southwest winds becoming strong to gale force at height.
Updated at:
Summit specific forecast
Mountain summit forecast map
Loading map…
Key
Mountain summits
Other points of interest
Cluster of multiple stations
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.