Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Medium
This evening forecast
Cloudy with outbreaks of rain. Moderate southwesterly winds at height.
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.
Severe Chill Effect
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Heavy Persistent Rain
Heavy and persistent rain can lead to drenched clothing and footwear with waterproofs often becoming soaked through, especially if accompanied by strong winds. This can lead to significant loss of body heat and an increased likelihood of hypothermia. Terrain may turn increasingly boggy underfoot while streams can flood and become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.
Mountain weather forecast
Outbreaks of rain. Some drier and brighter spells developing.
| 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) |
80% | 80% | 70% | 70% | 70% | 40% | 30% | 20% |
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
12
|
SW
15
|
W
19
|
W
21
|
SW
23
|
SW
18
|
SW
10
|
SW
7
|
| 300m |
SW
6
|
SW
7
|
W
11
|
SW
12
|
SW
13
|
SW
10
|
SW
6
|
SW
4
|
| Valley |
S
2
|
SW
5
|
W
10
|
W
10
|
SW
12
|
SW
8
|
SW
5
|
SW
3
|
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 | 16 | 20 | 25 | 28 | 31 | 25 | 14 | 11 |
| 300m | 15 | 17 | 23 | 26 | 27 | 20 | 13 | 9 |
| Valley | 12 | 15 | 23 | 25 | 25 | 19 | 13 | 8 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
7°
|
7°
|
6°
|
6°
|
6°
|
6°
|
5°
|
5°
|
| 300m |
8°
|
8°
|
8°
|
8°
|
9°
|
8°
|
7°
|
6°
|
| Valley |
8°
|
9°
|
9°
|
9°
|
9°
|
9°
|
7°
|
6°
|
| Freezing Level |
1,800m
|
1,800m
|
1,700m
|
1,600m
|
1,500m
|
1,300m
|
1,200m
|
1,200m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
3°
|
2°
|
1°
|
1°
|
1°
|
1°
|
2°
|
| 300m |
7°
|
7°
|
6°
|
5°
|
6°
|
6°
|
5°
|
4°
|
| Valley |
7°
|
8°
|
6°
|
6°
|
7°
|
7°
|
6°
|
5°
|
Additional weather information
Meteorologist's view
Nothing further to add.
Weather
Cloudy with outbreaks of rain. Drier and brighter spells developing in the afternoon.
Chance of cloud-free hill tops
30% rising to 70% in the afternoon.
Low cloud and visibility
Occasional or extensive cloud, base 300 to 600m, lifting 600 to 900m during the afternoon, perhaps breaking at times. Visibility moderate to very poor in rain and cloud, becoming mostly good or very good during the afternoon.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 5.6mm | 7.4mm | 14.4mm |
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
Mostly cloudy with showers or longer outbreaks of rain, the rain heavy at times. Significant wind chill.
Chance of cloud-free hill tops
60%, best chance in the afternoon.
Maximum wind speed expected
West or Southwest 20 to 25mph gusting 35mph.
Temperature
- At 600m Plus 2 to 4 Celsius.
- Valley Plus 6 to 10 Celsius, later 4 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Occasional or extensive cloud, base 600 to 900m, lowering 300 to 600m at times.
Mountain weather information
Fri 13 Feb
Sunrise:
Sunset:
Outbreak of rain and snow, freezing level around the summits at first, lowering 200 to 400m. Strong to gale force northeast winds at height with a severe wind chill.
Sat 14 Feb
Sunrise:
Sunset:
Mainly dry, bright and cold with a widespread frost. Isolated snow showers. Light or moderate west or northwest winds daylight hours. Freezing most levels.
Sun 15 Feb
Sunrise:
Sunset:
Outbreaks of rain and snow. Freezing level well down overnight, but mainly near or above the summits during daylight hours. Blizzard conditions possible at first, gale or severe gale force southerly winds at height, turning into the west daylight hours. Severe wind chill.
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.