Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for general developments. Medium for cloud details.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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
Dull start. Brightening up. Breezy and mild.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
50% | 30% | 20% | 10% | 10% | 20% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
SW
24
|
S
24
|
S
24
|
S
26
|
S
24
|
S
24
|
| 300m |
SW
11
|
SW
10
|
S
10
|
S
10
|
S
6
|
S
7
|
| Valley |
SW
5
|
SW
6
|
S
8
|
S
7
|
SW
4
|
E
4
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 30 | 31 | 30 | 33 | 31 | 31 |
| 300m | 24 | 24 | 20 | 22 | 19 | 22 |
| Valley | 17 | 18 | 18 | 19 | 11 | 10 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
6°
|
6°
|
7°
|
8°
|
7°
|
6°
|
| 300m |
8°
|
8°
|
10°
|
12°
|
9°
|
7°
|
| Valley |
8°
|
9°
|
11°
|
12°
|
10°
|
8°
|
| Freezing Level |
1,700m
|
1,600m
|
1,600m
|
1,700m
|
1,800m
|
1,800m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
0°
|
0°
|
2°
|
4°
|
2°
|
1°
|
| 300m |
5°
|
6°
|
8°
|
10°
|
8°
|
5°
|
| Valley |
8°
|
8°
|
10°
|
11°
|
9°
|
7°
|
Additional weather information
Meteorologist's view
Nothing further to add.
Weather
Patchy light rain and drizzle possible overnight, but manly dry by dawn. Mainly dry during daylight hours with the cloud lifting and some brighter spells developing, the best of these in the east of the park. Dry with clear spells possible in the evening.
Chance of cloud-free hill tops
30% rising to 80% in the afternoon.
Low cloud and visibility
Occasional or extensive low cloud, base 300 to 500m, lifting above the summits during the day, perhaps breaking at times. Visibility moderate to very poor in early rain, drizzle and cloud, but becoming mostly good or very good.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 3.8mm | 8.8mm | 24mm |
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
Lowering cloud with patchy drizzle overnight. Cloudy during daylight hours and the evening with occasional rain or showers.
Chance of cloud-free hill tops
40%
Maximum wind speed expected
South or Southwest 20 to 25mph, gusting 35mph.
Temperature
- At 600m Plus 5 to 7 Celsius
- Valley Plus 7 to 13 Celsius
- Freezing level Above the summits
Low cloud and visibility
Occasional or extensive low cloud, base 400 to 700m. Visibility moderate to very poor in cloud and rain, otherwise good or very good.
Mountain weather information
Thu 26 Feb
Sunrise:
Sunset:
Cloudy with showers or longer outbreaks of rain. Strong to gale force southwest winds at height. Freezing level above the summits.
Fri 27 Feb
Sunrise:
Sunset:
Heavy rain soon clearing to showers. The showers turning wintry over the tops by the end of the day. Strong to gale force west or southwest winds at height with a severe wind chill.
Sat 28 Feb
Sunrise:
Sunset:
Wintry showers soon dying out. Then rain developing during the afternoon and evening, snow possible at first over the summits with strong to gale force southerly winds developing. Freezing level around the summits at first, soon rising above the summits. 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.