Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for cloudy and settled conditions to start and turning colder by the start of next week, lower confidence in the details.
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.
Mountain weather forecast
Often cloudy, but largely dry with some brighter spells developing in the afternoon.
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | <05% | <05% | <05% | <05% | 10% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
NE
15
|
NE
12
|
NE
10
|
NE
8
|
NE
7
|
E
6
|
| 300m |
N
3
|
NE
3
|
NE
6
|
NE
5
|
E
3
|
E
2
|
| Valley |
N
2
|
NE
2
|
NE
6
|
NE
4
|
E
2
|
SE
2
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 20 | 16 | 13 | 10 | 10 | 9 |
| 300m | 10 | 10 | 12 | 9 | 7 | 6 |
| Valley | 8 | 8 | 11 | 9 | 7 | 5 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
8°
|
8°
|
8°
|
8°
|
6°
|
6°
|
| 300m |
9°
|
9°
|
10°
|
10°
|
7°
|
6°
|
| Valley |
9°
|
10°
|
11°
|
11°
|
8°
|
6°
|
| Freezing Level |
2,600m
|
2,500m
|
2,300m
|
1,700m
|
2,000m
|
1,900m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
5°
|
5°
|
6°
|
6°
|
4°
|
4°
|
| 300m |
8°
|
9°
|
9°
|
9°
|
7°
|
5°
|
| Valley |
9°
|
10°
|
10°
|
10°
|
7°
|
5°
|
Additional weather information
Meteorologist's view
Poor visibilities with additional layers required.
Weather
A dull and grey start to the day with overcast low cloud and hill fog. Some cloud breaks developing from the north during the afternoon. A marked inversion around 800m may see some of the height peaks reaching above the cloud tops.
Chance of cloud-free hill tops
20% rising to 60%.
Low cloud and visibility
Overcast cloud bases 300-500m to start with some cloud breaks developing into the afternoon. Peaks above 800m likely clear of cloud above the inversion. Poor visibility in cloud, becoming moderate to good in the afternoon. Very good above cloud tops.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 0mm | 0mm |
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
Early mist and valley fog clearing, leaving a bright and chilly start to Friday. Staying dry with bright spells through the afternoon, before turning cloudier from the north by the evening.
Chance of cloud-free hill tops
70%
Maximum wind speed expected
Southwesterly 10-15mph
Temperature
- At 600m Plus 2 Celsius becoming 5 Celsius.
- Valley Plus 4 Celsius becoming Plus 10 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Early fog giving poor visibilities, otherwise very good with limited low cloud.
Mountain weather information
Sat 16 Nov
Sunrise:
Sunset:
Cloudy with some patchy light rain and drizzle at times. Moderate westerly summit winds. Freezing level above all peaks.
Sun 17 Nov
Sunrise:
Sunset:
Dull with periods of rain, perhaps heavy at times, with snow on the highest summits. Fresh westerly winds, feeling much colder, with added wind chill.
Mon 18 Nov
Sunrise:
Sunset:
Brighter with showers, with snow over the highest summits. Strong winds adding to the wind chill.
Updated at:
Summit specific forecast
Mountain summit forecast map
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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.