Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
A cold period of weather with plenty of sunshine. Strong winds will enhance the wind chill for the midweek period, becoming slightly milder towards the weekend. Lower confidence in details of the milder air arriving by the weekend. Keep an eye on the most up to date forecasts.
This evening forecast
Dry with temperatures quickly falling to give a risk of ice.
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.
Mountain weather forecast
Cold but sunny with a brisk north to north-westerly wind.
| 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% | <05% | <05% | <05% | <05% | <05% |
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 |
NW
13
|
NW
13
|
NW
14
|
NW
14
|
N
18
|
N
16
|
N
14
|
N
13
|
| 300m |
W
5
|
W
6
|
W
6
|
W
6
|
NW
10
|
NW
8
|
NW
5
|
NW
5
|
| Valley |
W
5
|
W
6
|
W
6
|
W
6
|
NW
9
|
NW
8
|
NW
5
|
NW
6
|
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 | 19 | 19 | 20 | 20 | 24 | 22 | 21 | 18 |
| 300m | 12 | 14 | 15 | 15 | 20 | 17 | 15 | 13 |
| Valley | 13 | 14 | 16 | 15 | 20 | 18 | 16 | 14 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-3°
|
-3°
|
-3°
|
-2°
|
0°
|
0°
|
-1°
|
-2°
|
| 300m |
-1°
|
-2°
|
-2°
|
-1°
|
3°
|
3°
|
0°
|
-1°
|
| Valley |
-1°
|
-1°
|
-1°
|
0°
|
4°
|
4°
|
1°
|
0°
|
| Freezing Level |
0m
|
0m
|
0m
|
0m
|
300m
|
400m
|
200m
|
200m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-9°
|
-9°
|
-9°
|
-8°
|
-6°
|
-5°
|
-7°
|
-7°
|
| 300m |
-4°
|
-5°
|
-5°
|
-4°
|
-1°
|
0°
|
-3°
|
-3°
|
| Valley |
-4°
|
-4°
|
-5°
|
-3°
|
1°
|
1°
|
-2°
|
-3°
|
Additional weather information
Meteorologist's view
A very cold day expected on the hills despite the sunshine, with a significant wind-chill factor at height.
Weather
A dry, sunny day expected. Remaining very cold however with a hard frost overnight and temperatures reaching only low single digits maximum by day with fresh north or north-westerly winds continuing.
Chance of cloud-free hill tops
95%, patchy cloud around summits in the afternoon.
Low cloud and visibility
Perhaps some fair weather cloud around 600m at times. Very good or excellent visibility expected.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 4.2mm | 5mm | 5mm |
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
Remaining cold in the northerly airflow, otherwise a dry, bright and sunny morning with light north-westerly winds backing south-westerly later in the day. Higher level cloud moving in during the evening.
Chance of cloud-free hill tops
Above 95%.
Maximum wind speed expected
Northwesterly 10-15 mph.
Temperature
- At 600m Minus 4 Celsius rising to Plus 1 Celsius.
- Valley ZERO rising to Plus 6 Celsius.
- Freezing level Generally above 600m, with frost in valleys until midmorning.
Low cloud and visibility
Limited cloud with excellent visibility.
Mountain weather information
Sat 22 Nov
Sunrise:
Sunset:
Southerly winds will introduce milder air and some precipitation, the mix of snow/sleet and rain is uncertain at this time. Freezing level rising above all summits.
Sun 23 Nov
Sunrise:
Sunset:
Expected to remain chilly with cloudier conditions, outbreaks of rain or showers and westerly winds, low confidence in the detail for later in the weekend.
Mon 24 Nov
Sunrise:
Sunset:
Staying mixed with showers and moderate westerly winds.
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.