Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for cold conditions over the next few days but lower confidence for Wednesday for the location of an area of sleet or snow pushing in from the southwest. High for milder Atlantic air arriving Friday.
This evening forecast
Cloudy with a few showers, wintry on the tops, but becoming drier later with clear spells developing. Strong northwest winds and severe wind chill on the summits. Freezing level above summits falling to 500m.
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
Dry and mostly cloudy. Light winds during daytime. Cold.
| 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) |
10% | 10% | 10% | 00% | 00% | 00% | 10% | 10% |
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
20
|
NW
16
|
NW
14
|
NW
9
|
N
7
|
E
7
|
E
11
|
E
16
|
| 300m |
W
8
|
W
7
|
W
5
|
W
4
|
N
4
|
E
5
|
E
6
|
E
7
|
| Valley |
W
7
|
W
7
|
W
5
|
W
4
|
N
3
|
E
5
|
E
5
|
E
7
|
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 | 26 | 23 | 21 | 14 | 9 | 9 | 18 | 26 |
| 300m | 20 | 19 | 15 | 11 | 7 | 9 | 14 | 18 |
| Valley | 18 | 18 | 14 | 11 | 6 | 9 | 14 | 18 |
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°
|
-1°
|
0°
|
1°
|
1°
|
0°
|
-1°
|
| 300m |
2°
|
1°
|
0°
|
2°
|
4°
|
4°
|
2°
|
1°
|
| Valley |
3°
|
2°
|
1°
|
2°
|
5°
|
5°
|
3°
|
2°
|
| Freezing Level |
400m
|
300m
|
200m
|
400m
|
400m
|
400m
|
300m
|
200m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-6°
|
-6°
|
-6°
|
-5°
|
-2°
|
-2°
|
-5°
|
-7°
|
| 300m |
-1°
|
-2°
|
-2°
|
0°
|
3°
|
2°
|
0°
|
-2°
|
| Valley |
0°
|
-1°
|
-2°
|
0°
|
4°
|
3°
|
1°
|
-1°
|
Additional weather information
Meteorologist's view
Light winds through most of the day with good hillwalking conditions but feeling cold at all heights.
Weather
Clear spells overnight with fresh northwest winds and the odd wintry shower. A dry day with some sunshine at first and winds easing but some thick high cloud will spread across from the southwest. A little light sleet or snow may arrive from the southwest in the late afternoon or evening.
Chance of cloud-free hill tops
95%.
Low cloud and visibility
Excellent visibility with no low cloud expected during the day. The odd patch of summit cloud in the early hours and again during the evening.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 1.6mm | 15.2mm | 16mm |
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
Cloudy with outbreaks of sleet or snow spreading in from the southwest, perhaps turning heavy for a time. There is a lot of uncertainty in how far north this will come. Feeling bitterly cold with severe gales on the tops and strong downslope gusts developing.
Chance of cloud-free hill tops
30%.
Maximum wind speed expected
East or Southeast 25 to 35mph gusts 45mph increasing 35 to 45mph gusts 60mph.
Temperature
- At 600m Minus 2C.
- Valley Plus 2 or 3C.
- Freezing level 300 or 400m.
Low cloud and visibility
Cloud becoming extensive above 500m with patches to lower slopes. Mainly good visibility at first but becoming poor or very poor in snow.
Mountain weather information
Thu 19 Feb
Sunrise:
Sunset:
Sleet or snow clearing overnight. Dry with bright or sunny spells during the day and remaining cold. Strong easterly winds becoming light. Freezing level 200 to 400m.
Fri 20 Feb
Sunrise:
Sunset:
Turning increasing windy and unsettled with outbreaks of rain spreading in from the west, preceded briefly by summit snow. Southwesterly gales. Freezing level rising above summits.
Sat 21 Feb
Sunrise:
Sunset:
Remaining unsettled with showers or longer spells of rain. Gale force west or southwest winds. Freezing level above summits.
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.