Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High becoming Medium from Sunday.
This evening forecast
Cloudy or partly cloudy. Occasional rain or showers. Moderate southwest winds.
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, then some drier and brighter spells.
| 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) |
60% | 70% | 80% | 80% | 70% | 30% | 40% | 60% |
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 |
W
9
|
W
12
|
W
14
|
W
18
|
W
20
|
W
19
|
W
12
|
W
12
|
| 300m |
SW
4
|
SW
6
|
W
7
|
W
10
|
W
12
|
W
11
|
W
7
|
W
7
|
| Valley |
W
3
|
W
5
|
W
6
|
W
9
|
W
11
|
W
11
|
W
5
|
SW
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 | 15 | 18 | 20 | 24 | 27 | 25 | 19 | 17 |
| 300m | 12 | 16 | 17 | 21 | 25 | 22 | 17 | 15 |
| Valley | 12 | 13 | 17 | 21 | 24 | 22 | 15 | 15 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
5°
|
5°
|
5°
|
4°
|
5°
|
4°
|
3°
|
| 300m |
6°
|
7°
|
7°
|
7°
|
7°
|
8°
|
6°
|
5°
|
| Valley |
6°
|
7°
|
8°
|
8°
|
8°
|
8°
|
7°
|
6°
|
| Freezing Level |
1,400m
|
1,400m
|
1,400m
|
1,400m
|
1,200m
|
1,100m
|
1,100m
|
1,000m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
1°
|
1°
|
1°
|
0°
|
-1°
|
0°
|
0°
|
-1°
|
| 300m |
4°
|
5°
|
5°
|
4°
|
4°
|
4°
|
4°
|
3°
|
| Valley |
5°
|
6°
|
6°
|
5°
|
5°
|
6°
|
5°
|
4°
|
Additional weather information
Meteorologist's view
Nothing further to add.
Weather
Mostly cloudy with outbreaks of rain, heavy at times, overnight and during the morning. Some brighter spells with occasional showers during the afternoon, the showers becoming more widespread and heavy in the evening and turning wintry over the highest summits by midnight.
Chance of cloud-free hill tops
30% becoming 60% in the afternoon.
Low cloud and visibility
Occasional or extensive cloud, base 300 to 600m, occasionally lifting 600 to 900m through the afternoon. Visibility moderate to very poor in cloud, rain and snow, otherwise good or very good.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 13.6mm | 19.2mm | 21mm |
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
Outbreaks of rain overnight turning to snow at most levels during the morning, heavy and persistent at times with blizzard conditions developing at height. The snow and low level rain turning light and patchy during the afternoon, with clearing skies and a frost and ice developing in the evening. Strong to gale force northeast winds with a severe wind chill.
Chance of cloud-free hill tops
20% rising to 50% late afternoon and 90% in the evening.
Maximum wind speed expected
Northeast 25 to 35mph gusting 50mph.
Temperature
- At 600m Zero to Minus 2 Celsius, later Minus 4 Celsius
- Valley Plus 2 to 4 Celsius, later Minus 2 Celsius
- Freezing level Around the summits falling 200 to 400m, later all levels.
Low cloud and visibility
Extensive low cloud, base 300 to 600m gradually lifting through the afternoon, before clearing during the evening. Visibility mostly moderate or very poor, but becoming very good or excellent later.
Mountain weather information
Sat 14 Feb
Sunrise:
Sunset:
Dry and bright with sunny or clear spells, a hard frost at first. Mostly light winds, but strengthening from the south in the evening, patchy snow by midnight. Freezing all levels at first, rising to around 300m
Sun 15 Feb
Sunrise:
Sunset:
Rain and snow with blizzard conditions for a time at height. Severe gale or storm force southerly winds, becoming strong to gale force from the west or southwest during daylight hours, the freezing level rising near or above the summits. Turning more showery.
Mon 16 Feb
Sunrise:
Sunset:
Showers or longer outbreaks of rain and snow as the freezing level lowers to around 600m. Gale to storm force northwest winds for a time. Severe 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.