Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Medium
This evening forecast
Rain or showers with lowering cloud. Moderate or fresh southwest winds at height.
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.
Thunderstorms
Lightning is a significant mountain hazard which can result in serious injury or death. Mountain terrain often leaves one highly exposed to lightning strikes. Hail may give unpleasant conditions with torrential rain and localised flash flooding also possible, mainly in Summer months.
Mountain weather forecast
Cloudy, but some brighter spells in the afternoon. Occasional rain or showers. Chilly winds.
| 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) |
70% | 70% | 70% | 40% | 30% | 30% | 60% | 70% |
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 |
SW
18
|
SW
12
|
SW
13
|
S
14
|
S
14
|
S
14
|
S
17
|
S
18
|
| 300m |
SW
8
|
SW
5
|
SW
6
|
S
5
|
S
8
|
S
7
|
S
7
|
S
9
|
| Valley |
SW
4
|
SW
3
|
S
3
|
S
2
|
S
7
|
S
6
|
SE
4
|
SE
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 | 24 | 16 | 17 | 18 | 18 | 20 | 24 | 25 |
| 300m | 19 | 14 | 15 | 13 | 16 | 15 | 19 | 20 |
| Valley | 16 | 11 | 12 | 10 | 14 | 13 | 16 | 17 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
5°
|
5°
|
5°
|
5°
|
5°
|
6°
|
4°
|
4°
|
| 300m |
7°
|
6°
|
6°
|
7°
|
8°
|
8°
|
6°
|
6°
|
| Valley |
8°
|
7°
|
7°
|
7°
|
9°
|
9°
|
7°
|
7°
|
| Freezing Level |
1,400m
|
1,300m
|
1,300m
|
1,200m
|
1,200m
|
1,200m
|
1,200m
|
1,200m
|
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°
|
2°
|
-1°
|
-1°
|
| 300m |
5°
|
5°
|
5°
|
5°
|
6°
|
7°
|
4°
|
4°
|
| Valley |
6°
|
6°
|
6°
|
6°
|
8°
|
8°
|
5°
|
5°
|
Additional weather information
Meteorologist's view
Nothing further to add.
Weather
Outbreaks of rain and drizzle overnight and during the morning. The cloud lifting a breaking during the afternoon with a scattering of showers, some brighter spells expected. Becoming rather cloudy with showery outbreaks of rain during the evening, the showers perhaps heavy and thundery.
Chance of cloud-free hill tops
30% becoming 70% in the afternoon, before lowering again in the evening.
Low cloud and visibility
Occasional or extensive low cloud, base 400 to 700m, lifting and breaking at times in the afternoon, cloud near or above the summits at times. Visibility moderate to very poor in cloud and rain, occasionally good or very good through the afternoon.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 19mm | 34.2mm | 45.8mm |
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 and outbreaks of rain overnight. The cloud tending to lift a little during the day, but patchy rain or showers at times.
Chance of cloud-free hill tops
30% rising to 60% during the afternoon.
Maximum wind speed expected
Southeast 20 to 25mph gusting 35mph.
Temperature
- At 600m Plus 3 or 4 Celsius
- Valley Plus 5 to 9 Celsius
- Freezing level Above the summits.
Low cloud and visibility
Occasional or extensive low cloud, base 400 to 700m, lifting and breaking at times during the day, cloud near or above the summits at times. Visibility moderate to very poor in cloud and rain, occasionally good or very good during daylight hours.
Mountain weather information
Tue 10 Feb
Sunrise:
Sunset:
Cloudy with outbreaks of rain and drizzle. Low cloud. Moderate to fresh south or southeast winds at height. Freezing level above the summits.
Wed 11 Feb
Sunrise:
Sunset:
Cloudy with outbreaks of rain and drizzle. Fresh to strong southwest winds at height. Freezing level above the summits.
Thu 12 Feb
Sunrise:
Sunset:
Rather cloudy with rain or showers, wintry over the summits later. Strengthening northwest winds later. Freezing level falling to around to summits later.
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.