Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Medium
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.
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.
Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.
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 with outbreaks of heavy rain. Windy.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
80% | 70% | 40% | 70% | 90% | 60% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
S
30
|
S
32
|
S
31
|
S
36
|
S
33
|
S
26
|
| 300m |
S
15
|
SW
16
|
S
16
|
S
20
|
S
19
|
S
16
|
| Valley |
S
11
|
SW
13
|
S
13
|
S
15
|
S
17
|
S
14
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 37 | 42 | 42 | 47 | 45 | 35 |
| 300m | 32 | 34 | 34 | 40 | 39 | 33 |
| Valley | 30 | 32 | 31 | 36 | 39 | 32 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
9°
|
10°
|
10°
|
10°
|
10°
|
10°
|
| 300m |
10°
|
12°
|
13°
|
13°
|
12°
|
12°
|
| Valley |
11°
|
13°
|
13°
|
13°
|
12°
|
12°
|
| Freezing Level |
2,200m
|
2,200m
|
2,200m
|
2,300m
|
2,400m
|
2,300m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
4°
|
5°
|
6°
|
5°
|
6°
|
6°
|
| 300m |
7°
|
9°
|
10°
|
9°
|
9°
|
9°
|
| Valley |
8°
|
10°
|
11°
|
11°
|
10°
|
10°
|
Additional weather information
Meteorologist's view
Nothing further to add.
Weather
Cloudy with outbreaks of rain, heavy at times, during the morning. Perhaps a brief drier interlude around the middle of the day, before further spells of rain, heavy and persistent at times, arrives in the afternoon. Rain gradually easing by late evening.
Chance of cloud-free hill tops
30% overnight and early afternoon, otherwise 10% or less.
Low cloud and visibility
Extensive low cloud, base 300 to 600m, perhaps lifting and breaking a little around the middle of the day. Visibility mainly moderate to very poor, perhaps good at times in the afternoon, mainly lower down.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 7.4mm | 15.6mm | 15.8mm |
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
Mostly cloudy with outbreaks of rain and drizzle, heavy at times, although some drier spells overnight and early morning.
Chance of cloud-free hill tops
30%.
Maximum wind speed expected
South or Southwest 15 to 20mph.
Temperature
- At 600m Plus 6 to 9 Celsius
- Valley Plus 8 to 12 Celsius
- Freezing level Above the summits.
Low cloud and visibility
Occasional or extensive cloud, base 300 to 600m. Moderate to very poor in cloud and rain, but good at times lower down.
Mountain weather information
Thu 13 Nov
Sunrise:
Sunset:
Mostly cloudy with outbreaks of rain and drizzle. Light or moderate southwesterly winds at height.
Fri 14 Nov
Sunrise:
Sunset:
Cloudy with outbreaks of rain. Gale or severe gale east or northeast winds at height with a severe wind chill and buffeting.
Sat 15 Nov
Sunrise:
Sunset:
Cloudy or bright. Occasional rain. Strong to gale force east or northeast winds at height with a severe wind chill and some buffeting.
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.