Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High on the unsettled theme through midweek. Low for westward extent of rain on Wednesday.
This evening forecast
Showers easing with outbreaks of rain, heavy at times, arriving to eastern parts.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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.
Mountain weather forecast
Unsettled with spells of heavy and persistent rain into the afternoon.
| 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% | 60% | 60% | 70% | 70% | 70% | 70% | 70% |
Wind direction and speed (mph)
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
W
9
|
W
11
|
W
12
|
NW
13
|
W
16
|
NW
18
|
NW
20
|
NW
20
|
| 300m |
W
5
|
W
6
|
W
7
|
W
8
|
W
10
|
W
12
|
W
12
|
W
12
|
| Valley |
W
5
|
W
6
|
W
6
|
W
7
|
W
10
|
W
11
|
W
12
|
W
11
|
Wind gust (mph)
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m | 12 | 13 | 16 | 18 | 21 | 25 | 28 | 27 |
| 300m | 11 | 13 | 14 | 16 | 20 | 23 | 25 | 25 |
| Valley | 12 | 13 | 13 | 16 | 21 | 24 | 25 | 25 |
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
10°
|
9°
|
9°
|
10°
|
10°
|
10°
|
10°
|
9°
|
| 300m |
11°
|
11°
|
11°
|
12°
|
12°
|
12°
|
12°
|
11°
|
| Valley |
12°
|
11°
|
11°
|
12°
|
13°
|
13°
|
12°
|
12°
|
| Freezing Level |
2,200m
|
2,100m
|
2,100m
|
2,100m
|
2,100m
|
2,200m
|
2,100m
|
2,100m
|
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
8°
|
6°
|
6°
|
7°
|
7°
|
7°
|
6°
|
5°
|
| 300m |
10°
|
10°
|
10°
|
10°
|
10°
|
10°
|
9°
|
8°
|
| Valley |
11°
|
10°
|
10°
|
11°
|
12°
|
11°
|
10°
|
9°
|
Additional weather information
Meteorologist's view
Low confidence in detail, keep up to date to the latest forecast. Wet weather clothes essential.
Weather
Cloudy with outbreaks of slow moving rain, turning heavy at times though detail uncertain on exact positioning. Breezier and feeling cooler.
Chance of cloud-free hill tops
Less than 20%.
Low cloud and visibility
Widespread low cloud by mid-morning was bases 400-500 m dropping lower in heavier persistent rain. Moderate visibilities becoming poor to very poor in low cloud and heavy persistent rain.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 0mm | 0mm |
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 mostly light rain and drizzle, on and off throughout the day, that may turn heavy at times.
Chance of cloud-free hill tops
20% rising to 40% mid-morning before dropping back to 20% later.
Maximum wind speed expected
Northwesterly 30 mph gusting 35-40 mph
Temperature
- At 600m Plus 8 Celsius.
- Valley Plus 14 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Low cloud down to 400-500 m through the morning, perhaps lifting by mid-morning, then dropping back down by late afternoon. Visibility moderate to poor, very poor in persistent rain and drizzle.
Mountain weather information
Fri 24 May
Sunrise:
Sunset:
Patchy rain at first, clearing by the afternoon to leave some late sunshine. Lighter southwesterly winds.
Sat 25 May
Sunrise:
Sunset:
Mostly fine and dry, and feeling warm, however winds increasing through the afternoon. Cloud perhaps increasing from the west later in the day.
Sun 26 May
Sunrise:
Sunset:
Sunny spells and showers. Feeling warm with light winds.
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.