Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for a return to milder, unsettled conditions from mid-week. Medium in details.
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.
Mountain weather forecast
Rain and sleet dying out. Some brighter spells developing later.
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
60% | 60% | 20% | 10% | 10% | <05% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
N
13
|
N
13
|
N
10
|
N
9
|
NE
9
|
NE
5
|
| 300m |
NW
5
|
N
7
|
N
5
|
N
4
|
NE
4
|
NE
2
|
| Valley |
NW
4
|
N
6
|
N
5
|
N
3
|
NE
3
|
NE
2
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 16 | 17 | 14 | 12 | 12 | 8 |
| 300m | 13 | 14 | 11 | 8 | 9 | 5 |
| Valley | 12 | 13 | 11 | 8 | 9 | 5 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
2°
|
1°
|
2°
|
2°
|
1°
|
1°
|
| 300m |
3°
|
3°
|
4°
|
4°
|
3°
|
2°
|
| Valley |
4°
|
4°
|
4°
|
5°
|
3°
|
2°
|
| Freezing Level |
800m
|
800m
|
800m
|
900m
|
800m
|
700m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
-3°
|
-4°
|
-2°
|
-2°
|
-2°
|
-2°
|
| 300m |
1°
|
0°
|
2°
|
3°
|
1°
|
1°
|
| Valley |
2°
|
1°
|
3°
|
4°
|
2°
|
1°
|
Additional weather information
Meteorologist's view
Nothing to add.
Weather
Outbreaks of rain during the morning, wintry at times over the summits. The rain and sleet gradually dying out during the morning. Remaining mostly cloudy, but some brighter spells are possible in the afternoon, mainly in the west. Partly cloudy or clear spells in the evening with a frost developing.
Chance of cloud-free hill tops
20% in the morning rising to 70% in the afternoon.
Low cloud and visibility
Extensive cloud, base around 600m, with patches or occasional cloud to 300m. The cloud lifting and breaking near the summits in the afternoon. Visibility moderate to very poor in rain, sleet and cloud, becoming mainly good or very good in the afternoon.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 2mm | 21.4mm | 22.4mm |
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
Patchy freezing fog possible in the valleys overnight, otherwise partly cloudy with a frost likely. Dry with some early brightness, but cloud tending to thicken and lower during the day along with strengthening south or southeast winds, giving severe wind chill. Outbreaks of heavy rain in the evening, perhaps some summit snow for a short time.
Chance of cloud-free hill tops
70% during daylight hours, decreasing 10% from late afternoon.
Maximum wind speed expected
Southeast 15mph, increasing to 35mph gusts 50mph.
Temperature
- At 600m Minus 1 Celsius, later Plus 4 Celsius
- Valley Minus 1 Celsius rising to plus 6 Celsius
- Freezing level All levels at first, rising above the summits.
Low cloud and visibility
Occasional cloud, base 400-600m overnight, perhaps lifting and breaking briefly around the middle of the day. Cloud becoming extensive, base 300 to 600m from late afternoon. Visibility occasionally good, but moderate in rain and very poor in cloud and in any hill snow during the evening.
Mountain weather information
Thu 7 Dec
Sunrise:
Sunset:
Cloudy and overcast with outbreaks of rain, heavy and persistent at times. South or southeast gales at height. Freezing level above the summits.
Fri 8 Dec
Sunrise:
Sunset:
Mostly cloudy with showers or longer outbreaks of rain, heavy at times. Strong to gale force south or southwest winds at height. Freezing level above the summits.
Sat 9 Dec
Sunrise:
Sunset:
Cloudy with showers or longer outbreaks of rain, heavy at times. Strong west or southwest winds at height. Freezing level above the summits.
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.
The summits of each peak form a long ridge with four of the peaks forming a horseshoe shape around the head of the Taf Fechan River which flows away to the south-east. The Bannau Brycheiniog / Brecon Beacons is said to be named after the ancient practice of lighting signal fires (beacons) on mountains to warn of attacks by invaders, or more recently to commemorate public and national events such as coronations or the Millennium.
For ardent mountain climbers, the Brecon Beacons National Park is among the best that Britain has to offer. While it doesn't have some of the headline-grabbing peaks of Snowdonia or the Scottish Highlands, it fits scores of slightly smaller mountains into its relatively compact 519 square mile area. These include the area's highest peak, Pen y Fan, as well as the marginally smaller Corn Du (873 metres). Both offer rather hospitable, anvil-shaped summits to those who reach the top, with plenty of space for rest and photographs, before tackling the descent.