Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for settled weather on Saturday. Moderate for cloud amounts on Sunday and shower detail on Monday.
This evening forecast
Dry with clear spells into the night and turning cold.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.
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.
Mountain weather forecast
Cold but bright start with lengthy sunny spells.
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | <05% | 00% | 00% | <05% | <05% | <05% | <05% |
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 |
NE
9
|
NE
6
|
E
6
|
N
6
|
N
9
|
N
9
|
N
8
|
NE
7
|
| 300m |
NE
3
|
N
2
|
E
2
|
NE
3
|
N
6
|
N
6
|
N
5
|
NE
4
|
| Valley |
NE
3
|
N
3
|
NE
2
|
N
2
|
N
5
|
N
5
|
N
5
|
NE
3
|
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 | 13 | 8 | 7 | 10 | 14 | 13 | 11 | 11 |
| 300m | 10 | 4 | 4 | 5 | 11 | 11 | 10 | 9 |
| Valley | 9 | 6 | 5 | 5 | 11 | 10 | 11 | 9 |
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
3°
|
2°
|
2°
|
4°
|
7°
|
8°
|
8°
|
5°
|
| 300m |
4°
|
2°
|
2°
|
7°
|
10°
|
11°
|
10°
|
6°
|
| Valley |
4°
|
2°
|
2°
|
8°
|
11°
|
12°
|
11°
|
6°
|
| Freezing Level |
1,000m
|
900m
|
800m
|
900m
|
1,100m
|
1,200m
|
1,200m
|
1,200m
|
Altitude above mean sea level
| 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|---|---|
| 600m |
-1°
|
0°
|
-1°
|
2°
|
4°
|
6°
|
5°
|
2°
|
| 300m |
3°
|
1°
|
1°
|
6°
|
9°
|
10°
|
9°
|
5°
|
| Valley |
3°
|
1°
|
1°
|
7°
|
10°
|
11°
|
10°
|
5°
|
Additional weather information
Meteorologist's view
Cold start with layers advisable. Sunscreen also recommend with moderate UV levels.
Weather
A frosty start to the morning with some mist and fog patches in the valleys. Dry with plenty of sunshine through the day and some variable cloud at times in the afternoon. Generally light northerly winds and feeling chilly at height.
Chance of cloud-free hill tops
95%
Low cloud and visibility
Mist and fog patches in the valleys first thing, otherwise any cloud generally developing above highest routes. Very good to excellent visibility.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 1.4mm | 2.4mm |
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
A bright start to the west of the park, cloudier further east with cloud continuing to thicken through the afternoon. Largely dry but some rain and drizzle possible later in the afternoon and into the evening, mainly in the north and east.
Chance of cloud-free hill tops
80%, best in the west in the morning
Maximum wind speed expected
Northeasterly 10 mph, gusting 15-20 mph.
Temperature
- At 600m Plus 1 Celsius rising to Plus 6 Celsius.
- Valley Plus 5 Celsius rising to Plus 11 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Cloud generally above summits but cloud may shroud higher routes through the afternoon at times. Good visibility for much of the day outside of this cloud, but falling to Moderate or Poor in any light rain or drizzle later.
Mountain weather information
Mon 22 Apr
Sunrise:
Sunset:
Turning cloudier through the morning with low cloud developing widely with some patchy rain possible. Winds becoming light northeasterly with freezing level above summits.
Tue 23 Apr
Sunrise:
Sunset:
Cloud breaking to leave sunnier spells into the afternoon with the odd shower. Light to moderate northeasterly winds. Freezing level above summits.
Wed 24 Apr
Sunrise:
Sunset:
Often cloudy on Wednesday with a low chance of a shower. Brightest in the west of the park. Light to moderate northwesterly winds.
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.