Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High overall.
This evening forecast
Mostly dry and settled. Thickening cloud from the west which may bring some isolated spots of light rain. Light winds.
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.
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
A dry and settled day with warm spells of sunshine.
| 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) |
20% | 20% | 10% | <05% | <05% | 10% | <05% | <05% |
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 |
N
3
|
N
4
|
NE
4
|
NE
5
|
N
6
|
N
9
|
N
10
|
NE
12
|
| 300m |
NW
2
|
W
1
|
W
1
|
NE
3
|
N
4
|
N
7
|
N
7
|
NE
7
|
| Valley |
NW
3
|
NW
2
|
W
2
|
NE
2
|
N
4
|
N
7
|
N
7
|
NE
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 | 4 | 5 | 5 | 7 | 9 | 14 | 14 | 18 |
| 300m | 4 | 3 | 3 | 6 | 8 | 13 | 13 | 15 |
| Valley | 4 | 4 | 4 | 5 | 9 | 14 | 15 | 16 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
10°
|
9°
|
8°
|
11°
|
14°
|
14°
|
12°
|
8°
|
| 300m |
9°
|
8°
|
8°
|
14°
|
17°
|
17°
|
15°
|
10°
|
| Valley |
10°
|
8°
|
9°
|
15°
|
18°
|
17°
|
15°
|
11°
|
| Freezing Level |
1,700m
|
1,700m
|
1,600m
|
1,800m
|
1,900m
|
2,100m
|
2,000m
|
1,800m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
9°
|
8°
|
8°
|
10°
|
13°
|
12°
|
10°
|
5°
|
| 300m |
9°
|
8°
|
8°
|
13°
|
16°
|
15°
|
14°
|
8°
|
| Valley |
9°
|
7°
|
8°
|
14°
|
17°
|
16°
|
14°
|
10°
|
Additional weather information
Meteorologist's view
A great day for any outdoor activities. Sunny intervals and moderate to high UV levels expected so sun protection is suggested.
Weather
Some localised mist and fog patches possible at first in sheltered valleys, this will quickly clear to leave a bright and dry start to the day with plenty of sunny spells. There is a very low risk of some isolated showers later in the day, most likely to the east of the national park.
Chance of cloud-free hill tops
90% rising to 95%.
Low cloud and visibility
Any valley mist and fog may lift briefly into low cloud before dissipating. Very good or good visibilities expected with distant hills often turning hazy. Very poor or poor visibility in mist of fog initially or in low cloud as it lifts.
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
A cloudy start with some light showers possible. Turning brighter in the afternoon with sunny spells. Light winds though a little breezier across summits later. Cooler than of late but warm in the sunshine.
Chance of cloud-free hill tops
20% rising to 80% from mid-afternoon.
Maximum wind speed expected
15 mph
Temperature
- At 600m Plus 4 Celsius rising to plus 8 Celsius.
- Valley Plus 5 Celsius rising to Plus 15 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Low cloud around 300-500ft will lift to above summits from mid-afternoon. Visibility will be poor to very poor amongst low cloud and hill fog but will improve later, becoming good to very good with hazy spells of sunshine across the park.
Mountain weather information
Wed 29 Apr
Sunrise:
Sunset:
A dry and bright day with lots of sunshine. Windy with northeasterly winds becoming strong over and to the lee of summits and ridges. Freezing level above summits. Feeling warm but chilly in brisk winds.
Thu 30 Apr
Sunrise:
Sunset:
Another settled day. More dry weather and sunny spells throughout. Moderate to fresh easterly winds, often strong over summits and ridges. Warm but a slight wind chill in brisk winds across summits.
Fri 1 May
Sunrise:
Sunset:
Cloudier on Friday with a risk of showers. Light to moderate easterly winds. Warm in any brighter spells.
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.