Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High overall, lower for extent of early morning fog and clearance times.
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.
Mountain weather forecast
Widely dry and fine with plenty of warm sunshine throughout the day.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | <05% | <05% | <05% | <05% | <05% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
SW
12
|
SW
12
|
SW
13
|
SW
13
|
SW
10
|
SW
9
|
| 300m |
SW
5
|
SW
7
|
SW
9
|
SW
9
|
SW
7
|
SW
5
|
| Valley |
W
3
|
SW
5
|
SW
8
|
SW
8
|
W
5
|
SW
4
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 15 | 15 | 17 | 17 | 13 | 13 |
| 300m | 13 | 13 | 15 | 16 | 12 | 10 |
| Valley | 12 | 11 | 15 | 16 | 12 | 9 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
6°
|
8°
|
11°
|
12°
|
11°
|
8°
|
| 300m |
8°
|
12°
|
15°
|
15°
|
13°
|
9°
|
| Valley |
8°
|
13°
|
15°
|
16°
|
14°
|
10°
|
| Freezing Level |
1,400m
|
1,500m
|
1,700m
|
1,900m
|
1,700m
|
2,200m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
3°
|
6°
|
8°
|
9°
|
9°
|
6°
|
| 300m |
6°
|
11°
|
13°
|
13°
|
12°
|
8°
|
| Valley |
7°
|
12°
|
14°
|
14°
|
13°
|
9°
|
Additional weather information
Meteorologist's view
A fine day, however largely clear skies will bring plenty of strong sunshine, with moderate to high UV levels expected. Consider an additional light layer if walking early in the morning or into the evening when it will be chillier over higher ground.
Weather
Early morning mist and low cloud will lift soon after sunrise with widely dry and fine conditions to follow. Clear skies make for plenty of sunshine with generally light winds, though UV levels are expected to be moderate to high.
Chance of cloud-free hill tops
20% soon becoming 90% shortly after sunrise.
Low cloud and visibility
Mist and low cloud will sit as hill fog obscuring the peaks through the early morning giving very poor visibility at first. Soon though, cloud will lift and clear for most, although perhaps lingering over far western slopes, with very good visibility expected through the late morning and afternoon, and excellent air quality giving far-reaching views of distant peaks.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 2.6mm | 3.6mm | 3.6mm |
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
Some patchy fog may form in the early hours but any lingering mist will clear shortly after sunrise, leading to another widely dry and fine day. Plenty of long sunny spells with moderate to high UV levels expected.
Chance of cloud-free hill tops
60% soon becoming 100%.
Maximum wind speed expected
Southerly 10-15mph.
Temperature
- At 600m Plus 6 Celsius rising to plus 14 Celsius.
- Valley Plus 6 Celsius rising to plus 20 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Isolated areas of mist and patchy fog may linger in the early hours of Monday giving poor visibility at times, but soon after dawn, cloud will have cleared. Very good visibility with excellent air quality resulting in far reaching views of distant peaks throughout the day.
Mountain weather information
Tue 29 Apr
Sunrise:
Sunset:
Widely dry and fine with plenty of sunshine. Feeling warm, even at the summits into the afternoon, with moderate to high UV levels. Light to moderate south-easterly winds. Freezing level above the summits.
Wed 30 Apr
Sunrise:
Sunset:
Warm, dry and sunny with widely clear skies. Moderate to high UV levels, with south-easterly winds a touch stronger than recent days. Freezing level above the summits.
Thu 1 May
Sunrise:
Sunset:
Plenty of sunshine throughout the day thanks to clear skies. Lighter winds than Wednesday, and feeling warm too with moderate to high UV levels expected by the afternoon. Freezing level above the summits.
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.