Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for a mostly dry and sunny day on Tuesday after a cloudy start. Low for shower detail later in the week and how the changeable spell develops into the weekend.
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.
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
Cloudy start with conditions improving through the morning.
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
10% | 30% | 20% | 10% | <05% | <05% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
NW
9
|
NE
10
|
N
11
|
N
13
|
NE
11
|
NE
8
|
| 300m |
NW
4
|
NE
6
|
N
8
|
NE
9
|
NE
7
|
N
4
|
| Valley |
W
3
|
NE
6
|
N
7
|
N
8
|
N
5
|
N
5
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 11 | 14 | 16 | 19 | 16 | 13 |
| 300m | 8 | 10 | 14 | 16 | 13 | 12 |
| Valley | 8 | 11 | 15 | 16 | 12 | 13 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
5°
|
5°
|
6°
|
8°
|
7°
|
4°
|
| 300m |
7°
|
7°
|
10°
|
11°
|
10°
|
5°
|
| Valley |
8°
|
8°
|
11°
|
12°
|
11°
|
6°
|
| Freezing Level |
1,400m
|
1,400m
|
1,200m
|
1,200m
|
1,200m
|
1,100m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
2°
|
2°
|
3°
|
4°
|
4°
|
1°
|
| 300m |
6°
|
6°
|
8°
|
9°
|
8°
|
4°
|
| Valley |
7°
|
6°
|
9°
|
10°
|
10°
|
5°
|
Additional weather information
Meteorologist's view
Dull first thing with poor visibilities and patchy rain. Adequate layers required with conditions improving but remaining chilly. Moderate UV levels with sunscreen advised.
Weather
Low cloud to start, perhaps bringing some hill fog and the odd spot of rain and drizzle. Conditions generally improving through the morning, leaving a dry afternoon with light winds. Any cloud generally with high bases with sunshine breaking through at times leaving a pleasant afternoon. Feeling cool, particularly across high peaks and as the sun sets.
Chance of cloud-free hill tops
20% during the morning, rising to 90% by midday.
Low cloud and visibility
Low cloud with bases around 400-500m to start with hill fog possible across lower upslope regions too. Poor visibility within low cloud and drizzly outbreaks. This clearing quickly through the morning leaving little to no low cloud and excellent visibility for scenic outlooks.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.6mm | 0.6mm | 0.6mm |
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
A chilly and frost start then a mix of cloud, with bases above hill tops, and sunny spells developing through the afternoon with a chance of the odd light shower, mainly to the east of the park. Feeling chilly still.
Chance of cloud-free hill tops
90%
Maximum wind speed expected
North to northwesterly, 10-15 mph gusting 20-25 mph
Temperature
- At 600m Plus 2 Celsius rising to Plus 7 Celsius.
- Valley Plus 5 Celsius rising to Plus 12 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Mist and fog in the valleys first thing, otherwise cloud above summits. Very good visibility, perhaps moderate in any shower.
Mountain weather information
Thu 25 Apr
Sunrise:
Sunset:
Another chilly but bright start then a largely cloudier day compared with Wednesday with the occasional break. Light to moderate northwesterly winds. Freezing level above summits.
Fri 26 Apr
Sunrise:
Sunset:
A mixture of sunny spells and more frequent showers, heavy at times. Light to moderate winds, mainly southwesterly. Freezing level above summits.
Sat 27 Apr
Sunrise:
Sunset:
Low confidence but generally unsettled with showers or longer spells of rain. Light to moderate winds to start, variable mainly northeasterly.
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.