Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for high pressure maintaining relatively settled conditions but low for the cloud detail.
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
Rather cloudy, particularly in east. Mainly dry. Light winds.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
10% | <05% | 10% | 10% | <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 |
E
8
|
E
10
|
NE
9
|
NE
9
|
NE
11
|
NE
10
|
| 300m |
E
4
|
E
5
|
NE
6
|
NE
6
|
NE
6
|
NE
5
|
| Valley |
E
3
|
E
5
|
NE
6
|
NE
6
|
NE
5
|
NE
4
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 10 | 12 | 12 | 11 | 16 | 14 |
| 300m | 8 | 8 | 10 | 10 | 14 | 12 |
| Valley | 9 | 9 | 10 | 10 | 13 | 10 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
8°
|
8°
|
10°
|
10°
|
8°
|
8°
|
| 300m |
10°
|
11°
|
13°
|
13°
|
10°
|
10°
|
| Valley |
11°
|
12°
|
14°
|
14°
|
11°
|
10°
|
| Freezing Level |
2,700m
|
2,600m
|
2,400m
|
2,200m
|
2,300m
|
2,500m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
6°
|
5°
|
8°
|
8°
|
5°
|
5°
|
| 300m |
9°
|
10°
|
12°
|
12°
|
9°
|
9°
|
| Valley |
10°
|
11°
|
13°
|
13°
|
10°
|
10°
|
Additional weather information
Meteorologist's view
Navigation difficult at times, chiefly in east, in quite extensive hill fog.
Weather
Quite a lot of low cloudy about, particularly across eastern areas of the Park early and late in the day. Best of brighter spells in the west and during the afternoon, but prolonged sunshine above the inversion which will be around 800m. Most staying dry but the chance of a few outbreaks of light rain and drizzle also mist and fog appearing.
Chance of cloud-free hill tops
60% above 800m, below this level 40% in west, 25% in east due to inversion but low confidence in this level of detail
Low cloud and visibility
Cloud below around 800m occasional or quite extensive in east, particularly early and late in the day, but more broken in the west. Little cloud above the inversion. Visibility becoming moderate or poor in mist and rain, very poor in fog and within cloud.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.2mm | 0.2mm | 0.2mm |
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
Similar expectations to Tuesday, with low cloud quite extensive in the east, less so in the west, with some limited drizzle and a risk of valley mist and fog. Sunshine extensive above the inversion, occasionally penetrating below, particularly for the afternoon and in the west, but detail remains elusive.
Chance of cloud-free hill tops
80% above 800m, below this level 40% in west, 25% in east due to inversion but low confidence in this level of detail
Maximum wind speed expected
Variable less than 15mph
Temperature
- At 600m Plus 6 to 9 Celsius
- Valley Plus 7 rising to 16 Celsius
- Freezing level Above summits
Low cloud and visibility
Cloud below around 800m occasional or quite extensive in east, particularly early and late in the day, but more broken in the west. Little cloud above the inversion. Visibility becoming moderate or poor in mist and rain, very poor in fog and within cloud.
Mountain weather information
Thu 16 Oct
Sunrise:
Sunset:
Most dry with brighter spells increasing into the afternoon, particularly across the west. Light winds. Freezing level above all peaks.
Fri 17 Oct
Sunrise:
Sunset:
Most dry with brighter spells increasing into the afternoon, particularly across the west. Light winds. Freezing level above all peaks.
Sat 18 Oct
Sunrise:
Sunset:
Most dry with brighter spells increasing into the afternoon, particularly across the west. Light winds. Freezing level above all peaks.
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.