Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for a cold, initially breezy, and dry day Monday but lower for cloud details Tuesday and timing of the rain Wednesday and details generally thereafter.
This evening forecast
Any remaining afternoon cloud and rain soon clearing away south then mainly dry with long clear spells developing. Feeling cold with occasionally strong westerly winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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
Mainly dry with sunny spells. Occasionally strong winds easing
| 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) |
<05% | <05% | <05% | <05% | <05% | <05% | <05% | 10% |
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 |
W
21
|
W
21
|
NW
20
|
NW
19
|
NW
21
|
NW
22
|
NW
18
|
NW
13
|
| 300m |
W
11
|
W
10
|
W
11
|
NW
12
|
NW
13
|
NW
14
|
NW
9
|
W
7
|
| Valley |
W
10
|
W
10
|
W
9
|
NW
11
|
NW
12
|
NW
13
|
NW
8
|
W
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 | 29 | 29 | 27 | 27 | 29 | 31 | 24 | 19 |
| 300m | 26 | 23 | 23 | 24 | 25 | 25 | 17 | 15 |
| Valley | 26 | 24 | 21 | 24 | 25 | 26 | 17 | 14 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
3°
|
3°
|
4°
|
5°
|
5°
|
5°
|
5°
|
| 300m |
6°
|
5°
|
5°
|
7°
|
8°
|
9°
|
8°
|
7°
|
| Valley |
6°
|
6°
|
6°
|
8°
|
9°
|
10°
|
9°
|
7°
|
| Freezing Level |
900m
|
900m
|
900m
|
900m
|
900m
|
1,000m
|
1,100m
|
2,000m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-2°
|
-3°
|
-3°
|
-2°
|
0°
|
0°
|
0°
|
1°
|
| 300m |
2°
|
2°
|
2°
|
4°
|
5°
|
6°
|
5°
|
5°
|
| Valley |
3°
|
2°
|
3°
|
5°
|
6°
|
7°
|
6°
|
6°
|
Additional weather information
Meteorologist's view
Gusts around 40mph over higher ridges and summits easing.
Weather
Dry with clear spells overnight. Then a bright, rather cold day with sunny spells. Cloud increases through the evening, with perhaps a little light rain and drizzle developing in the west towards midnight.
Chance of cloud-free hill tops
Around 90%, chances fall again towards midnight.
Low cloud and visibility
Occasional cloud above about 750m through the morning then lifting above the summits for much of the afternoon, then periods above about 600m developing towards midnight. Away from cloud visibility very good, with some good panoramic views of surrounding hills, falling to several kilometres in rain and drizzle later towards midnight.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.4mm | 5mm | 9.2mm |
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
A mostly cloudy start with outbreaks of mainly light rain and drizzle, especially for western hills with the best of any clearer or brighter spells across the east. It becomes drier through the morning with cloud lifting and breaking to leave the afternoon dry with sunny spells before cloud increases again in the evening.
Chance of cloud-free hill tops
Little chance in west, but around 60% in east, at first but improving to 90% through the morning. Chances fall again in the evening.
Maximum wind speed expected
Westerly 15mph gradually easing and backing more southwesterly 10mph or less
Temperature
- At 600m Around plus 3 Celsius rising to plus 8 Celsius
- Valley Around plus 4 or 5 Celsius at dawn rising to plus 14 or 15 Celsius by day
- Freezing level Above the summits
Low cloud and visibility
Periods or persistent cloud above 450-600m, with patches below, but more occasional above 600m at times in the east, at first and again later in evening, generally lifting above the summits through morning. Away from cloud visibility good falling to several kilometres in rain and drizzle.
Mountain weather information
Wed 1 Apr
Sunrise:
Sunset:
Cloudy with outbreaks of rain, clearing in the evening with clear spells developing. Occasionally fresh southwesterly winds turning northerly and easing. Freezing level above summits.
Thu 2 Apr
Sunrise:
Sunset:
Dry with clear or sunny spells but outbreaks of rain spreading east in evening. Mainly light and variable winds, becoming southerly later. Freezing level falling to 750m for a time.
Fri 3 Apr
Sunrise:
Sunset:
Rain clearing overnight then mostly dry with sunny spells. Light southerly then westerly winds. Freezing level above the summits falling to 450m.
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.