Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for a largely fine, but bitterly cold day Monday and for a change to more unsettled, slightly milder conditions through the middle of the week, but low from later Thursday due to uncertainties over the track of a potentially deep area of low pressure, currently expected to move east across the southern United Kingdom.
This evening forecast
Snow showers gradually evening with a severe chill effect at all levels. Occasionally fresh northwesterly 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.
Mountain weather forecast
Dry with long sunny spells. Bitterly cold despite easing winds
| 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) |
30% | 10% | <05% | <05% | <05% | <05% | <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 |
NW
13
|
N
12
|
NW
13
|
NW
14
|
NW
13
|
NW
13
|
N
12
|
N
9
|
| 300m |
NW
6
|
NW
4
|
W
6
|
W
6
|
NW
6
|
NW
5
|
N
4
|
SW
4
|
| Valley |
W
6
|
W
4
|
W
6
|
W
6
|
NW
6
|
NW
5
|
NW
3
|
W
4
|
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 | 17 | 16 | 18 | 19 | 17 | 17 | 17 | 13 |
| 300m | 12 | 11 | 13 | 14 | 13 | 11 | 12 | 7 |
| Valley | 13 | 11 | 13 | 14 | 14 | 12 | 12 | 8 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-2°
|
-4°
|
-5°
|
-5°
|
-3°
|
-3°
|
-4°
|
-4°
|
| 300m |
-1°
|
-3°
|
-4°
|
-4°
|
0°
|
0°
|
-4°
|
-4°
|
| Valley |
0°
|
-2°
|
-4°
|
-3°
|
1°
|
1°
|
-3°
|
-3°
|
| Freezing Level |
200m
|
0m
|
0m
|
0m
|
100m
|
200m
|
0m
|
0m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-8°
|
-10°
|
-12°
|
-12°
|
-9°
|
-9°
|
-10°
|
-9°
|
| 300m |
-4°
|
-6°
|
-8°
|
-7°
|
-3°
|
-3°
|
-6°
|
-6°
|
| Valley |
-3°
|
-5°
|
-7°
|
-7°
|
-2°
|
-2°
|
-6°
|
-6°
|
Additional weather information
Meteorologist's view
Bitterly cold at despite the sunshine and easing winds with warm clothing essential. Surfaces frozen at all levels.
Weather
Any remaining snow showers soon clearing then a dry and largely clear night. A dry and very cold day with almost unbroken sunshine, just small amounts of cloud, mainly above the summits. Remaining dry and clear through the evening.
Chance of cloud-free hill tops
90%
Low cloud and visibility
Only small amounts above about 600-750m. Away from any cloud visibility excellent with good panoramic views of surrounding hills, but around a kilometre in any early snow showers.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.2mm | 1mm | 4mm |
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
Cloud increasing overnight with perhaps a few light snow flurries. Some early brightness but generally a rather cloudy day with patchy light sleet or snow. The precipitation becoming more persistent through the late afternoon and evening and, below about 600m, turning increasingly to rain.
Chance of cloud-free hill tops
Around 75% at first falling to 40% by early afternoon and near zero in evening.
Maximum wind speed expected
Westerly or southwesterly 10mph increasing 20-25mph through the afternoon
Temperature
- At 600m Around minus 5 Celsius rising to plus 1 by early afternoon
- Valley Around minus 4 or 5 Celsius through the early hours rising to plus 5 Celsius by day
- Freezing level Less than 300m, rising to 750m through the afternoon and evening.
Low cloud and visibility
Occasional cloud above 600-750m becoming periods above 450-600m by early afternoon and persistent through the evening. Away from cloud visibility good falling to several kilometres in rain and sleet and around a kilometre in snow.
Mountain weather information
Wed 7 Jan
Sunrise:
Sunset:
Dry with long clear or sunny spells but outbreaks of rain, sleet and snow spreading east in late afternoon. Occasionally fresh northwesterly winds, becoming southwesterly later. Freezing level around 600-750m.
Thu 8 Jan
Sunrise:
Sunset:
Overnight rain, sleet and summit snow clearing to leave a rather cloudy day with outbreaks of rain, preceded by sleet and snow, from mid-afternoon. Westerly winds easing, turning easterly later. Freezing level around 750m and rising.
Fri 9 Jan
Sunrise:
Sunset:
Low confidence, at present cloudy with outbreaks of heavy rain, perhaps summit snow, but drier later as winds turn more northwesterly. However small risk of very wet and windy conditions
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.