Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for remaining unsettled, but lower for details, especially from Tuesday.
This evening forecast
Rather cloudy with occasional rain. Occasionally fresh southwesterly winds easing.
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.
Blizzards
Blizzards and whiteouts present challenging and serious conditions due to a combination of falling or blowing snow, strong winds and cold temperatures. They can be highly disorientating, often resulting in near-zero visibility with limited or no visual references and no distinction between ground and sky. Cliff edges and cornices may not be apparent, even close up. These conditions require very good navigational skills.
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
Rather cloudy with outbreaks of rain developing. Mainly light 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) |
40% | 30% | 20% | 20% | 80% | 80% | 10% | <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 |
SW
11
|
S
10
|
SW
9
|
SW
6
|
W
8
|
NW
12
|
W
9
|
N
6
|
| 300m |
SW
6
|
S
6
|
SW
5
|
S
4
|
W
6
|
W
7
|
W
5
|
SW
4
|
| Valley |
SW
5
|
S
3
|
W
2
|
S
2
|
W
5
|
W
7
|
W
5
|
SE
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 | 15 | 15 | 12 | 9 | 12 | 16 | 13 | 10 |
| 300m | 15 | 14 | 12 | 8 | 11 | 14 | 10 | 7 |
| Valley | 15 | 11 | 9 | 6 | 10 | 14 | 10 | 7 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
4°
|
4°
|
4°
|
4°
|
3°
|
2°
|
1°
|
| 300m |
6°
|
5°
|
6°
|
6°
|
7°
|
5°
|
3°
|
2°
|
| Valley |
6°
|
5°
|
6°
|
6°
|
7°
|
6°
|
4°
|
2°
|
| Freezing Level |
1,200m
|
1,200m
|
1,200m
|
1,200m
|
1,100m
|
900m
|
800m
|
800m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
0°
|
0°
|
1°
|
1°
|
1°
|
-2°
|
-2°
|
-2°
|
| 300m |
4°
|
3°
|
4°
|
4°
|
5°
|
3°
|
1°
|
0°
|
| Valley |
4°
|
4°
|
4°
|
5°
|
6°
|
4°
|
2°
|
0°
|
Additional weather information
Meteorologist's view
Significant chill developing despite easing winds.
Weather
Cloudy with patchy rain overnight. Then a rather cloudy morning with a few spots of rain, the rain becoming more persistent through the late morning and early afternoon, perhaps turning to snow over the higher summits. The precipitation clears east from late afternoon to leave a dry evening with long clear spells developing.
Chance of cloud-free hill tops
Around 25% becoming near zero from late morning, improving to 90% through the late afternoon and evening.
Low cloud and visibility
Periods or persistent cloud above about 450-600m, with patches below, becoming just small amounts below summit level through the late afternoon and evening. Away from cloud visibility generally rather hazy falling to several kilometres in rain and perhaps less than a kilometre in snow, becoming very good later.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 19.8mm | 31.4mm | 32mm |
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
Dry with long clear spells through the early hours but cloud soon increasing in the morning to leave a rather cloudy but mainly dry day. During the evening outbreaks of rain will spread across the area, preceded briefly by snow on the higher summits.
Chance of cloud-free hill tops
Around 75% at dawn gradually becoming 40% through the day then falling through the evening.
Maximum wind speed expected
Easterly 10mph or less increasing 25-30mph through the morning, with gusts around 45mph over ridges and summits.
Temperature
- At 600m Around plus 1 Celsius rising to plus 4 Celsius in evening
- Valley Around zero Celsius at dawn rising to plus 7 or 8 Celsius by day
- Freezing level 700m rising above the summits through the evening.
Low cloud and visibility
Occasional or periods of cloud above 600-750m, becoming more persistent and lowering to 450-600m at times through the evening. Away from cloud visibility Good or very good, falling to several kilometres in rain and perhaps a kilometre in snow.
Mountain weather information
Tue 3 Feb
Sunrise:
Sunset:
Mostly cloudy with outbreaks of rain, perhaps sleet or snow on highest summits. Occasionally strong easterly winds easing through the afternoon. Freezing level just above the summits.
Wed 4 Feb
Sunrise:
Sunset:
Rather cloudy with outbreaks of rain at first and again later, with some brighter, drier spells through the middle of the day. Mainly light winds, increasing later. Freezing level just above the summits.
Thu 5 Feb
Sunrise:
Sunset:
Cloudy with outbreaks of occasionally heavy rain, clearing through the afternoon. Occasionally strong easterly winds easing. Freezing level above summits.
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.