Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for a lot of dry and bright weather on Saturday then turning much more unsettled for a few days. Lower confidence for daily rain or snow details so please keep updated on this forecast.
This evening forecast
Cloudy with showers or longer spells of rain, falling as snow above 400m. Strong westerly winds and a severe wind chill on the tops. Freezing level 600m.
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.
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.
Mountain weather forecast
Mainly dry and bright during daytime. Isolated wintry showers early and late. Cold and breezy.
| 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% | 30% | 30% | 10% | 10% | 20% | 30% | 30% |
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
12
|
NW
11
|
W
9
|
NW
10
|
W
9
|
W
11
|
SW
10
|
SW
10
|
| 300m |
W
6
|
W
5
|
W
5
|
W
6
|
W
7
|
W
9
|
SW
6
|
SW
6
|
| Valley |
W
5
|
W
5
|
W
5
|
W
5
|
W
6
|
W
7
|
W
4
|
SW
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 | 18 | 14 | 14 | 13 | 16 | 16 | 16 |
| 300m | 14 | 14 | 12 | 12 | 12 | 16 | 14 | 14 |
| Valley | 13 | 13 | 11 | 11 | 12 | 14 | 10 | 13 |
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°
|
0°
|
2°
|
4°
|
4°
|
2°
|
1°
|
| 300m |
2°
|
1°
|
1°
|
4°
|
7°
|
7°
|
4°
|
2°
|
| Valley |
2°
|
2°
|
1°
|
5°
|
8°
|
8°
|
5°
|
3°
|
| Freezing Level |
600m
|
700m
|
600m
|
600m
|
600m
|
700m
|
700m
|
700m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-5°
|
-4°
|
-4°
|
-3°
|
0°
|
0°
|
-2°
|
-3°
|
| 300m |
-1°
|
-1°
|
-1°
|
2°
|
5°
|
4°
|
2°
|
0°
|
| Valley |
0°
|
-1°
|
-1°
|
3°
|
6°
|
6°
|
3°
|
1°
|
Additional weather information
Meteorologist's view
Good hillwalking conditions on Saturday but be prepared for cold and possibly icy conditions on the tops.
Weather
Clear spells and isolated wintry showers overnight and to start the morning. These will soon die out to leave a dry day with good sunny spells but still feeling cold at height. Mainly dry with clear spells and the odd wintry shower in the evening.
Chance of cloud-free hill tops
Mostly 90%, but 60% at first and again in the evening.
Low cloud and visibility
Mainly excellent visibility during the day. Some brief reductions in showers at first, then again in the evening, with patchy cloud above 500m.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 34.2mm | 45.8mm | 56.8mm |
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 and outbreaks of light rain arriving overnight, briefly falling as sleet on highest summits. Rain clearing east during the morning followed by blustery showers, some heavy with hail and thunder. Showers becoming wintry later above 500m. Strong and gusty winds.
Chance of cloud-free hill tops
10% at first, becoming 70%.
Maximum wind speed expected
West or SW 25 to 35mph, squally gusts up to 50mph.
Temperature
- At 600m Plus 1C rising to 4C by morning, becoming 0C in evening.
- Valley Plus 3C rising to 8 or 9C during day.
- Freezing level Above summits, falling to 600m in evening.
Low cloud and visibility
Mostly poor visibility with extensive cloud and fog above 400m at first. Visibility improving when rain clears in the morning but occasionally poor in showers with cloud down to 500m at times.
Mountain weather information
Mon 16 Mar
Sunrise:
Sunset:
Showers dying out overnight. A dry, bright and cold day with strong southwest winds on the tops. Outbreaks of rain, preceded by summit snow, will spread east in the evening. Freezing level 600m, rising above summits in evening.
Tue 17 Mar
Sunrise:
Sunset:
Low cloud with patchy rain or drizzle in the morning accompanied by strong southwesterly winds. Drier with a little brightness in the afternoon. Much milder with freezing level well above summits.
Wed 18 Mar
Sunrise:
Sunset:
High pressure is expected to bring more settled conditions with light winds. Some patchy low cloud around. Remaining fairly mild but overnight frost is possible.
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.