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 precipitation details.
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.
Mountain weather forecast
Mainly dry and bright during daytime hours.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
10% | <05% | <05% | 30% | 40% | 20% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
W
10
|
NW
9
|
NW
8
|
W
11
|
SW
11
|
SW
10
|
| 300m |
W
5
|
W
5
|
W
5
|
W
9
|
SW
8
|
SW
6
|
| Valley |
W
5
|
W
5
|
W
5
|
W
8
|
SW
6
|
SW
4
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 14 | 11 | 11 | 15 | 15 | 16 |
| 300m | 14 | 9 | 10 | 14 | 15 | 14 |
| Valley | 14 | 9 | 10 | 14 | 13 | 13 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
1°
|
1°
|
4°
|
3°
|
2°
|
2°
|
| 300m |
2°
|
4°
|
7°
|
6°
|
4°
|
3°
|
| Valley |
2°
|
5°
|
8°
|
7°
|
5°
|
4°
|
| Freezing Level |
700m
|
600m
|
700m
|
700m
|
700m
|
700m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-4°
|
-3°
|
0°
|
-1°
|
-3°
|
-2°
|
| 300m |
-1°
|
3°
|
6°
|
4°
|
1°
|
0°
|
| Valley |
0°
|
4°
|
7°
|
5°
|
3°
|
2°
|
Additional weather information
Meteorologist's view
Good hillwalking conditions on Saturday but be prepared for cold conditions on the tops.
Weather
Patchy cloud, with early clear intervals and then sunny spells during most daylight hours, then becoming cloudier later. Largely cloudy this evening with a few light showers, these wintry over the highest tops.
Chance of cloud-free hill tops
Mostly 90%, but 60% at first.
Low cloud and visibility
Mainly excellent visibility during the day, but some brief reductions in showers this evening. Patchy cloud above 500m at first, otherwise cloud mostly above the summits.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 4mm | 47.8mm | 47.8mm |
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
Thicker cloud and outbreaks of light rain arriving by the end of the night, perhaps briefly falling as sleet on highest summits. Rain clears east early afternoon followed by broken cloud and blustery showers, some heavy with hail and thunder. Showers possibly becoming wintry later over the highest summits. Strong and gusty winds.
Chance of cloud-free hill tops
Decreasing 20% late in the night, then improving 90% from early afternoon.
Maximum wind speed expected
West or southwest 25 to 30mph, squally gusts up to 45mph.
Temperature
- At 600m Plus 1C rising to 7C for the afternoon, becoming 1C in evening.
- Valley Plus 3C rising to 8 or 9C during day.
- Freezing level Above summits, falling to close to summits in the evening.
Low cloud and visibility
Mostly poor visibility with only near-by hills visible, and extensive cloud and fog above 500m, through the morning. Visibility improving to excellent after rain clears, although occasionally decreases poor in showers.
Mountain weather information
Mon 16 Mar
Sunrise:
Sunset:
Overnight showers, some heavy, wintry above 600m. These mostly die away through the morning then bright and cold with strong southwest winds on the tops. Outbreaks of rain, preceded by summit snow, will spread east during the afternoon. Freezing level summits.
Tue 17 Mar
Sunrise:
Sunset:
Low cloud with patchy rain or drizzle accompanied by southwesterly gales on the tops. Perhaps 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.