Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for cold, largely dry weather initially and again later Lower confidence for details and timing of the brief milder, wetter interlude on Tuesday, and for the extent of any snow showers that follow later in the week.
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 and cold, with a brisk breeze. Long sunny spells developing.
| Time | 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% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
NE
19
|
NE
21
|
NE
17
|
NE
18
|
NE
17
|
NE
14
|
| 300m |
NE
11
|
NE
13
|
NE
11
|
NE
10
|
NE
8
|
NE
6
|
| Valley |
NE
9
|
NE
11
|
NE
10
|
NE
9
|
NE
6
|
NE
4
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 24 | 28 | 22 | 24 | 24 | 22 |
| 300m | 22 | 24 | 20 | 20 | 18 | 15 |
| Valley | 20 | 23 | 19 | 18 | 17 | 12 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
6°
|
5°
|
4°
|
4°
|
2°
|
2°
|
| 300m |
7°
|
6°
|
7°
|
7°
|
4°
|
3°
|
| Valley |
8°
|
8°
|
8°
|
7°
|
5°
|
4°
|
| Freezing Level |
1,900m
|
1,600m
|
1,100m
|
900m
|
800m
|
700m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
1°
|
-1°
|
-1°
|
-1°
|
-3°
|
-3°
|
| 300m |
4°
|
3°
|
4°
|
3°
|
2°
|
1°
|
| Valley |
5°
|
4°
|
5°
|
5°
|
3°
|
2°
|
Additional weather information
Meteorologist's view
A good day for warm layers, with sub-zero temperatures on the summits, and feeling colder when exposed to the brisk breeze. However, with the right clothing, conditions will be excellent, with some wide-ranging views to be found.
Weather
Cloud will likely be obscuring modest summits at first, but gradually clearing through the morning. Otherwise a fine and bright, but cold day with long spells of sunshine developing. Cloud increasing a little during the evening.
Chance of cloud-free hill tops
Near 100%, falling to 90% during the evening.
Low cloud and visibility
Some cloud on hills above 400m during the morning, but lifting and dispersing by the afternoon. Then largely cloud-free, before a few patches potentially return to hills above 700m during the evening. Excellent visibility expected with good panoramic views.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.4mm | 29mm | 30.2mm |
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 very cold day, but widely dry and sunny. Brisk winds will lead to a notable wind chill.
Chance of cloud-free hill tops
Close to 100%, falling to 90% early and late.
Maximum wind speed expected
Northerly 20mph at first decreasing to 10mph or less by early afternoon.
Temperature
- At 600m Zero Celsius
- Valley Zero Celsius rising to Plus 8 Celsius
- Freezing level 700m
Low cloud and visibility
Little to no cloud expected below summit level. Patches of cloud could obscure the odd summit above 600m through early hours and again during the evening. Visibility very good or excellent.
Mountain weather information
Tue 18 Nov
Sunrise:
Sunset:
Rain, perhaps brief sleet on highest hills, clearing through the morning with freezing level above summits. Showers and brighter spells follow, with winds also strengthening. Evening showers perhaps falling as snow above 700m later, with freezing level gradually falling to be around 800m.
Wed 19 Nov
Sunrise:
Sunset:
Snow showers across far western parts, perhaps to sea level at first, but turning to rain below 400m through the morning, as freezing levels rise to around 600m. Otherwise cold, dry and sunny. Brisk winds.
Thu 20 Nov
Sunrise:
Sunset:
Risk of the odd snow shower in far west, mainly at first, otherwise a dry day with long clear or sunny spells. Very cold again but winds easing. Freezing level around 300m.
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.