Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for dry and fine through Friday and Saturday and a change to more unsettled conditions thereafter, but lower for amount of cloud above the summits next couple of days and timing of arrival of rain later Sunday.
This evening forecast
Dry and largely clear, any cloud expected to be above the summits. Light winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.
Mountain weather forecast
Dry with long sunny spells. 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) |
00% | 00% | 00% | 00% | 00% | 00% | 00% | 00% |
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 |
E
8
|
E
8
|
E
6
|
E
5
|
E
7
|
E
6
|
E
6
|
E
5
|
| 300m |
E
2
|
E
2
|
E
2
|
NE
3
|
E
5
|
E
5
|
E
3
|
E
1
|
| Valley |
N
2
|
N
1
|
NW
2
|
E
3
|
E
5
|
SE
5
|
SE
3
|
N
1
|
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 | 14 | 12 | 10 | 10 | 10 | 9 | 9 | 8 |
| 300m | 5 | 5 | 5 | 7 | 10 | 8 | 6 | 3 |
| Valley | 6 | 5 | 6 | 6 | 9 | 9 | 6 | 3 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
6°
|
5°
|
4°
|
6°
|
9°
|
10°
|
8°
|
6°
|
| 300m |
4°
|
2°
|
1°
|
7°
|
12°
|
13°
|
9°
|
5°
|
| Valley |
4°
|
2°
|
2°
|
8°
|
13°
|
14°
|
10°
|
6°
|
| Freezing Level |
1,200m
|
1,200m
|
1,100m
|
1,000m
|
1,000m
|
1,100m
|
1,200m
|
1,200m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
3°
|
2°
|
4°
|
8°
|
9°
|
7°
|
4°
|
| 300m |
3°
|
1°
|
0°
|
6°
|
11°
|
12°
|
9°
|
4°
|
| Valley |
3°
|
1°
|
0°
|
7°
|
12°
|
13°
|
10°
|
5°
|
Additional weather information
Meteorologist's view
Low level temperatures around zero Celsius at dawn rising to around 15 or 16 Celsius by day.
Weather
Dry with long clear and sunny spells. Risk of a few low level mist and fog patches around dawn.
Chance of cloud-free hill tops
Close to 100%
Low cloud and visibility
Little or no cloud expected below summit level. Visibility perhaps locally less than a kilometre in any early low level mist and fog, otherwise very good or excellent with good panoramic views of surrounding hills and mountains.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 3.2mm | 7.8mm |
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
Another fine, dry day with long clear or sunny spells, once again risk of a few early low level mist or fog patches and the sunshine may be rather hazy at times.
Chance of cloud-free hill tops
Close to 100%
Maximum wind speed expected
Variable less than 10mph.
Temperature
- At 600m Around plus 5 Celsius, rising to plus 11 Celsius by day
- Valley Around zero Celsius at dawn rising to plus 16 Celsius by day
- Freezing level Above the summits
Low cloud and visibility
Little or no cloud expected below summit level. Visibility perhaps locally less than a kilometre in any early low level mist and fog, otherwise very good or excellent with good panoramic views of surrounding mountains.
Mountain weather information
Sun 22 Mar
Sunrise:
Sunset:
Remaining dry with clear or sunny spells but cloud increasing later in the day. Mainly light winds. Freezing level above summits.
Mon 23 Mar
Sunrise:
Sunset:
Cloud and overnight rain clearing then mainly dry with sunny spells. Occasionally fresh northwesterly winds easing. Freezing level falling to 600m.
Tue 24 Mar
Sunrise:
Sunset:
Cloudy with outbreaks of rain, persistent and heavy at times. Strong southwesterly winds. Freezing level rising 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.