
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High confidence for Storm Amy to bring very windy conditions through later Friday and Saturday but some uncertainty in timings of rain. High for unsettled and often wet conditions next week.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Gales
Poor Visibility
Heavy Persistent Rain
Storm Force Winds
Mountain weather forecast
A dry start then becoming wet and very windy.
Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
20% | 20% | 70% | >95% | >95% | 80% |
Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|
600m |
SW
17
|
SW
18
|
S
28
|
SW
35
|
SW
38
|
SW
36
|
300m |
SW
8
|
SW
9
|
SW
15
|
SW
21
|
SW
23
|
SW
22
|
Valley |
SW
5
|
SW
8
|
SW
11
|
SW
17
|
SW
19
|
SW
19
|
Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|
600m | 21 | 22 | 36 | 46 | 50 | 48 |
300m | 19 | 19 | 30 | 43 | 47 | 44 |
Valley | 17 | 18 | 26 | 38 | 43 | 43 |
Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|
600m |
12°
|
12°
|
12°
|
12°
|
13°
|
13°
|
300m |
13°
|
14°
|
15°
|
14°
|
15°
|
15°
|
Valley |
14°
|
15°
|
16°
|
15°
|
16°
|
15°
|
Freezing Level |
2,300m
|
2,600m
|
3,400m
|
3,700m
|
3,800m
|
4,000m
|
Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|
600m |
9°
|
9°
|
8°
|
7°
|
8°
|
8°
|
300m |
12°
|
13°
|
12°
|
11°
|
11°
|
11°
|
Valley |
13°
|
14°
|
14°
|
12°
|
13°
|
12°
|
Additional weather information
Meteorologist's view
Conditions will deteriorate quickly during the afternoon. Walking will become arduous with a high risk of being blown over from gusts of 60 to 70mph on high ridges and summits above 600m from late afternoon onwards.
Weather
A dry start with a little brightness. Cloud and rain will quickly spread east from mid-morning, turning heavy and persistent in the afternoon with drenching conditions later in the day. Becoming very windy with a low risk of storm force winds developing on high ridges and summits during the evening.
Chance of cloud-free hill tops
40% becoming 10% from late morning.
Low cloud and visibility
Occasional cloud above 400-600m in the morning becoming extensive above 300-400m in afternoon. Visibility occasionally good at first, but poor in rain and very poor in low cloud covering the hills.
Recent rainfall
Last 24 hours | Last 48 hours | Last 72 hours |
---|---|---|
7mm | 7.2mm | 7.2mm |
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
Rain clearing overnight then bright or clear spells and showers, some heavy. Remaining very windy with sudden strong gusts making walking very difficult with high risk of being blown over. Feeling cold on the tops.
Chance of cloud-free hill tops
70%.
Maximum wind speed expected
Westerly 35-45mph with gusts 60 to 70 mph.
Temperature
- At 600m Plus 7 or 8C.
- Valley Plus 5C becoming plus 13C.
- Freezing level Above summits.
Low cloud and visibility
Occasional cloud above 600m giving very poor visibility, poor at times in showers. Occasionally good between showers.
Mountain weather information
Sun 5 Oct
Cloudy with outbreaks of mostly light rain or drizzle and strong westerly winds. Risk of gales on high slopes. Freezing level above summits.
Mon 6 Oct
Cloudy with outbreaks of rain and strong westerly winds. Risk of gales on high slopes. Freezing level above summits.
Tue 7 Oct
Further spells of rain are likely. Winds may ease.
Summit specific forecast
Mountain summit forecast map
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.