Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for mainly dry weather with limited showers Tuesday, then generally more unsettled from Wednesday, but lowering for detail of intensity and timing of worst of the weather.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Mountain weather forecast
Any early rain clearing to sunny spells and isolated showers. More persistent rain moving in during the evening.
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
Weather (at 600m) |
||||||
Chance of precipitation (at 600m) |
30% | 10% | 10% | 20% | 40% | 80% |
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
600m |
SW
22
|
SW
14
|
SW
14
|
SW
11
|
SW
9
|
SE
10
|
300m |
SW
13
|
SW
9
|
SW
10
|
SW
8
|
SW
4
|
SE
3
|
Valley |
SW
12
|
W
7
|
SW
9
|
SW
7
|
SW
2
|
SE
2
|
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
600m | 28 | 19 | 19 | 15 | 12 | 13 |
300m | 27 | 17 | 19 | 15 | 9 | 8 |
Valley | 27 | 15 | 18 | 14 | 8 | 6 |
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
600m |
8°
|
8°
|
8°
|
9°
|
8°
|
7°
|
300m |
9°
|
10°
|
12°
|
12°
|
10°
|
9°
|
Valley |
10°
|
11°
|
13°
|
13°
|
10°
|
9°
|
Freezing Level |
1,700m
|
1,700m
|
1,500m
|
1,500m
|
1,500m
|
2,000m
|
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
600m |
3°
|
4°
|
5°
|
7°
|
5°
|
4°
|
300m |
6°
|
8°
|
10°
|
11°
|
10°
|
8°
|
Valley |
7°
|
10°
|
11°
|
12°
|
10°
|
9°
|
Additional weather information
Meteorologist's view
Largely fine, once early cloud lifts, but always the risk of the odd shower. Despite mild temperatures at lower levels and relatively light winds, still chilly on the tops. Conditions also deteriorating by late afternoon with rain and low cloud.
Weather
Any early rain soon clearing. A day of isolated light showers and limited brighter spells then follows. Any sunshine turning rather hazy due to high cloud, however. Low cloud building from late afternoon with rain spreading in after dark
Chance of cloud-free hill tops
40% rising to 80% by late morning. Falling to 30% by dusk.
Low cloud and visibility
Cloud obscuring hills from above 600m during the morning, but lifting and breaking above summits into the afternoon. Low cloud returning from the southwest late afternoon onward, obscuring the odd hill above 600m, with some patches down to 400m. Outside of cloud mostly good visibility through the day, but becoming moderate during rain.
Recent rainfall
Last 24 hours | Last 48 hours | Last 72 hours |
---|---|---|
9.8mm | 20.6mm | 30.2mm |
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
A cloudy and mainly dry day, although occasional but mostly light outbreaks of rain will move into western parts at times. This most likely later in the day. Best of any brighter spells in the east, where it will feel warm at times.
Chance of cloud-free hill tops
30%
Maximum wind speed expected
Variable 15mph or less
Temperature
- At 600m Plus 6 Celsius
- Valley Plus 8 Celsius increasing to Plus 15 Celsius
- Freezing level Above summits
Low cloud and visibility
Extensive low cloud will obscure routes above 600m for much of the day, perhaps down to 400m during any rain. Perhaps the odd break across eastern hills by the afternoon. Outside of cloud, visibility moderate to poor in the early rain, but improving to be good as drier weather moves in.
Mountain weather information
Thu 21 Mar
Cloudy and windy, but mostly dry. Rain spreading south later in the day, turning persistent from across western hills, with southwesterly gales on summits. Freezing level above all peaks.
Fri 22 Mar
Sunshine and showers with blustery winds. Showers frequent and heavy at times, with a risk of hail, and perhaps wintry on the tops above 800m. Freezing level falling, but remaining just above summits.
Sat 23 Mar
Another day of sunshine and showers, with strong blustery wind. Freezing level briefly falling to 600m, with some wintry showers possible, but rising above the summits by midday.
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.