Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for the weather to gradually turn more settled and warm up, after a changeable start to the next few days.
This evening forecast
Bright spells at first, but cloud increasing and lowering to give some fog patches on the hills, especially towards west facing up slopes, where the odd spot of drizzle may also develop. A westerly breeze.
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.
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
Cloudy with fog on the hills and some showery rain at first. Becoming brighter/clearer. Breezy.
| 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) |
10% | 50% | 50% | 30% | <05% | <05% | <05% | <05% |
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 |
SW
17
|
SW
19
|
W
17
|
NW
18
|
NW
19
|
NW
20
|
NW
19
|
NW
17
|
| 300m |
SW
11
|
SW
11
|
W
10
|
NW
12
|
NW
13
|
NW
14
|
NW
12
|
NW
8
|
| Valley |
SW
9
|
SW
10
|
W
10
|
NW
11
|
NW
12
|
NW
13
|
NW
11
|
NW
7
|
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 | 23 | 25 | 23 | 24 | 26 | 28 | 27 | 24 |
| 300m | 22 | 22 | 20 | 22 | 24 | 26 | 23 | 18 |
| Valley | 20 | 21 | 21 | 22 | 24 | 25 | 23 | 18 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
13°
|
12°
|
12°
|
11°
|
11°
|
12°
|
12°
|
10°
|
| 300m |
14°
|
14°
|
13°
|
14°
|
14°
|
15°
|
14°
|
13°
|
| Valley |
15°
|
14°
|
14°
|
14°
|
15°
|
16°
|
15°
|
13°
|
| Freezing Level |
2,700m
|
2,800m
|
2,500m
|
2,500m
|
2,500m
|
2,600m
|
2,300m
|
2,200m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
10°
|
9°
|
8°
|
8°
|
8°
|
8°
|
8°
|
7°
|
| 300m |
13°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
11°
|
| Valley |
14°
|
13°
|
12°
|
13°
|
13°
|
13°
|
13°
|
12°
|
Additional weather information
Meteorologist's view
Fog will make navigation difficult on the hills at first, and then later when the sun appears UV levels are likely to climb into the high category, so it would be advisable to carry some sun cream. Feeling cool in the breeze.
Weather
A cloudy start with some light rain or drizzle and fog covering hills above about 400m. Cloud gradually lifting through the morning, and becoming generally dry. Some brighter breaks developing during the afternoon, especially later, with clear spells after dusk. Breezy, especially on the hill tops.
Chance of cloud-free hill tops
20% or less at first, increasing to 70% or more during the morning, and 80% or more for the afternoon and evening.
Low cloud and visibility
Cloud covering hills above about 400m at first, giving very poor visibility. Cloud bases rising towards the hill tops during the morning, and lifting above them for the afternoon and evening, with the visibility improving to very good or excellent.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 0mm | 0mm |
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
Mostly cloudy at first with some fog patches possible on the hill tops, and perhaps the odd spot of rain. Cloud soon lifting and breaking to give some bright or sunny spells during the day and clear intervals after dusk. Breezy, especially on the hill tops.
Chance of cloud-free hill tops
Around 40-50% at first, soon increasing to 70% or more.
Maximum wind speed expected
North to northwesterly 17 to 22mph, with gusts around 30, perhaps 35 mph.
Temperature
- At 600m PS08C rising to PS14C.
- Valley PS11C rising to PS18C.
- Freezing level Above the summits throughout.
Low cloud and visibility
Cloud covering hills above about 700m at times at first, giving locally poor or very poor visibility. Cloud bases soon lifting above the hills during the morning, and remaining above them for the afternoon and evening, with the visibility improving to excellent.
Mountain weather information
Tue 8 Jul
Sunrise:
Sunset:
Dry with variable cloud and some sunny or clear spells. High UV levels. A west to northwesterly breeze easing. Freezing levels above the summits throughout.
Wed 9 Jul
Sunrise:
Sunset:
Dry with clear or sunny spells and gentle winds. High or very high UV levels. A warmer day. Freezing levels above the summits throughout.
Thu 10 Jul
Sunrise:
Sunset:
Dry with clear or sunny spells and light winds. High or very high UV levels. A warm day. Freezing levels above the summits throughout.
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.