Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High confidence in changeable conditions, low for cloud details and timings of rain.
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.
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.
Mountain weather forecast
Cloudy at first, improving to become fine and dry, with sunny spells.
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | <05% | 20% | 20% | 20% | 20% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
N
12
|
N
13
|
N
12
|
NW
12
|
NW
12
|
NW
10
|
| 300m |
N
4
|
N
7
|
NW
8
|
NW
9
|
NW
9
|
NW
5
|
| Valley |
NW
2
|
N
6
|
N
8
|
NW
9
|
NW
8
|
NW
5
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 15 | 17 | 17 | 17 | 17 | 15 |
| 300m | 8 | 12 | 15 | 16 | 16 | 12 |
| Valley | 6 | 12 | 15 | 16 | 17 | 13 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
8°
|
10°
|
11°
|
11°
|
11°
|
9°
|
| 300m |
10°
|
14°
|
15°
|
15°
|
14°
|
11°
|
| Valley |
11°
|
14°
|
16°
|
16°
|
15°
|
12°
|
| Freezing Level |
2,200m
|
2,400m
|
2,300m
|
2,400m
|
2,400m
|
2,500m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
5°
|
7°
|
9°
|
9°
|
8°
|
7°
|
| 300m |
10°
|
12°
|
13°
|
13°
|
12°
|
10°
|
| Valley |
11°
|
13°
|
14°
|
14°
|
13°
|
11°
|
Additional weather information
Meteorologist's view
Strong sun and high UV levels also likely in any brightness through the middle of the day. Therefore it is advisable to put on sun cream if spending any length of time walking or hiking on the hills.
Weather
Largely cloudy with some brighter spells at times but also the risk of the odd shower, these tending to be fairly light. Winds fairly light but feeling somewhat cooler.
Chance of cloud-free hill tops
80%.
Low cloud and visibility
Patchy cloud covering hills above 500m in the morning with cloud then lifting above the peaks. Very good visibility, poor in any isolated showers.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.6mm | 0.6mm | 0.6mm |
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
Dry with clear spells overnight, before turning increasingly cloudy from the west by dawn, with outbreaks of showery rain. A band of showery rain, locally heavy, will move eastwards during Monday morning, clearing by midday. Becoming drier and brighter, with some brief sunnier spells developing in the afternoon. Turning cloudy from the west by evening, with outbreaks of patchy light rain and drizzle at times.
Chance of cloud-free hill tops
30% during the morning and late in the day. Generally 70% during the middle part of the day.
Maximum wind speed expected
West-northwesterly 10-15mph gusts 20-25mph
Temperature
- At 600m Plus 7 Celsius, becoming Plus 10 Celsius.
- Valley Plus 12 Celsius, becoming Plus 18 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Cloud base lowering to 500m in showery rain during the morning, lifting to above the summits after midday. Then again lowering to 500m in rain and drizzle by the evening. Visibility will be poor at times, especially in low cloud and rain. Otherwise, generally good or very good visibility.
Mountain weather information
Tue 2 Jul
Sunrise:
Sunset:
A cloudy and damp start. Otherwise, a largely fine and dry day, with variable amounts of cloud and bright or sunny spells. Gentle northwesterly winds. Temperatures will be near the average for the time of year.
Wed 3 Jul
Sunrise:
Sunset:
After a dry and bright start, a band of cloud and outbreaks of showery rain will move southeastwards during the afternoon. Rain clearing by the evening, leaving a fine end to the day. Breezy at first, easing later. Remaining on the cool side.
Thu 4 Jul
Sunrise:
Sunset:
Fine and dry with bright or sunny spells throughout the day. Feeling pleasant in the sunshine, with light northwesterly winds.
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.