7 Day Forecast for Brecon Beacons NP
Sunset: 17:59.
Dusk: 18:34.
Moon: 64% (dusk to 00:42)
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Met Office Forecast
Wales
Wet and windy today with gales in coastal areas.
Today:
Cloudy and increasingly wet this morning as a band of rain, heavy at times moves across the country. Rain should clear east this afternoon with showers following. Windy with severe gales along the coast this morning. Less blustery later. Maximum Temperature 15C.
Tonight:
Further showers this evening, turning heavy and possibly thundery. These will continue overnight too but mixed in with some clearer and drier spells, especially in the east. Still rather windy. Minimum Temperature 7C.
Sunday:
A mixture of sunshine and blustery showers, possibly heavy, on Sunday. Windy, but less so than Saturday. Maximum Temperature 13C.
Outlook for Monday to Wednesday:
Sunshine and showers on Monday, with risk of thunder. A band of rain arriving on Tuesday and spreading across the country. Bright spells and showers again on Wednesday. Windy throughout.
Day 6-7 and Week 2:
Unsettled conditions are expected to dominate for the rest of October, with blustery rain and showers interspersed with occasional sunny spells across the UK. Strong winds are also likely with a risk of gales at times. The wettest and windiest weather is most likely to be seen in the north and west of the UK whilst the best of any drier or brighter weather is likely to be across the south and east. A change to generally drier, more settled and perhaps milder conditions is expected for the start of November with any strong winds, showers or longer spells of rain most likely confined to northern areas. Elsewhere winds will probably become light. These more settled conditions bring an increased risk of overnight frost and fog, particularly across the south.
Week 3 and 4:
For the remainder of November, it is likely to be a tale of 2 halves. The start of this period looks set to see high pressure dominate, bringing more settled than seen in recent times, particularly for the south with any wet and windy weather most likely to affect the north-west. Although confidence lowers toward the end of November, a return to unsettled autumnal weather is most likely, with showers or longer spells of rain and strong winds, interspersed with drier intervals. Overall, temperatures are anticipated to be at or below average for this time of year.
Met Office : Wales : 2020-10-24T01:49:46
Daylight : Brecon Beacons NP
Day length is dusk to dawn. Times will vary a little if there is a hill on the horizon.
It should still be light enough to read at dawn and dusk, so there will be enough light for walking even earlier (later).
Moonlight : Brecon Beacons NP
Notes
- The moon's phase or fracillum (percentage of the moon illuminated) doesn't vary much with location.
- A full moon is not just bigger, its much brighter. A half moon ('50%') give less than 5% of the illumination of a full moon. You can walk with a half moon if its high in the sky (after dusk for a growing moon, before dawn for a shrinking moon).
- Sky glow (light reflected by air or clouds) from nearby cities, and especially snow on the ground also effect light levels.
- Times will vary a few minutes, as (i) these figures are for the centre of the county the walk is in, (ii) if there are hills on the horizon, and (iii) if you are on a hill
- Of course, you need a cloudless night as well!
Met Office Mountain Forecast
Issued: 0600 on 2020-10-24 for Brecon Beacons
| Today
|
A mostly wet and windy day.
| Summary | A mostly dry but cloudy start to Saturday morning, but rain will soon spread from the west with heavy and prolonged rain by lunchtime and difficult conditions as winds also increase. Rain continuing into early evening then followed by occasional showers, these heavy with risk of hail and thunder.
| | Chance of Cloud free tops | Little chance most of the day with persistent cloud down to 400 or 500m.
| | Ground conditions |
| | Visibility | Moderate but often poor in rain and very poor at height with cloud down onto lower slopes
|
Storm Force Winds: Low Likelihood
Gales: High Likelihood
Poor Visibility: High Likelihood
Thunderstorms: Low Likelihood
Heavy Persistent Rain: High Likelihood
|
| 06 | 07 | 08
| 09 | 10 | 11
| 12 | 13 | 14
| 15 | 16 | 17
| 18 | 19 | 20
| 21 | 22 | 23
|
| Weather
| Heavy Rain
| Heavy Rain
| Heavy Rain
| Heavy Rain
| Heavy Rain
| Light rain showers (night)
|
| Rain
| 30%
| 70%
| 90%
| 80%
| 60%
| 70%
|
| Temp (tops)
| 8
| 10
| 8
| 8
| 7
| 6
|
| Wind (tops)
| 36
| 34
| 22
| 19
| 20
| 19
|
| Freezing Level
| 2400m
| 2200m
| 2200m
| 1800m
| 1700m
| 1400m
|
|
| Day 1
| Bright spells and blustery showers, some heavy with risk of hail and thunder, with rather frequent showers in the west.
| Ice | Above the tops
| | Visibility | Good or very good, but only a few kilometres in showers
| | Wind | Southwest 25 gust 35mph, but 30-35 gust 50mph over higher slopes in showers
| | Temp | Plus 5 C (at high level)
|
|
| Day 2
| Some bright spells, but with occasional showers, still some heavy but mainly dry by evening with fresh to strong southwest winds turning west.
|
| Day 3
| A cloudy, rather wet and windy day, but gradually becoming brighter in afternoon with rain turning to showers as strong to gale force southerly winds turn southwest and ease a touch. Showers may turn wintry over the tops as freezing level falls close to the summits later
|
| Day 4
| A mostly cloudy day with rain or showers, some heavy with perhaps hail and thunder too, but freezing level will rise.
|
Data: Met Office