7 Day Forecast for Brecon Beacons NP
Moon: 14% (dusk to 19:52)
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Met Office Forecast
Wet and windy tonight with some sunny spells tomorrow.
This Evening and Tonight:
A rather windy night, with a risk of gales in coastal and exposed areas. Outbreaks of rain in the north to begin easing, then further rain spreading across the country later in the period, but largely dry by dawn. Minimum Temperature 8C.
Dry for many through the morning, although showery rain will arrive along the north coast in the afternoon and later in the south. Feeling mild but remaining rather windy. Maximum Temperature 17C.
Outlook for Wednesday to Friday:
Changeable conditions throughout the period. Winds easing on Wednesday. A showery picture for Wednesday and Thursday, followed by further rain arriving from the west on Friday.
Day 6-7 and Week 2:
Rather unsettled conditions are expected to dominate the period, with outbreaks of rain and blustery showers in many parts of the UK, though the extent of which is low at this time. The focus for the heaviest and most frequent rain is across western areas, whilst rather windy conditions particularly in the northwest at times may pose a risk of gales or even severe gales mainly around coastal areas. Intermittent brighter and drier spells may also last for a time in all parts of the UK, with most of the more settled conditions perhaps most likely in eastern and south-eastern parts. Overall, temperatures looking to be generally close to or a little below normal for the time of year.
Week 3 and 4:
Confidence is low for this period, but the generally unsettled wet and windy theme is expected to gradually transition to a more settled picture through early November, especially in the south of the UK. Elsewhere, showery and windier conditions may remain more prevalent in the north. Temperatures may dip slightly below normal in the more settled periods, allowing for an increasing likelihood of overnight frost and fog developing.
Met Office : Wales : 2020-10-19T13:30:21
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
- 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: 1800 on 2020-10-19 for Brecon Beacons
Sunshine and showers, these turning heavy and frequent from late afternoon.
|Summary ||Band of occasionally heavy rain crossing from the west overnight, which clears to showers before dawn. Sunshine and a few isolated showers through the morning. Cloud increasing during the afternoon with showers turning frequent from late afternoon, margining to periods of occasionally heavy rain through the evening, bringing a risk of hail and thunder.
|Chance of Cloud free tops ||90% at first, then 10% for late afternoon as bases become quite extensive from 450-700m.
|Ground conditions ||
|Visibility ||Good falling moderate or poor in showers and rain, and very poor in hill fog.
Gales: High Likelihood
Poor Visibility: Low Likelihood
Thunderstorms: Medium Likelihood
||Partly cloudy (night)
||Heavy rain showers
Rather cloudy with frequent showers or longer periods of rain at first, clearing to sunshine and scattered, lighter showers from mid-day.
|Ice ||Above summits
|Visibility ||Good becoming moderate or poor in rain or showers.
|Wind ||Southwest 15-20mph
|Temp ||Plus 6-8 Celsius (at high level)
Mainly dry with only a few isolated light showers cropping up. Freezing level above summits.
Active band of rain crossing from the west, clearing to sunshine and showers later. Freezing level above summits.
Rather cloudy with showers or longer periods of rain. Strong summit winds. Freezing level above summits.
Data: Met Office