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Llyn Y Fan Fawr

Llyn Y Fan Fawr last 24 hours
  • 19°C 14°C
    Sunny day
  • 16°C 8°C
    Cloudy
  • 15°C 10°C
    Cloudy
  • 14°C 7°C
    Cloudy
  • 14°C 6°C
    Sunny intervals
  • 14°C 7°C
    Cloudy
Friday   (26 May 2017)
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Clear night Clear night Clear night Clear night Clear night Clear night Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Sunny day Clear night Clear night
Temperature (°C)
15 15 16 15 15 14 14 14 14 15 16 17 17 18 18 19 19 19 18 18 17 16 16 16
Feels like temperature (°C) arrow down
10 11 11 10 10 10 10 10 10 11 12 12 13 13 13 13 13 14 13 13 13 12 11 11
Precipitation probability arrow down
<5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5% <5%
Wind direction, speed & gust (mph) arrow down
SE 25 35 SE 27 36 SE 25 36 SE 25 37 SE 24 37 SE 24 36 SE 24 36 SE 23 34 SE 22 30 SE 21 28 SE 21 28 SE 22 29 SE 23 31 SE 23 32 SE 23 32 SE 23 33 SE 23 32 SE 22 31 SE 22 31 SE 22 29 SE 22 31 SE 22 32 SE 24 34 SE 24 35
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G VG VG VG VG VG VG VG VG VG G VG VG VG VG VG VG VG VG VG VG VG VG VG
Humidity arrow down
94% 85% 78% 76% 75% 75% 74% 77% 79% 79% 78% 75% 71% 69% 65% 61% 59% 60% 61% 64% 68% 70% 71% 74%
UV index arrow down
0 0 0 0 0 0 1 1 2 4 5 6 7 8 7 6 5 3 2 1 1 1 0 0
Saturday   (27 May 2017)
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Clear night Clear night Clear night Heavy shower day Cloudy Cloudy Cloudy Mist Fog
Temperature (°C)
15 15 15 14 15 15 15 12 10
Feels like temperature (°C) arrow down
11 11 11 11 12 12 12 10 8
Precipitation probability arrow down
<5% <5% <5% 80% 40% 10% 20% 20% 20%
Wind direction, speed & gust (mph) arrow down
ESE 23 34 ESE 22 33 ESE 17 27 SE 18 24 SSE 17 24 SSW 18 27 SW 17 25 SW 15 22 SW 13 18
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG VG VG G G G VG P VP
Humidity arrow down
79% 81% 82% 89% 92% 93% 87% 94% 99%
UV index arrow down
0 0 0 1 3 5 4 1 0
Sunday   (28 May 2017)
0100 0400 0700 1000 1300 1600 1900 2200
Fog Fog Mist Cloudy Cloudy Cloudy Light rain Light rain
Temperature (°C)
9 8 8 12 14 15 13 12
Feels like temperature (°C) arrow down
7 7 7 11 14 14 12 10
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20% 20% 20% 10% 10% 10% 50% 60%
Wind direction, speed & gust (mph) arrow down
WSW 10 15 NNW 8 11 N 7 12 NNE 5 12 NNE 4 11 NE 6 12 NNE 7 13 NNE 8 13
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VP VP P VG VG G G M
Humidity arrow down
99% 99% 99% 85% 73% 73% 85% 93%
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0 0 1 4 6 3 1 0
Monday   (29 May 2017)
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Cloudy Cloudy Overcast Overcast Cloudy Cloudy Cloudy Partly cloudy night
Temperature (°C)
10 10 10 10 12 13 12 10
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8 8 8 9 12 13 10 8
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20% 10% 20% 20% 10% 10% 10% 10%
Wind direction, speed & gust (mph) arrow down
NE 11 19 ENE 10 18 NE 9 17 NE 8 15 NE 6 12 NW 5 13 NW 9 17 NNW 9 13
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G M M M M M G VG
Humidity arrow down
94% 95% 96% 94% 89% 85% 88% 90%
UV index arrow down
0 0 1 3 4 3 1 0
Tuesday   (30 May 2017)
0100 0400 0700 1000 1300 1600 1900 2200
Partly cloudy night Partly cloudy night Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny intervals Cloudy
Temperature (°C)
8 7 8 11 13 13 12 9
Feels like temperature (°C) arrow down
6 5 6 9 11 11 10 7
Precipitation probability arrow down
10% 10% 10% 10% 10% 30% 10% 10%
Wind direction, speed & gust (mph) arrow down
NW 9 13 WNW 8 12 NW 9 14 WNW 8 17 WSW 9 21 SW 12 24 W 11 20 SW 9 14
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG VG VG VG VG VG VG VG
Humidity arrow down
93% 92% 93% 84% 73% 74% 80% 92%
UV index arrow down
0 0 1 4 6 4 1 0
Wednesday   (31 May 2017)
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Partly cloudy night Cloudy Cloudy Cloudy Cloudy Cloudy Sunny intervals Cloudy
Temperature (°C)
7 6 7 10 13 13 12 10
Feels like temperature (°C) arrow down
4 4 5 8 11 11 10 8
Precipitation probability arrow down
<5% 10% 10% 10% 10% 10% 10% 10%
Wind direction, speed & gust (mph) arrow down
SSW 9 13 S 8 12 S 8 13 S 9 18 SSW 12 23 SSW 11 22 SSW 11 20 SSW 11 18
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G G G VG VG VG VG VG
Humidity arrow down
94% 96% 94% 81% 73% 74% 77% 87%
UV index arrow down
0 0 1 3 5 3 1 0
More Detail chevron down

Issued at: 0000 on Fri 26 May 2017

Forecast summary

Regional forecast for Wales

Hot and sunny on Friday, some thundery showers this weekend.

This Evening and Tonight:

It will be a fine evening with plenty of late, warm sunshine on offer. A dry night will then follow with clear skies across most areas. It will be a mild night and rather humid for all. Minimum Temperature 11 °C.

Friday:

Friday will be dry, sunny and very warm again for all of us. The sunshine may become a little hazy later in the west as high cloud spreads in. Maximum Temperature 28 °C.

Outlook for Saturday to Monday:

Scattered thunderstorms in the west will spread north-eastwards during the morning, clearing later. Sunday and Monday will be fresher with sunny spells and perhaps a few showers.

Updated at: 1600 on Thu 25 May 2017

UK forecast for the next 5 days

Hot and sunny on Friday, some thundery showers this weekend.

This Evening and Tonight:

It will be a fine evening with plenty of late, warm sunshine on offer. A dry night will then follow with clear skies across most areas. It will be a mild night for all and rather humid in the south.

Friday:

Friday will be dry, sunny and hot again almost everywhere. It will cloud over in western parts of Northern Ireland later with the possibility of some showery rain too.

Outlook for Saturday to Monday:

Hot and mainly sunny weather breaking down as scattered thunderstorms move east across the country on Saturday. Becoming fresher, although a chance of further thundery rain in the south.

Updated at: 1600 on Thu 25 May 2017

Outlook for the UK over the next 6-30 days

UK Outlook for Tuesday 30 May 2017 to Thursday 8 Jun 2017:

Initially fairly settled with dry conditions and some sunny spells on Tuesday. Then becoming more changeable with bands of cloud and rain pushing in from the west, weakening as they move eastwards. The south and southeast still at risk of further humid conditions and thundery outbreaks. Temperatures remaining rather warm. Remaining unsettled from the end of the week and through the remainder of the period with a northwest-southeast split. The northwest tending to see spells of rain or showers with some drier, brighter interludes. Generally drier and brighter further southeast, but with some humid, thundery spells still possible in the southeast. Becoming windy at times, especially over next weekend. Temperatures generally near normal, or rather cool, in the northwest and warm at times in the south and east.

Updated at: 1250 on Thu 25 May 2017

UK Outlook for Friday 9 Jun 2017 to Friday 23 Jun 2017:

Confidence is currently low through this period, though we are more likely to see changeable conditions continue through the early part of June. More settled weather may begin to dominate for a time towards the middle of the month, bringing drier and brighter weather for many. Temperatures are likely to be close to normal at first, but may become generally warm, perhaps locally very warm for a time during mid June. By the latter part of the month, there is a possibility of more unsettled conditions developing once more, with spells of rain at times, and temperatures returning closer to average.

Updated at: 1248 on Thu 25 May 2017