Use my current location crosshair

Llyn Y Fan Fawr

Llyn Y Fan Fawr last 24 hours
  • 14°C 9°C
    Fog
  • 14°C 10°C
    Light rain
  • 11°C 6°C
    Cloudy
  • 9°C 6°C
    Cloudy
  • 8°C 3°C
    Thunder shower day
  • 9°C 6°C
    Cloudy
  • 12°C 7°C
    Cloudy
Tuesday   (27 September 2016)
0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
Fog Fog Fog Light rain Light rain Fog Fog Cloudy Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night Mist Mist Fog
Temperature (°C)
12 13 13 13 14 14 13 13 12 11 10 10 9 9 9
Feels like temperature (°C) arrow down
9 9 9 10 11 11 10 10 9 8 8 7 6 5 5
Precipitation probability arrow down
30% 30% 30% 60% 60% 20% 20% 10% <5% <5% <5% <5% 10% 10% 20%
Wind direction, speed & gust (mph) arrow down
SSW 19 28 SSW 22 27 SW 21 26 SW 19 24 WSW 17 22 WSW 17 22 W 16 22 W 16 22 W 15 20 W 15 18 WSW 15 18 WSW 17 21 WSW 18 23 WSW 19 24 WSW 20 25
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VP VP VP VP VP VP VP M VG VG VG G P P VP
Humidity arrow down
100% 100% 100% 100% 100% 99% 98% 94% 90% 93% 94% 96% 95% 97% 99%
UV index arrow down
1 1 1 1 2 2 1 1 1 1 0 0 0 0 0
Wednesday   (28 September 2016)
0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
Fog Fog Fog Fog Fog Fog Fog Fog Mist Cloudy Mist Mist Cloudy Cloudy Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain
Temperature (°C)
9 9 9 9 9 9 10 10 10 11 11 12 12 13 13 13 13 13 13 13 13 13 13 13
Feels like temperature (°C) arrow down
5 5 5 5 5 5 6 6 6 7 8 8 8 9 9 9 9 9 9 9 8 8 8 8
Precipitation probability arrow down
20% 20% 20% 20% 20% 20% 20% 20% 20% 10% 20% 20% 20% 20% 50% 50% 50% 50% 50% 50% 50% 60% 60% 60%
Wind direction, speed & gust (mph) arrow down
WSW 21 27 WSW 22 28 WSW 23 29 WSW 23 29 WSW 23 30 WSW 23 29 WSW 22 28 WSW 21 27 WSW 21 28 WSW 22 29 SW 22 30 WSW 22 30 SW 23 31 SW 24 33 SW 24 33 SW 26 35 SW 26 36 SW 27 37 SW 28 38 SW 29 40 SW 29 41 SW 30 43 SW 30 43 SW 31 43
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VP VP VP VP VP VP VP VP P M P P M M VP VP VP VP VP VP VP VP VP VP
Humidity arrow down
99% 99% 99% 99% 98% 98% 97% 98% 96% 96% 96% 96% 96% 95% 97% 97% 98% 98% 99% 99% 99% 99% 99% 99%
UV index arrow down
0 0 0 0 0 0 0 0 1 1 1 1 1 2 1 1 1 1 1 0 0 0 0 0
Thursday   (29 September 2016)
0000 0100 0400 0700 1000 1300 1600 1900 2200
Light rain Light rain Heavy rain Heavy rain Fog Sunny intervals Sunny intervals Cloudy Cloudy
Temperature (°C)
13 13 12 10 10 11 10 9 8
Feels like temperature (°C) arrow down
8 8 8 6 6 7 7 5 4
Precipitation probability arrow down
60% 60% 90% 80% 20% 10% 10% 10% 20%
Wind direction, speed & gust (mph) arrow down
SW 31 44 SW 31 43 WSW 28 39 WSW 24 33 WSW 22 32 WSW 23 37 WSW 23 36 WSW 22 32 WSW 22 31
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VP VP VP P VP G VG VG VG
Humidity arrow down
98% 98% 98% 97% 94% 85% 81% 88% 92%
UV index arrow down
0 0 0 0 1 2 1 0 0
Friday   (30 September 2016)
0100 0400 0700 1000 1300 1600 1900 2200
Heavy rain Light shower night Light shower night Drizzle Sunny intervals Sunny intervals Light shower night Light shower night
Temperature (°C)
8 7 6 8 9 8 7 7
Feels like temperature (°C) arrow down
3 2 2 4 5 5 3 2
Precipitation probability arrow down
80% 30% 30% 30% 20% 10% 40% 30%
Wind direction, speed & gust (mph) arrow down
WSW 20 28 WSW 22 29 WSW 20 27 WSW 18 27 WSW 17 28 W 17 29 WSW 18 24 SW 18 24
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG VG VG M VG VG VG VG
Humidity arrow down
91% 94% 92% 88% 80% 78% 87% 91%
UV index arrow down
0 0 0 2 3 1 0 0
Saturday   (01 October 2016)
0100 0400 0700 1000 1300 1600 1900 2200
Partly cloudy night Cloudy Thunder shower night Drizzle Thunder shower day Thunder shower day Clear night Clear night
Temperature (°C)
6 6 6 7 7 8 7 6
Feels like temperature (°C) arrow down
2 2 2 3 3 4 3 1
Precipitation probability arrow down
10% 10% 50% 30% 70% 60% 10% 10%
Wind direction, speed & gust (mph) arrow down
SW 18 24 SW 17 24 SW 16 23 SW 18 27 WSW 19 30 W 18 28 W 16 22 WSW 16 21
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG VG G P VG VG VG VG
Humidity arrow down
93% 94% 95% 93% 89% 83% 86% 91%
UV index arrow down
0 0 0 1 2 1 0 0
Sunday   (02 October 2016)
0100 0400 0700 1000 1300 1600 1900 2200
Clear night Clear night Partly cloudy night Sunny day Cloudy Cloudy Cloudy Cloudy
Temperature (°C)
5 4 3 7 9 9 8 7
Feels like temperature (°C) arrow down
1 0 0 4 7 7 5 3
Precipitation probability arrow down
10% <5% <5% <5% 10% 10% 10% 10%
Wind direction, speed & gust (mph) arrow down
SW 13 17 SW 11 15 SSW 10 12 S 9 15 SSW 9 18 SSW 9 18 SSE 11 15 SSE 13 20
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
VG G G G VG VG VG VG
Humidity arrow down
91% 95% 97% 89% 73% 73% 87% 89%
UV index arrow down
0 0 0 2 3 1 0 0
Monday   (03 October 2016)
0100 0400 0700 1000 1300 1600 1900 2200
Cloudy Cloudy Cloudy Cloudy Cloudy Sunny day Partly cloudy night Cloudy
Temperature (°C)
6 6 7 8 11 11 10 9
Feels like temperature (°C) arrow down
3 2 2 4 7 8 6 6
Precipitation probability arrow down
10% 10% 10% 10% 10% 10% 10% 10%
Wind direction, speed & gust (mph) arrow down
SSE 15 22 SE 17 24 SE 17 25 SSE 18 28 SSE 17 30 S 18 32 SSE 20 32 SSE 19 31
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) arrow down
G G G G VG VG VG G
Humidity arrow down
90% 90% 91% 88% 79% 76% 83% 88%
UV index arrow down
0 0 0 1 2 1 0 0
More Detail chevron down

Issued at: 0900 on Tue 27 Sep 2016

Forecast summary

Regional forecast for Wales

Some brightness today but further rain expected.

Today:

It'll be a grey and damp start to the day for most with patchy light rain and drizzle. Brighter conditions will move in from the northwest through the afternoon with some sunshine and it will feel pleasant outside. Maximum Temperature 19 °C.

Tonight:

Tonight will be dry with some clear spells developing. The westerly wind will be strong along the coast and we'll see the cloud thicken in the west towards dawn. Minimum Temperature 11 °C.

Wednesday:

Wednesday will start off dry and bright for most. Outbreaks of rain will move into the north and west though with strong winds and coastal gales are likely later. Maximum Temperature 18 °C.

Outlook for Thursday to Saturday:

Thursday will be mostly bright with some showers however outbreaks of rain may affect the south. Friday and Saturday will then see some sunny spells and blustery showers.

Updated at: 0443 on Tue 27 Sep 2016

UK forecast for the next 5 days

Some brightness today but further rain expected.

Today:

It'll be a grey and damp start to the day for most with patchy light rain and drizzle. Brighter conditions will move in from the northwest through the day with some sunshine but it'll be windy in the north.

Tonight:

It will stay windy in the north tonight with showers here. It'll be a dry night for most with clear spells but rain will move into Northern Ireland later.

Wednesday:

Wednesday will start dry and bright for most. Rain, heavy at times, and strong winds will affect northern and western parts especially. It will feel very warm in the southeast.

Outlook for Thursday to Saturday:

Cloud and outbreaks of rain will slowly clear the south on Thursday with blustery showers elsewhere. Friday and Saturday will have sunshine and blustery showers, with thunder likely in northwest.

Updated at: 0414 on Tue 27 Sep 2016

Outlook for the UK over the next 6-30 days

UK Outlook for Saturday 1 Oct 2016 to Monday 10 Oct 2016:

The weekend will be breezy, with a risk of gales at times in the north and west. Showers or longer spells of rain are likely, which will be most persistent in northern and western parts, with the best of any bright spells in the southeast. Changeable conditions are expected to continue through the rest of the period with mainly west or southwesterly winds dominating. This will bring showers or longer spells of rain, interspersed by some brighter periods. The most persistent rain occurring in the northwest, where there is also the risk of occasional gales. Some good brighter spells are possible in the southeast. Temperatures a little below average at first, but then rising to near or above average in the south, and perhaps also at times further north.

Updated at: 1205 on Mon 26 Sep 2016

UK Outlook for Tuesday 11 Oct 2016 to Tuesday 25 Oct 2016:

There is currently low confidence for the forecast during the second half of October. However, the most likely scenario is for a continuation of mainly west or southwesterly winds. This will bring changeable weather with showers or longer spells of rain, interspersed with some dry and bright periods. The north and west is likely to see the heaviest and most persistent rain, with also strong winds or gales at times. The south and east is likely to see the best of the dry and bright conditions, with the possibility of some more prolonged settled spells. Temperatures will vary through the period, but probably averaging out slight above average for the time of year, with an increasing risk of overnight frost in the more settled spells.

Updated at: 1205 on Mon 26 Sep 2016