Picws Du, from Fan Foel

SWC Walk 86 Fan Brycheiniog and Fan Foel (The Black Mountain)

11-Oct-16 • thomasgrabow on Flickr

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Fan Fechan Moraine at bottom of Fan Hir Escarpment

SWC Walk 86 Fan Brycheiniog and Fan Foel (The Black Mountain)

11-Oct-16 • thomasgrabow on Flickr

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Northerly Views from Fan Hir towards Glasfynydd Forest

SWC Walk 86 Fan Brycheiniog and Fan Foel (The Black Mountain)

11-Oct-16 • thomasgrabow on Flickr

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Wild Hill Ponies (on Cefn Disgwylfa) [off-route]

SWC Walk 86 Fan Brycheiniog and Fan Foel (The Black Mountain)

11-Oct-16 • thomasgrabow on Flickr

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Fan Gyhirych in the Evening Sun

SWC Walk 86 Fan Brycheiniog and Fan Foel (The Black Mountain)

12-Oct-16 • thomasgrabow on Flickr

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Fan Gyhirych, from ascent up Allt Fach

SWC Walk 86 Fan Brycheiniog and Fan Foel (The Black Mountain)

11-Oct-16 • thomasgrabow on Flickr

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Fan Hir Ridge in clouds

SWC Walk 86 Fan Brycheiniog and Fan Foel (The Black Mountain)

11-Oct-16 • thomasgrabow on Flickr

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Black Mountain (Fan Brycheiniog and Fan Foel) from Glyntawe walk

A strenous start then easy route finding along a glacial ridge through wild upland scenery to one of the highest peaks in the Brecon Beacons National Park with spectacular views.

Hiking Weather

7 Day Forecast for Brecon Beacons NP

Sunset: 16:03. Dusk: 16:43. Moon: 100% (visible all night)

8 9 10 11 12 13 14 15 16 17 18 19 20
Thu, 12-Dec 47%
Fri, 13-Dec 39% 42% 41% 42% 40% 38% 35% 27% 36% 37% 39% 38% 47%
Sat, 14-Dec 22% 18% 15% 14% 17% 22% 30% 38% 47% 57% 64% 68% 74%
Sun, 15-Dec 35% 30% 32% 40% 49% 57% 65% 68% 64% 50% 40% 38% 39%
Mon, 16-Dec 22% 18% 15% 15% 17% 15% 15% 15% 13% 10% 9% 12% 15%
Tue, 17-Dec 0% 0% 0% 3% 5% 5% 15% 14% 13% 9% 5% 5% 4%
Wed, 18-Dec 34% 28% 30% 39% 48% 50% 48% 42% 37% 34% 35% 36% 40%
Thu, 19-Dec 53% 60% 60% 56% 54% 54% 53% 57% 61% 65% 73% 77% 78%

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Met Office Forecast

Wales

Chilly, cloudy with outbreaks of rain.

This Evening and Tonight:

It will be a cloudy evening with outbreaks of rain. It will become dry for some overnight, however there will be lingering showery rain. It will also be windy, with potential severe gales along the coasts. A patchy frost. Minimum Temperature 1C.

Friday:

Windy with sunny spells and showery rain at first, the rain will become increasingly confined to northern areas into the afternoon. Feeling chilly in the wind. Maximum Temperature 9C.

Outlook for Saturday to Monday:

Remaining unsettled and rather cold through the weekend. It will often be windy with further rain or showers bringing a little snow, mainly on hills. Drier and brighter on Monday.

Day 6-7 and Week 2:

A less windy interlude is likely for many at the start of next week with longer drier, brighter spells but also night frost and patchy fog. However, there may be further rain in the southeast on Tuesday, perhaps extending further north. From mid-week it will turn milder and unsettled again as further bands of rain and strong winds edge in from the west, after which unsettled and sometimes windy conditions will probably last for the rest of the period. Most of the rain will probably be in the west with drier spells more likely in the east and southeast. Snow may occur at times in the north, mainly on high ground. There remains a chance of brief drier, colder interludes, with an increased risk of frost and fog.

Week 3 and 4:

Confidence is low throughout this period. Changeable and sometimes windy conditions seem more likely through late December, with the wetter weather in the west and longer drier spells in the east. By the time we go into January, longer spells of more widely dry, quiet and bright weather are possible, especially for southern and central areas, with the northwest more likely to remain unsettled. Temperatures should be near to or somewhat above average overall, but with the usual day to day variations. However in quieter spells, it is likely to be colder generally, with an increased risk of frost and fog.

Met Office : Wales : 2019-12-12T14:55:02

Daylight : Brecon Beacons NP

Date Dawn Sunrise Sunset Dusk Day Length
Thu, 12-Dec 07:31 08:12 16:03 16:43 9:12
Fri, 13-Dec 07:32 08:13 16:03 16:43 9:11
Sat, 14-Dec 07:33 08:14 16:03 16:43 9:10
Sun, 15-Dec 07:34 08:14 16:03 16:43 9:09
Mon, 16-Dec 07:35 08:15 16:03 16:44 9:09
Tue, 17-Dec 07:35 08:16 16:03 16:44 9:09
Wed, 18-Dec 07:36 08:17 16:03 16:44 9:08
Thu, 19-Dec 07:37 08:18 16:04 16:45 9:08
Fri, 20-Dec 07:37 08:18 16:04 16:45 9:08
Sat, 21-Dec 07:38 08:19 16:05 16:45 9:07
Sun, 22-Dec 07:38 08:19 16:05 16:46 9:08
Mon, 23-Dec 07:39 08:20 16:06 16:46 9:07
Tue, 24-Dec 07:39 08:20 16:06 16:47 9:08
Wed, 25-Dec 07:40 08:20 16:07 16:48 9:08
Thu, 26-Dec 07:40 08:21 16:08 16:48 9:08
Fri, 27-Dec 07:40 08:21 16:08 16:49 9:09
Sat, 28-Dec 07:41 08:21 16:09 16:50 9:09
Sun, 29-Dec 07:41 08:21 16:10 16:51 9:10
Mon, 30-Dec 07:41 08:21 16:11 16:52 9:11
Tue, 31-Dec 07:41 08:21 16:12 16:53 9:12
Wed, 01-Jan 07:41 08:21 16:13 16:54 9:13
Thu, 02-Jan 07:41 08:21 16:14 16:54 9:13
Fri, 03-Jan 07:41 08:21 16:15 16:56 9:15
Sat, 04-Jan 07:41 08:21 16:16 16:57 9:16
Sun, 05-Jan 07:40 08:21 16:18 16:58 9:18
Mon, 06-Jan 07:40 08:20 16:19 16:59 9:19
Tue, 07-Jan 07:40 08:20 16:20 17:00 9:20
Wed, 08-Jan 07:40 08:19 16:21 17:01 9:21
Thu, 09-Jan 07:39 08:19 16:23 17:02 9:23
Fri, 10-Jan 07:39 08:18 16:24 17:04 9:25
Sat, 11-Jan 07:38 08:18 16:26 17:05 9:27
Sun, 12-Jan 07:38 08:17 16:27 17:06 9:28
Mon, 13-Jan 07:37 08:16 16:29 17:08 9:31
Tue, 14-Jan 07:37 08:16 16:30 17:09 9:32
Wed, 15-Jan 07:36 08:15 16:32 17:11 9:35
Thu, 16-Jan 07:35 08:14 16:33 17:12 9:37
Fri, 17-Jan 07:34 08:13 16:35 17:13 9:39
Sat, 18-Jan 07:34 08:12 16:36 17:15 9:41
Sun, 19-Jan 07:33 08:11 16:38 17:16 9:43
Mon, 20-Jan 07:32 08:10 16:40 17:18 9:46
Tue, 21-Jan 07:31 08:09 16:41 17:20 9:49
Wed, 22-Jan 07:30 08:08 16:43 17:21 9:51
Thu, 23-Jan 07:29 08:07 16:45 17:23 9:54
Fri, 24-Jan 07:28 08:05 16:47 17:24 9:56
Sat, 25-Jan 07:27 08:04 16:48 17:26 9:59
Sun, 26-Jan 07:25 08:03 16:50 17:28 10:03
Mon, 27-Jan 07:24 08:01 16:52 17:29 10:05
Tue, 28-Jan 07:23 08:00 16:54 17:31 10:08
Wed, 29-Jan 07:22 07:59 16:56 17:33 10:11
Thu, 30-Jan 07:20 07:57 16:57 17:34 10:14
Fri, 31-Jan 07:19 07:56 16:59 17:36 10:17
Sat, 01-Feb 07:18 07:54 17:01 17:38 10:20
Sun, 02-Feb 07:16 07:53 17:03 17:39 10:23
Mon, 03-Feb 07:15 07:51 17:05 17:41 10:26
Tue, 04-Feb 07:13 07:49 17:07 17:43 10:30
Wed, 05-Feb 07:12 07:48 17:08 17:45 10:33
Thu, 06-Feb 07:10 07:46 17:10 17:46 10:36
Fri, 07-Feb 07:09 07:44 17:12 17:48 10:39
Sat, 08-Feb 07:07 07:43 17:14 17:50 10:43
Sun, 09-Feb 07:05 07:41 17:16 17:51 10:46
Mon, 10-Feb 07:04 07:39 17:18 17:53 10:49
Tue, 11-Feb 07:02 07:37 17:20 17:55 10:53
Wed, 12-Feb 07:00 07:35 17:21 17:57 10:57
Thu, 13-Feb 06:58 07:33 17:23 17:58 11:00
Fri, 14-Feb 06:57 07:32 17:25 18:00 11:03
Sat, 15-Feb 06:55 07:30 17:27 18:02 11:07
Sun, 16-Feb 06:53 07:28 17:29 18:04 11:11
Mon, 17-Feb 06:51 07:26 17:31 18:05 11:14
Tue, 18-Feb 06:49 07:24 17:33 18:07 11:18
Wed, 19-Feb 06:47 07:22 17:34 18:09 11:22
Thu, 20-Feb 06:45 07:20 17:36 18:11 11:26
Fri, 21-Feb 06:43 07:18 17:38 18:12 11:29
Sat, 22-Feb 06:41 07:16 17:40 18:14 11:33
Sun, 23-Feb 06:39 07:13 17:42 18:16 11:37
Mon, 24-Feb 06:37 07:11 17:44 18:18 11:41
Tue, 25-Feb 06:35 07:09 17:45 18:19 11:44
Wed, 26-Feb 06:33 07:07 17:47 18:21 11:48
Thu, 27-Feb 06:31 07:05 17:49 18:23 11:52
Fri, 28-Feb 06:29 07:03 17:51 18:25 11:56
Sat, 29-Feb 06:27 07:01 17:53 18:26 11:59
Sun, 01-Mar 06:25 06:59 17:54 18:28 12:03
Mon, 02-Mar 06:23 06:56 17:56 18:30 12:07
Tue, 03-Mar 06:21 06:54 17:58 18:32 12:11
Wed, 04-Mar 06:18 06:52 18:00 18:33 12:15
Thu, 05-Mar 06:16 06:50 18:01 18:35 12:19
Fri, 06-Mar 06:14 06:48 18:03 18:37 12:23
Sat, 07-Mar 06:12 06:45 18:05 18:39 12:27
Sun, 08-Mar 06:10 06:43 18:07 18:40 12:30
Mon, 09-Mar 06:07 06:41 18:09 18:42 12:35
Tue, 10-Mar 06:05 06:39 18:10 18:44 12:39
Wed, 11-Mar 06:03 06:36 18:12 18:46 12:43
Thu, 12-Mar 06:01 06:34 18:14 18:47 12:46
Fri, 13-Mar 05:58 06:32 18:16 18:49 12:51
Sat, 14-Mar 05:56 06:29 18:17 18:51 12:55
Sun, 15-Mar 05:54 06:27 18:19 18:53 12:59
Mon, 16-Mar 05:51 06:25 18:21 18:54 13:03
Tue, 17-Mar 05:49 06:22 18:22 18:56 13:07
Wed, 18-Mar 05:47 06:20 18:24 18:58 13:11
Thu, 19-Mar 05:44 06:18 18:26 19:00 13:16
Fri, 20-Mar 05:42 06:16 18:28 19:01 13:19
Sat, 21-Mar 05:40 06:13 18:29 19:03 13:23
Sun, 22-Mar 05:37 06:11 18:31 19:05 13:28
Mon, 23-Mar 05:35 06:09 18:33 19:07 13:32
Tue, 24-Mar 05:33 06:06 18:35 19:08 13:35
Wed, 25-Mar 05:30 06:04 18:36 19:10 13:40
Thu, 26-Mar 05:28 06:02 18:38 19:12 13:44
Fri, 27-Mar 05:26 05:59 18:40 19:14 13:48
Sat, 28-Mar 05:23 05:57 18:41 19:15 13:52
Sun, 29-Mar 06:21 06:55 19:43 20:17 13:56
Mon, 30-Mar 06:18 06:53 19:45 20:19 14:01
Tue, 31-Mar 06:16 06:50 19:46 20:21 14:05
Wed, 01-Apr 06:14 06:48 19:48 20:23 14:09
Thu, 02-Apr 06:11 06:46 19:50 20:24 14:13
Fri, 03-Apr 06:09 06:43 19:52 20:26 14:17
Sat, 04-Apr 06:07 06:41 19:53 20:28 14:21
Sun, 05-Apr 06:04 06:39 19:55 20:30 14:26
Mon, 06-Apr 06:02 06:37 19:57 20:32 14:30
Tue, 07-Apr 06:00 06:34 19:58 20:33 14:33
Wed, 08-Apr 05:57 06:32 20:00 20:35 14:38
Thu, 09-Apr 05:55 06:30 20:02 20:37 14:42

Data: US Navy Observatory

Moonlight : Brecon Beacons NP

Date Sunset Dusk Moon Rise Moon Set Dawn Sunrise % Full Max. Ht. Night Walk
Thu, 12-Dec 16:03 16:43 dusk dawn 07:32 08:13 100% 00:52 all night
Fri, 13-Dec 16:03 16:43 17:18 dawn 07:33 08:14 98% 01:49 before dawn
Sat, 14-Dec 16:03 16:43 18:20 dawn 07:34 08:14 94% 02:48 before dawn
Sun, 15-Dec 16:03 16:43 19:33 dawn 07:35 08:15 87% 03:45 before dawn
Mon, 16-Dec 16:03 16:44 20:52 dawn 07:35 08:16 79% 04:40 before dawn
Tue, 17-Dec 16:03 16:44 22:13 dawn 07:36 08:17 69% 05:33
Wed, 18-Dec 16:03 16:44 23:34 dawn 07:37 08:18 58% 06:24
Thu, 19-Dec 16:04 16:45 00:55 dawn 07:37 08:18 50% 07:14
Fri, 20-Dec 16:04 16:45 02:15 dawn 07:38 08:19 36% 08:03
Sat, 21-Dec 16:05 16:45 03:36 dawn 07:38 08:19 25% 08:54
Sun, 22-Dec 16:05 16:46 04:56 dawn 07:39 08:20 16% 09:46
Mon, 23-Dec 16:06 16:46 06:15 dawn 07:39 08:20 9% 10:39
Tue, 24-Dec 16:06 16:47 07:29 dawn 07:40 08:20 3% 11:35
Wed, 25-Dec 16:07 16:48 07:40 08:21 1%
Thu, 26-Dec 16:08 16:48 07:40 08:21 0%
Fri, 27-Dec 16:08 16:49 dusk 17:23 07:41 08:21 2% 13:25
Sat, 28-Dec 16:09 16:50 dusk 18:28 07:41 08:21 6% 14:17
Sun, 29-Dec 16:10 16:51 dusk 19:36 07:41 08:21 11% 15:07
Mon, 30-Dec 16:11 16:52 dusk 20:44 07:41 08:21 18% 15:53
Tue, 31-Dec 16:12 16:53 dusk 21:52 07:41 08:21 26% 16:37
Wed, 01-Jan 16:13 16:54 dusk 22:59 07:41 08:21 34% 17:19
Thu, 02-Jan 16:14 16:54 dusk 00:05 07:41 08:21 44% 18:00
Fri, 03-Jan 16:15 16:56 dusk 01:12 07:41 08:21 50% 18:41
Sat, 04-Jan 16:16 16:57 dusk 02:19 07:40 08:21 62% 19:23
Sun, 05-Jan 16:18 16:58 dusk 03:29 07:40 08:20 72% 20:06
Mon, 06-Jan 16:19 16:59 dusk 04:41 07:40 08:20 80% 20:53 after dusk
Tue, 07-Jan 16:20 17:00 dusk 05:54 07:40 08:19 88% 21:43 after dusk
Wed, 08-Jan 16:21 17:01 dusk 07:03 07:39 08:19 94% 22:37 after dusk
Thu, 09-Jan 16:23 17:02 dusk dawn 07:39 08:18 98% 23:35 all night
Fri, 10-Jan 16:24 17:04 dusk dawn 07:38 08:18 100% 00:34 all night
Sat, 11-Jan 16:26 17:05 17:14 dawn 07:38 08:17 99% 01:34 before dawn
Sun, 12-Jan 16:27 17:06 18:33 dawn 07:37 08:16 96% 02:32 before dawn
Mon, 13-Jan 16:29 17:08 19:57 dawn 07:37 08:16 90% 03:27 before dawn
Tue, 14-Jan 16:30 17:09 21:20 dawn 07:36 08:15 82% 04:20 before dawn
Wed, 15-Jan 16:32 17:11 22:43 dawn 07:35 08:14 73% 05:11
Thu, 16-Jan 16:33 17:12 00:04 dawn 07:34 08:13 62% 06:01
Fri, 17-Jan 16:35 17:13 01:24 dawn 07:34 08:12 50% 06:51
Sat, 18-Jan 16:36 17:15 02:44 dawn 07:33 08:11 39% 07:42
Sun, 19-Jan 16:38 17:16 04:01 dawn 07:32 08:10 29% 08:34
Mon, 20-Jan 16:40 17:18 05:15 dawn 07:31 08:09 20% 09:27
Tue, 21-Jan 16:41 17:20 06:23 dawn 07:30 08:08 12% 10:21
Wed, 22-Jan 16:43 17:21 07:21 dawn 07:29 08:07 6% 11:16
Thu, 23-Jan 16:45 17:23 07:28 08:05 2%
Fri, 24-Jan 16:47 17:24 07:27 08:04 0%
Sat, 25-Jan 16:48 17:26 07:25 08:03 0%
Sun, 26-Jan 16:50 17:28 dusk 18:29 07:24 08:01 3% 13:47
Mon, 27-Jan 16:52 17:29 dusk 19:37 07:23 08:00 7% 14:32
Tue, 28-Jan 16:54 17:31 dusk 20:44 07:22 07:59 12% 15:15
Wed, 29-Jan 16:56 17:33 dusk 21:51 07:20 07:57 19% 15:56
Thu, 30-Jan 16:57 17:34 dusk 22:57 07:19 07:56 27% 16:37
Fri, 31-Jan 16:59 17:36 dusk 00:04 07:18 07:54 35% 17:17
Sat, 01-Feb 17:01 17:38 dusk 01:11 07:16 07:53 45% 17:59
Sun, 02-Feb 17:03 17:39 dusk 02:21 07:15 07:51 50% 18:44
Mon, 03-Feb 17:05 17:41 dusk 03:32 07:13 07:49 64% 19:31
Tue, 04-Feb 17:07 17:43 dusk 04:42 07:12 07:48 73% 20:22
Wed, 05-Feb 17:08 17:45 dusk 05:48 07:10 07:46 82% 21:17 after dusk
Thu, 06-Feb 17:10 17:46 dusk 06:45 07:09 07:44 90% 22:15 after dusk
Fri, 07-Feb 17:12 17:48 dusk dawn 07:07 07:43 95% 23:15 all night
Sat, 08-Feb 17:14 17:50 dusk dawn 07:05 07:41 99% 00:15 all night
Sun, 09-Feb 17:16 17:51 dusk dawn 07:04 07:39 100% 01:14 all night
Mon, 10-Feb 17:18 17:53 18:56 dawn 07:02 07:37 98% 02:09 before dawn
Tue, 11-Feb 17:20 17:55 20:22 dawn 07:00 07:35 93% 03:03 before dawn
Wed, 12-Feb 17:21 17:57 21:47 dawn 06:58 07:33 86% 03:55 before dawn
Thu, 13-Feb 17:23 17:58 23:11 dawn 06:57 07:32 76% 04:47 before dawn
Fri, 14-Feb 17:25 18:00 00:32 dawn 06:55 07:30 66% 05:38
Sat, 15-Feb 17:27 18:02 01:52 dawn 06:53 07:28 50% 06:30
Sun, 16-Feb 17:29 18:04 03:07 dawn 06:51 07:26 44% 07:24
Mon, 17-Feb 17:31 18:05 04:17 dawn 06:49 07:24 33% 08:17
Tue, 18-Feb 17:33 18:07 05:17 dawn 06:47 07:22 24% 09:11
Wed, 19-Feb 17:34 18:09 06:06 dawn 06:45 07:20 16% 10:04
Thu, 20-Feb 17:36 18:11 06:43 07:18 9%
Fri, 21-Feb 17:38 18:12 06:41 07:16 4%
Sat, 22-Feb 17:40 18:14 06:39 07:13 1%
Sun, 23-Feb 17:42 18:16 06:37 07:11 0%
Mon, 24-Feb 17:44 18:18 dusk 18:33 06:35 07:09 1% 13:12
Tue, 25-Feb 17:45 18:19 dusk 19:40 06:33 07:07 3% 13:53
Wed, 26-Feb 17:47 18:21 dusk 20:46 06:31 07:05 7% 14:34
Thu, 27-Feb 17:49 18:23 dusk 21:52 06:29 07:03 13% 15:15
Fri, 28-Feb 17:51 18:25 dusk 22:59 06:27 07:01 20% 15:56
Sat, 29-Feb 17:53 18:26 dusk 00:07 06:25 06:59 28% 16:39
Sun, 01-Mar 17:54 18:28 dusk 01:16 06:23 06:56 37% 17:24
Mon, 02-Mar 17:56 18:30 dusk 02:25 06:21 06:54 50% 18:12
Tue, 03-Mar 17:58 18:32 dusk 03:31 06:18 06:52 57% 19:04
Wed, 04-Mar 18:00 18:33 dusk 04:31 06:16 06:50 67% 19:59
Thu, 05-Mar 18:01 18:35 dusk 05:23 06:14 06:48 77% 20:57 after dusk
Fri, 06-Mar 18:03 18:37 dusk 06:04 06:12 06:45 85% 21:56 after dusk
Sat, 07-Mar 18:05 18:39 dusk dawn 06:10 06:43 93% 22:54 all night
Sun, 08-Mar 18:07 18:40 dusk dawn 06:07 06:41 98% 23:52 all night
Mon, 09-Mar 18:09 18:42 dusk dawn 06:05 06:39 100% 00:47 all night
Tue, 10-Mar 18:10 18:44 19:17 dawn 06:03 06:36 99% 01:42 before dawn
Wed, 11-Mar 18:12 18:46 20:45 dawn 06:01 06:34 95% 02:35 before dawn
Thu, 12-Mar 18:14 18:47 22:11 dawn 05:58 06:32 89% 03:29 before dawn
Fri, 13-Mar 18:16 18:49 23:35 dawn 05:56 06:29 80% 04:23 before dawn
Sat, 14-Mar 18:17 18:51 00:55 dawn 05:54 06:27 70% 05:17
Sun, 15-Mar 18:19 18:53 02:09 dawn 05:51 06:25 60% 06:12
Mon, 16-Mar 18:21 18:54 03:14 dawn 05:49 06:22 50% 07:07
Tue, 17-Mar 18:22 18:56 04:06 dawn 05:47 06:20 39% 08:00
Wed, 18-Mar 18:24 18:58 04:48 dawn 05:44 06:18 29% 08:52
Thu, 19-Mar 18:26 19:00 05:21 dawn 05:42 06:16 21% 09:40
Fri, 20-Mar 18:28 19:01 05:40 06:13 13%
Sat, 21-Mar 18:29 19:03 05:37 06:11 8%
Sun, 22-Mar 18:31 19:05 05:35 06:09 3%
Mon, 23-Mar 18:33 19:07 05:33 06:06 1%
Tue, 24-Mar 18:35 19:08 05:30 06:04 0%
Wed, 25-Mar 18:36 19:10 dusk 19:43 05:28 06:02 1% 13:13
Thu, 26-Mar 18:38 19:12 dusk 20:50 05:26 05:59 4% 13:54
Fri, 27-Mar 18:40 19:14 dusk 21:58 05:23 05:57 9% 14:37
Sat, 28-Mar 18:41 19:15 dusk 00:07 06:21 06:55 15% 15:21
Sun, 29-Mar 19:43 20:17 dusk 01:15 06:18 06:53 22% 17:07
Mon, 30-Mar 19:45 20:19 dusk 02:22 06:16 06:50 30% 17:57
Tue, 31-Mar 19:46 20:21 dusk 03:23 06:14 06:48 40% 18:50
Wed, 01-Apr 19:48 20:23 dusk 04:16 06:11 06:46 50% 19:45
Thu, 02-Apr 19:50 20:24 dusk 05:00 06:09 06:43 61% 20:41
Fri, 03-Apr 19:52 20:26 dusk 05:35 06:07 06:41 72% 21:38
Sat, 04-Apr 19:53 20:28 dusk 06:03 06:04 06:39 81% 22:34 after dusk
Sun, 05-Apr 19:55 20:30 dusk dawn 06:02 06:37 89% 23:30 all night
Mon, 06-Apr 19:57 20:32 dusk dawn 06:00 06:34 96% 00:24 all night
Tue, 07-Apr 19:58 20:33 dusk dawn 05:57 06:32 99% 01:18 all night
Wed, 08-Apr 20:00 20:35 20:38 dawn 05:55 06:30 100% 02:12 before dawn
Thu, 09-Apr 20:02 20:37 22:06 dawn 05:52 06:28 97% 03:08 before dawn

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, and, (ii) if there are hills on the horizon.
  • Of course, you need a cloudless night as well!
  • Data: US Navy Observatory

Met Office Mountain Forecast

Issued: 1800 on 2019-12-12 for Brecon Beacons

Today

Mostly cloudy and rather cold, with showers, these of snow on the tops with blustery winds

Summary Further showers overnight, with snow on the tops. Then some bright spells through the day, but mostly cloudy with showers, these wintry down to 500 or 600m, with temporary blizzard conditions over the tops. The afternoon will likely see fewer showers with some sunshine breaking through, but thicker cloud in the evening, will bring longer spells of rain and hilltop snow.
Chance of Cloud free tops Around 40% with cloud often down to 600m.
Ground conditions
Visibility Mostly good or very good on lower slopes out of showers, but marked reductions with showers and poor or very poor at times at height.
Blizzards: Medium Likelihood
Heavy Snow: Low Likelihood
Gales: Low Likelihood
Severe Chill Effect: Medium Likelihood
060708 091011 121314 151617 181920 212223
Weather Heavy snow Heavy snow Heavy snow Light snow Light snow Cloudy
Rain 60% 70% 60% 40% 40% 30%
Temp (tops) 2 1 1 1 2 2
Wind (tops) 30 31 33 32 30 28
Freezing Level 800m 700m 700m 700m 800m 800m
Day 1

Thicker cloud, rain and snow will clear away overnight then a mostly dry start with some sunshine, but wintry showers spreading east during the morning, with possibly a band of heavy rain and summit snow pushing though mid-morning. Probably more sunshine around in the afternoon but heavy rain and summit snow in the evening with risk of thunder. Still cold with blizzard risk over higher slopes.

Ice 700m rising to 900m in evening
Visibility Good beneath cloud, but poor or very poor in showers
Wind Northwest 25 to 30 gust 40mph, becoming westerly 35 gust 50mph, then becoming southwesterly 40 gust 55mph in afternoon, with higher slopes perhaps seeing 50 gust 65mph for a time in evening
Temp Zero to plus 2 C (at high level)
Day 2

Mostly cloudy with showers or spells of rain, sleet and snow. Snow mainly above 600m. Strong to gale force west or southwest winds over the tops easing in the afternoon. Freezing level around 800m.

Day 3

Heavy rain and summit snow overnight, then a drier and brighter day with only the odd shower and some good spells of sunshine likely in the afternoon Moderate or fresh southwest over the tops turning south or southeasterly. Freezing level around 800m, but lower early in the day.

Day 4

Possibly some heavy rain and summit snow overnight, then rather cloudy with the odd shower, though some bright or perhaps sunny spells. Stronger southeast winds possible overnight, then winds falling light before turning northeast. Freezing level rising above the tops.

Data: Met Office