Pick the dates from geometry.
Moon and darkness timing can be calculated ahead; weather becomes less certain further out. Choose the window now and check the cloud when it gets close. Thirty nights at Blackwood.
19 Sept · Blackwood
Waxing gibbous · 61% lit at local midnight.
Astronomical darkness
19 Sept · 21:20 → 20 Sept · 05:00 (7.7h)
Moon below horizon during darkness
5.3h total.
Longest window for your filters
19 Sept · 23:40 → 20 Sept · 05:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
20 Sept · Blackwood
Waxing gibbous · 70% lit at local midnight.
Astronomical darkness
20 Sept · 21:20 → 21 Sept · 05:20 (8.0h)
Moon below horizon during darkness
4.7h total.
Longest window for your filters
21 Sept · 00:40 → 21 Sept · 05:20 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
21 Sept · Blackwood
Waxing gibbous · 78% lit at local midnight.
Astronomical darkness
21 Sept · 21:20 → 22 Sept · 05:20 (8.0h)
Moon below horizon during darkness
3.3h total.
Longest window for your filters
22 Sept · 02:00 → 22 Sept · 05:20 Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
22 Sept · Blackwood
Waxing gibbous · 85% lit at local midnight.
Astronomical darkness
22 Sept · 21:20 → 23 Sept · 05:20 (8.0h)
Moon below horizon during darkness
2.3h total.
Longest window for your filters
23 Sept · 03:00 → 23 Sept · 05:20 Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
23 Sept · Blackwood
Waxing gibbous · 92% lit at local midnight.
Astronomical darkness
23 Sept · 21:20 → 24 Sept · 05:20 (8.0h)
Moon below horizon during darkness
1.0h total.
Longest window for your filters
24 Sept · 04:20 → 24 Sept · 05:20 Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
24 Sept · Blackwood
Waxing gibbous · 96% lit at local midnight.
Astronomical darkness
24 Sept · 21:20 → 25 Sept · 05:20 (8.0h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
25 Sept · Blackwood
Full moon · 99% lit at local midnight.
Astronomical darkness
25 Sept · 21:00 → 26 Sept · 05:20 (8.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
26 Sept · Blackwood
Full moon · 100% lit at local midnight.
Astronomical darkness
26 Sept · 21:00 → 27 Sept · 05:20 (8.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
27 Sept · Blackwood
Waning gibbous · 98% lit at local midnight.
Astronomical darkness
27 Sept · 21:00 → 28 Sept · 05:20 (8.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
28 Sept · Blackwood
Waning gibbous · 94% lit at local midnight.
Astronomical darkness
28 Sept · 21:00 → 29 Sept · 05:20 (8.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
29 Sept · Blackwood
Waning gibbous · 88% lit at local midnight.
Astronomical darkness
29 Sept · 21:00 → 30 Sept · 05:20 (8.3h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
30 Sept · Blackwood
Waning gibbous · 79% lit at local midnight.
Astronomical darkness
30 Sept · 21:00 → 1 Oct · 05:40 (8.7h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
1 Oct · Blackwood
Waning gibbous · 69% lit at local midnight.
Astronomical darkness
1 Oct · 21:00 → 2 Oct · 05:40 (8.7h)
Moon below horizon during darkness
0.0h total.
Longest window for your filters
None. Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
2 Oct · Blackwood
Last quarter · 57% lit at local midnight.
Astronomical darkness
2 Oct · 21:00 → 3 Oct · 05:40 (8.7h)
Moon below horizon during darkness
0.7h total.
Longest window for your filters
2 Oct · 21:00 → 2 Oct · 21:40 Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
3 Oct · Blackwood
Last quarter · 46% lit at local midnight.
Astronomical darkness
3 Oct · 20:40 → 4 Oct · 05:40 (9.0h)
Moon below horizon during darkness
2.3h total.
Longest window for your filters
3 Oct · 20:40 → 3 Oct · 23:00 Does not meet your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
4 Oct · Blackwood
Waning crescent · 34% lit at local midnight.
Astronomical darkness
4 Oct · 20:40 → 5 Oct · 05:40 (9.0h)
Moon below horizon during darkness
4.0h total.
Longest window for your filters
4 Oct · 20:40 → 5 Oct · 00:40 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
5 Oct · Blackwood
Waning crescent · 24% lit at local midnight.
Astronomical darkness
5 Oct · 20:40 → 6 Oct · 05:40 (9.0h)
Moon below horizon during darkness
5.3h total.
Longest window for your filters
5 Oct · 20:40 → 6 Oct · 02:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
6 Oct · Blackwood
Waning crescent · 15% lit at local midnight.
Astronomical darkness
6 Oct · 20:40 → 7 Oct · 05:40 (9.0h)
Moon below horizon during darkness
6.7h total.
Longest window for your filters
6 Oct · 20:40 → 7 Oct · 03:20 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
7 Oct · Blackwood
Waning crescent · 8% lit at local midnight.
Astronomical darkness
7 Oct · 20:40 → 8 Oct · 05:40 (9.0h)
Moon below horizon during darkness
8.3h total.
Longest window for your filters
7 Oct · 20:40 → 8 Oct · 05:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
8 Oct · Blackwood
Waning crescent · 3% lit at local midnight.
Astronomical darkness
8 Oct · 20:40 → 9 Oct · 05:40 (9.0h)
Moon below horizon during darkness
9.0h total.
Longest window for your filters
8 Oct · 20:40 → 9 Oct · 05:40 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
9 Oct · Blackwood
New moon · 0% lit at local midnight.
Astronomical darkness
9 Oct · 20:40 → 10 Oct · 05:40 (9.0h)
Moon below horizon during darkness
9.0h total.
Longest window for your filters
9 Oct · 20:40 → 10 Oct · 05:40 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
10 Oct · Blackwood
New moon · 0% lit at local midnight.
Astronomical darkness
10 Oct · 20:40 → 11 Oct · 05:40 (9.0h)
Moon below horizon during darkness
9.0h total.
Longest window for your filters
10 Oct · 20:40 → 11 Oct · 05:40 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
11 Oct · Blackwood
Waxing crescent · 2% lit at local midnight.
Astronomical darkness
11 Oct · 20:40 → 12 Oct · 05:40 (9.0h)
Moon below horizon during darkness
9.0h total.
Longest window for your filters
11 Oct · 20:40 → 12 Oct · 05:40 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
12 Oct · Blackwood
Waxing crescent · 6% lit at local midnight.
Astronomical darkness
12 Oct · 20:20 → 13 Oct · 06:00 (9.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
12 Oct · 20:20 → 13 Oct · 06:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
13 Oct · Blackwood
Waxing crescent · 12% lit at local midnight.
Astronomical darkness
13 Oct · 20:20 → 14 Oct · 06:00 (9.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
13 Oct · 20:20 → 14 Oct · 06:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
14 Oct · Blackwood
Waxing crescent · 18% lit at local midnight.
Astronomical darkness
14 Oct · 20:20 → 15 Oct · 06:00 (9.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
14 Oct · 20:20 → 15 Oct · 06:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
15 Oct · Blackwood
Waxing crescent · 26% lit at local midnight.
Astronomical darkness
15 Oct · 20:20 → 16 Oct · 06:00 (9.7h)
Moon below horizon during darkness
9.7h total.
Longest window for your filters
15 Oct · 20:20 → 16 Oct · 06:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
16 Oct · Blackwood
Waxing crescent · 35% lit at local midnight.
Astronomical darkness
16 Oct · 20:20 → 17 Oct · 06:00 (9.7h)
Moon below horizon during darkness
8.7h total.
Longest window for your filters
16 Oct · 21:20 → 17 Oct · 06:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
17 Oct · Blackwood
First quarter · 44% lit at local midnight.
Astronomical darkness
17 Oct · 20:20 → 18 Oct · 06:00 (9.7h)
Moon below horizon during darkness
7.7h total.
Longest window for your filters
17 Oct · 22:20 → 18 Oct · 06:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
18 Oct · Blackwood
First quarter · 53% lit at local midnight.
Astronomical darkness
18 Oct · 20:20 → 19 Oct · 06:00 (9.7h)
Moon below horizon during darkness
6.3h total.
Longest window for your filters
18 Oct · 23:40 → 19 Oct · 06:00 Meets your minimum duration.
Times in Europe/London · approximately 20-minute samples. Geometry only, not a weather forecast.
2 nights in a row meeting 4 h with the moon below the horizon. 17 qualify across the 30.
The usable moonless stretch collapses to nothing around it. A good week for planets, doubles and lunar detail.
The moon moves about 12° east a day, so the dark window shifts roughly fifty minutes later each night. A Friday plan is not a Saturday plan.
Plan somewhere else
Sky geometry only — no weather claims beyond the seven-night forecast. How to plan around the moon →