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UK moon calendar
Moon phases in September 2027
September 2027 has 4 principal moon phases, with the new moon on 30 September 2027 and the full Harvest Moon on 16 September 2027. Below are exact UK times, a day-by-day table and the best nights for dark skies.
Moon phases in September 2027 (UK times)
Times are calculated with astronomy-engine and shown in UK clock time (GMT or BST). They are accurate to about a minute.
| Phase | Date | Time |
|---|---|---|
| First quarter | 7 September 2027 | 19:31 BST |
| Full moon | 16 September 2027 | 00:04 BST |
| Last quarter | 23 September 2027 | 11:21 BST |
| New moon | 30 September 2027 | 03:36 BST |
The full moon in September 2027
The Harvest Moon is full on 16 September 2027 at 00:04 BST, rising over London at about 18:46.
Read the story behind the name on our full moon names pages.
Best nights for dark skies
The darkest skies this month fall around the new moon, roughly 27 September to 3 October. That is the time for meteor watching, the Milky Way and faint galaxies. In folk practice the new moon is also the traditional time to set intentions.
Day-by-day moon calendar for September 2027
Phase and illumination at midday; moonrise and moonset for London (other UK places differ by up to about an hour; see your town in our local guides).
| Date | Phase | Lit | Moonrise | Moonset |
|---|---|---|---|---|
| 1 Wed | Waxing crescent | 1% | 07:09 | 19:44 |
| 2 Thu | Waxing crescent | 5% | 08:37 | 19:59 |
| 3 Fri | Waxing crescent | 11% | 10:03 | 20:15 |
| 4 Sat | Waxing crescent | 19% | 11:27 | 20:34 |
| 5 Sun | Waxing crescent | 28% | 12:50 | 20:58 |
| 6 Mon | Waxing crescent | 37% | 14:07 | 21:30 |
| 7 Tue | First quarter | 47% | 15:15 | 22:12 |
| 8 Wed | Waxing gibbous | 57% | 16:11 | 23:05 |
| 9 Thu | Waxing gibbous | 67% | 16:54 | 00:07 |
| 10 Fri | Waxing gibbous | 75% | 17:25 | – |
| 11 Sat | Waxing gibbous | 83% | 17:49 | 01:16 |
| 12 Sun | Waxing gibbous | 89% | 18:07 | 02:27 |
| 13 Mon | Waxing gibbous | 94% | 18:21 | 03:39 |
| 14 Tue | Waxing gibbous | 98% | 18:34 | 04:50 |
| 15 Wed | Full moon | 100% | 18:46 | 06:00 |
| 16 Thu | Waning gibbous | 100% | 18:58 | 07:11 |
| 17 Fri | Waning gibbous | 98% | 19:11 | 08:23 |
| 18 Sat | Waning gibbous | 93% | 19:26 | 09:38 |
| 19 Sun | Waning gibbous | 88% | 19:46 | 10:55 |
| 20 Mon | Waning gibbous | 80% | 20:12 | 12:14 |
| 21 Tue | Waning gibbous | 71% | 20:49 | 13:31 |
| 22 Wed | Waning gibbous | 60% | 21:41 | 14:41 |
| 23 Thu | Last quarter | 49% | 22:50 | 15:37 |
| 24 Fri | Waning crescent | 38% | 00:11 | 16:20 |
| 25 Sat | Waning crescent | 27% | – | 16:51 |
| 26 Sun | Waning crescent | 17% | 01:39 | 17:14 |
| 27 Mon | Waning crescent | 9% | 03:09 | 17:32 |
| 28 Tue | Waning crescent | 4% | 04:38 | 17:48 |
| 29 Wed | Waning crescent | 1% | 06:05 | 18:03 |
| 30 Thu | New moon | 0% | 07:31 | 18:19 |
Closest and farthest moon
- Apogee (farthest): 12 September 2027, 405,371 km
- Perigee (closest): 27 September 2027, 363,441 km
Festivals on the Wheel of the Year
See our Wheel of the Year guide for traditions and ideas.
- Mabon, the autumn equinox: 23 September 2027, 07:01 BST
Using the moon this month
Many people keep a simple rhythm: write an intention at the new moon, check in at the first quarter, give thanks at the full moon and clear out at the last quarter. Our moon rituals guide has ideas.
Moon pieces from the shop
Questions answered
When is the full moon in September 2027?
16 September 2027 at 00:04 BST UK time. It is traditionally called the Harvest Moon.
When is the new moon in September 2027?
30 September 2027 at 03:36 BST UK time.
What is the best night for stargazing in September 2027?
Around the new moon on 30 September, when the sky is darkest. Pick a clear night and get away from streetlights.
What does the first quarter moon on 7 September 2027 mean?
The first quarter moon on 7 September 2027 (19:31 BST) is half lit and growing, which tradition reads as a time to act on the intentions set at the new moon. It is a good night to review your list, take one practical step and notice what is resisting.
What does the last quarter moon on 23 September 2027 mean?
The last quarter moon on 23 September 2027 (11:21 BST) is half lit and shrinking, which tradition reads as a time to clear out, finish tasks and let go before the next new moon. A decluttering session or a smoke-cleansing of your space are popular ways to mark it.
What should I do on the new moon on 30 September 2027?
On the new moon on 30 September 2027 (03:36 BST), tradition suggests setting intentions: write down two or three things you want to grow this cycle and keep the note somewhere you'll see it. New moons are seen as a quiet, fresh start, good for planning rather than big action.
Key facts (summary)
- September 2027 has 4 principal moon phases, with the new moon on 30 September 2027 and the full Harvest Moon on 16 September 2027.
- 16 September 2027 at 00:04 BST UK time.
- 30 September 2027 at 03:36 BST UK time.
- Around the new moon on 30 September, when the sky is darkest.
- The first quarter moon on 7 September 2027 (19:31 BST) is half lit and growing, which tradition reads as a time to act on the intentions set at the new moon.
- The last quarter moon on 23 September 2027 (11:21 BST) is half lit and shrinking, which tradition reads as a time to clear out, finish tasks and let go before the next new moon.
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