Moon · September 2025
Moon calendar for Boston, Massachusetts, United States: September 2025
Daily moon phases, illumination, moonrise and moonset in Boston, Massachusetts, United States for September 2025. Full moon: September 7, 2025. All times are shown in the local time of Boston, Massachusetts, United States.
Full moonSunday, September 7, 2025, 3:53 PM
New moonSunday, September 21, 2025, 12:49 PM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waxing Gibbous | 64% | 3:30 PM | — |
| 2 | Waxing Gibbous | 73% | 4:13 PM | 12:26 AM |
| 3 | Waxing Gibbous | 81% | 4:43 PM | 1:36 AM |
| 4 | Waxing Gibbous | 89% | 5:34 PM | 2:29 AM |
| 5 | Waxing Gibbous | 94% | 5:56 PM | 3:47 AM |
| 6 | Waxing Gibbous | 98% | 6:23 PM | 5:01 AM |
| 7 | Full Moon | 100% | 6:34 PM | 6:16 AM |
| 8 | Full Moon | 99% | 7:19 PM | 7:33 AM |
| 9 | Waning Gibbous | 96% | 7:36 PM | 8:29 AM |
| 10 | Waning Gibbous | 89% | 7:53 PM | 9:57 AM |
| 11 | Waning Gibbous | 81% | 8:22 PM | 11:30 AM |
| 12 | Waning Gibbous | 71% | 9:01 PM | 12:32 PM |
| 13 | Last Quarter | 60% | 9:44 PM | 2:04 PM |
| 14 | Last Quarter | 48% | 10:34 PM | 3:26 PM |
| 15 | Waning Crescent | 37% | 11:53 PM | 4:16 PM |
| 16 | Waning Crescent | 26% | — | 5:01 PM |
| 17 | Waning Crescent | 17% | 1:23 AM | 5:37 PM |
| 18 | Waning Crescent | 10% | 2:24 AM | 6:02 PM |
| 19 | Waning Crescent | 4% | 3:41 AM | 6:21 PM |
| 20 | Waning Crescent | 1% | 4:43 AM | 6:30 PM |
| 21 | New Moon | 0% | 5:58 AM | 7:02 PM |
| 22 | New Moon | 1% | 7:08 AM | 7:29 PM |
| 23 | Waxing Crescent | 4% | 8:11 AM | 7:37 PM |
| 24 | Waxing Crescent | 8% | 9:18 AM | 8:00 PM |
| 25 | Waxing Crescent | 14% | 10:14 AM | 8:22 PM |
| 26 | Waxing Crescent | 21% | 11:24 AM | 8:55 PM |
| 27 | Waxing Crescent | 29% | 12:17 PM | 9:38 PM |
| 28 | Waxing Crescent | 38% | 1:20 PM | 10:22 PM |
| 29 | First Quarter | 48% | 2:07 PM | 11:31 PM |
| 30 | First Quarter | 58% | 2:38 PM | — |
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Frequently asked questions
When is the full moon in September 2025 in Boston, Massachusetts, United States?
The full moon peaks on Sunday, September 7, 2025, 3:53 PM (local time).
When is the new moon in September 2025?
The new moon falls on Sunday, September 21, 2025, 12:49 PM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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