SkyAlmanac

Moon · September 2025

Moon calendar for Ottawa, Ontario, Canada: September 2025

Daily moon phases, illumination, moonrise and moonset in Ottawa, Ontario, Canada for September 2025. Full moon: September 7, 2025. All times are shown in the local time of Ottawa, Ontario, Canada.

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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% 3:50 PM —
2 Waxing Gibbous 73% 4:31 PM 12:30 AM
3 Waxing Gibbous 81% 5:31 PM 1:40 AM
4 Waxing Gibbous 89% 5:53 PM 2:54 AM
5 Waxing Gibbous 94% 6:22 PM 4:00 AM
6 Waxing Gibbous 98% 6:34 PM 5:26 AM
7 Full Moon 100% 7:16 PM 6:24 AM
8 Full Moon 99% 7:34 PM 7:41 AM
9 Waning Gibbous 96% 7:42 PM 9:10 AM
10 Waning Gibbous 89% 8:12 PM 10:22 AM
11 Waning Gibbous 81% 8:25 PM 11:46 AM
12 Waning Gibbous 71% 9:10 PM 1:27 PM
13 Last Quarter 60% 9:46 PM 2:32 PM
14 Last Quarter 48% 10:35 PM 3:51 PM
15 Waning Crescent 37% 11:56 PM 4:44 PM
16 Waning Crescent 26% — 5:38 PM
17 Waning Crescent 17% 1:25 AM 6:08 PM
18 Waning Crescent 10% 2:27 AM 6:24 PM
19 Waning Crescent 4% 3:51 AM 6:38 PM
20 Waning Crescent 1% 5:18 AM 7:11 PM
21 New Moon 0% 6:20 AM 7:30 PM
22 New Moon 1% 7:32 AM 7:36 PM
23 Waxing Crescent 4% 8:24 AM 7:46 PM
24 Waxing Crescent 8% 9:37 AM 8:15 PM
25 Waxing Crescent 14% 10:29 AM 8:27 PM
26 Waxing Crescent 21% 11:42 AM 9:12 PM
27 Waxing Crescent 29% 12:35 PM 9:42 PM
28 Waxing Crescent 38% 1:43 PM 10:25 PM
29 First Quarter 48% 2:27 PM 11:34 PM
30 First Quarter 58% 3:29 PM —

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Frequently asked questions

When is the full moon in September 2025 in Ottawa, Ontario, Canada?

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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