Moon · October 2026
Moon calendar for San Mateo, California, United States: October 2026
Daily moon phases, illumination, moonrise and moonset in San Mateo, California, United States for October 2026. Full moon: October 26, 2026. All times are shown in the local time of San Mateo, California, United States.
Full moonMonday, October 26, 2026, 1:58 AM
New moonSaturday, October 10, 2026, 5:45 AM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waning Gibbous | 71% | 9:41 PM | 1:27 PM |
| 2 | Last Quarter | 59% | 10:38 PM | 2:21 PM |
| 3 | Last Quarter | 48% | — | 3:29 PM |
| 4 | Waning Crescent | 36% | 12:06 AM | 4:05 PM |
| 5 | Waning Crescent | 25% | 1:30 AM | 4:29 PM |
| 6 | Waning Crescent | 16% | 2:27 AM | 5:23 PM |
| 7 | Waning Crescent | 9% | 3:44 AM | 5:35 PM |
| 8 | Waning Crescent | 3% | 4:52 AM | 6:05 PM |
| 9 | New Moon | 1% | 6:08 AM | 6:23 PM |
| 10 | New Moon | 0% | 7:26 AM | 6:41 PM |
| 11 | Waxing Crescent | 2% | 8:16 AM | 7:30 PM |
| 12 | Waxing Crescent | 5% | 9:26 AM | 7:46 PM |
| 13 | Waxing Crescent | 11% | 10:19 AM | 8:24 PM |
| 14 | Waxing Crescent | 17% | 11:26 AM | 9:24 PM |
| 15 | Waxing Crescent | 25% | 12:14 PM | 10:03 PM |
| 16 | Waxing Crescent | 33% | 12:58 PM | 10:50 PM |
| 17 | First Quarter | 42% | 1:40 PM | 11:49 PM |
| 18 | First Quarter | 52% | 2:21 PM | — |
| 19 | Waxing Gibbous | 61% | 2:39 PM | 12:46 AM |
| 20 | Waxing Gibbous | 70% | 3:30 PM | 1:50 AM |
| 21 | Waxing Gibbous | 79% | 3:41 PM | 2:52 AM |
| 22 | Waxing Gibbous | 87% | 4:17 PM | 3:57 AM |
| 23 | Waxing Gibbous | 93% | 4:27 PM | 5:06 AM |
| 24 | Waxing Gibbous | 97% | 4:55 PM | 6:11 AM |
| 25 | Full Moon | 100% | 5:34 PM | 7:28 AM |
| 26 | Full Moon | 99% | 6:00 PM | 8:23 AM |
| 27 | Waning Gibbous | 97% | 6:29 PM | 9:40 AM |
| 28 | Waning Gibbous | 91% | 7:35 PM | 10:54 AM |
| 29 | Waning Gibbous | 84% | 8:25 PM | 12:10 PM |
| 30 | Waning Gibbous | 74% | 9:42 PM | 1:17 PM |
| 31 | Waning Gibbous | 63% | 11:02 PM | 1:54 PM |
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Frequently asked questions
When is the full moon in October 2026 in San Mateo, California, United States?
The full moon peaks on Monday, October 26, 2026, 1:58 AM (local time).
When is the new moon in October 2026?
The new moon falls on Saturday, October 10, 2026, 5:45 AM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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