Almanac · The Moon
Full Moons May 2026: the Flower Moon and the Blue Moon
May 2026 has two full Moons: the second is the month’s Blue Moon. The next full Moon is the Beaver Moon, November 2026.
The Flower Moon
- Full
- Name Flower Moon The name North American almanacs give this month’s
- Supermoon No Nearer than 360,000 km at full
How much of the night it is up, 1–2 May
| Latitude | Moonrise and moonset | Up for | Share of the night |
|---|---|---|---|
| 60°N | Rises 20:35, sets 03:19 | 6.7 h of the 8 h night | 85% |
| 45°N | Rises 19:20, sets 04:38 | 9.3 h of the 9.7 h night | 96% |
| 30°N | Rises 18:41, up until sunrise | 10.6 h of the 10.7 h night | 99% |
| 15°N | Up from sunset to sunrise | 11.3 h of the 11.3 h night | 100% |
| 0° | Up from sunset to sunrise | 11.9 h of the 11.9 h night | 100% |
| 15°S | Up from sunset to sunrise | 12.4 h of the 12.4 h night | 100% |
| 30°S | Up from sunset to sunrise | 13.1 h of the 13.1 h night | 100% |
| 45°S | Up from sunset to sunrise | 13.9 h of the 13.9 h night | 100% |
The Blue Moon
- Full
- Name Blue Moon The second full Moon in a calendar month
- Supermoon No Nearer than 360,000 km at full
How much of the night it is up, 30–31 May
| Latitude | Moonrise and moonset | Up for | Share of the night |
|---|---|---|---|
| 60°N | Rises 21:21, sets 01:43 | 4.4 h of the 5.8 h night | 75% |
| 45°N | Up at sunset, sets 03:44 | 8.1 h of the 8.7 h night | 94% |
| 30°N | Up at sunset, sets 04:38 | 9.7 h of the 10.1 h night | 97% |
| 15°N | Up at sunset, sets 05:16 | 10.8 h of the 11.1 h night | 98% |
| 0° | Up at sunset, sets 05:48 | 11.8 h of the 11.9 h night | 99% |
| 15°S | Up from sunset to sunrise | 12.7 h of the 12.7 h night | 100% |
| 30°S | Up from sunset to sunrise | 13.6 h of the 13.6 h night | 100% |
| 45°S | Up from sunset to sunrise | 15 h of the 15 h night | 100% |
How we worked it out: full Moon is the instant the Moon’s ecliptic longitude stands 180° from the Sun’s, from Meeus’s lunar theory, the one the map draws the Moon by, checked against the U.S. Naval Observatory’s times and JPL Horizons. Names are the North American almanacs’, with the Harvest Moon the full Moon nearest the September equinox and a Blue Moon the second in a calendar month, both in UTC: a full Moon early on the 1st can fall in the month before west of Greenwich. A supermoon is a full Moon nearer than 360,000 km. Each latitude’s night runs from sunset to sunrise at Greenwich’s longitude, the night /tonight would draw there, so its times are local solar time, give or take the hour or two a time zone is off the Sun. The method and its measured error.