Moon Phases — September 2025
Full Moon on September 7 at 19:53 UTC, New Moon on September 21 at 17:25 UTC. Each cell shows that day's phase and illumination.
September 2025 · phase for each day (UTC)
Best Nights in September
✦Darkest skies
Sep 19 – Sep 23
Around the New Moon (Sep 21), little moonlight — the best nights for the Milky Way, meteors and faint deep-sky objects.
◐Sharpest Moon detail
Sep 14 · Sep 29
At the quarter Moons the terminator throws long shadows across crater rims — the best nights to photograph lunar surface detail.
○Brightest nights
Sep 6 – Sep 8
Around the Harvest Moon (Sep 7), strong natural moonlight for night walks — but it washes out fainter stars.
Moonrise & moonset where you are
See tonight's moonrise, moonset and best viewing time for your location — then plan the rest of the month from the grid above.