Next Full Moon Countdown

This tool searches forward from the current moment for the exact date and time of the next full moon, then counts down to it live in your browser — the same underlying search function (SearchMoonPhase, from the astronomy-engine library) that powers every full-moon date shown across this site's calendar and full-moon pages, run client-side against your device's current time.

The countdown targets the precise astronomical instant of the next full moon — the exact moment the Moon's phase angle reaches 180 degrees (directly opposite the Sun as seen from Earth) — not a rounded-to-the-day approximation, so the timer reflects real hours and minutes remaining, not just a date.

Because the countdown is computed from your own device's clock and timezone, the exact hours/minutes/seconds shown will match your local time automatically, while the underlying astronomical instant itself is the same single moment worldwide (this site's full-moon pages also show the UTC time for reference, useful if you want to compare against another timezone).

Once the countdown reaches the exact full-moon instant, the tool will show that month's full moon has arrived — check this site's full-moon section for that month's specific traditional name, folklore, and zodiac sign, since every month's full moon carries its own individually researched detail rather than a generic notification.

This is a genuinely different question from "when is the next full moon" answered by a calendar lookup — a countdown format is useful specifically when you're planning something timed to the moment itself (a photography session, a ritual, or simply curiosity about how many hours remain), rather than just wanting to know which calendar day it falls on.

Below is a static snapshot of the next full moon's date, computed the same way the live countdown will run once you're viewing this page with JavaScript active — the number itself updates in real time in your browser, but the underlying search (SearchMoonPhase against the current time) is identical either way.

The underlying search function doesn't assume a fixed 29.53-day average between full moons — it directly searches forward from your current moment for the next instant the Moon's phase angle crosses 180 degrees, meaning the countdown is accurate even during months where the gap to the next full moon is slightly longer or shorter than the average synodic month, exactly as the Moon's genuinely variable orbital speed produces.

If you're specifically trying to plan around a Blue Moon (the second full moon within a calendar month), this tool's live search will surface it the same way it surfaces any other full moon — check this site's full-moon calendar for advance notice of which months in the current window carry one.

Like every tool on this site, this one is free, ad-supported, and requires no account or download — just open the page and the countdown runs immediately.