Moon phases in August 2031
All 31 days, computed from the ephemeris rather than copied from another calendar: the Moon’s sign, the exact instant it changes sign, and the lit fraction of the disc. Shown in your own timezone.
- Sturgeon MoonAugust 310.6° Aquarius
- New MoonAugust 1825.1° Leo
Day by day
The four quarter instants are marked on the day they fall; every other day carries the interval it is in. Four of the eight phases are moments and four are stretches, which is the one thing most calendars leave out.
| Date | Phase | Sign | Illumination | Notes | |
|---|---|---|---|---|---|
| Fri 1 | Waxing Gibbous | Capricorn | 96% | ||
| Sat 2 | Waxing Gibbous | Capricorn→Aquarius | 99% | ||
| Sun 3 | Full Moon | Aquarius | 100% | ||
| Mon 4 | Waning Gibbous | Aquarius→Pisces | 97% | ||
| Tue 5 | Waning Gibbous | Pisces | 92% | ||
| Wed 6 | Waning Gibbous | Pisces→Aries | 84% | ||
| Thu 7 | Waning Gibbous | Aries | 75% | ||
| Fri 8 | Waning Gibbous | Aries→Taurus | 65% | ||
| Sat 9 | Waning Gibbous | Taurus | 55% | ||
| Sun 10 | Last Quarter | Taurus | 45% | ||
| Mon 11 | Waning Crescent | Taurus→Gemini | 36% | ||
| Tue 12 | Waning Crescent | Gemini | 27% | ||
| Wed 13 | Waning Crescent | Gemini→Cancer | 19% | ||
| Thu 14 | Waning Crescent | Cancer | 12% | ||
| Fri 15 | Waning Crescent | Cancer | 7% | ||
| Sat 16 | Waning Crescent | Cancer→Leo | 3% | ||
| Sun 17 | Waning Crescent | Leo | 0% | ||
| Mon 18 | New Moon | Leo→Virgo | 0% | ||
| Tue 19 | Waxing Crescent | Virgo | 2% | ||
| Wed 20 | Waxing Crescent | Virgo | 5% | ||
| Thu 21 | Waxing Crescent | Virgo→Libra | 11% | ||
| Fri 22 | Waxing Crescent | Libra | 18% | ||
| Sat 23 | Waxing Crescent | Libra→Scorpio | 26% | ||
| Sun 24 | Waxing Crescent | Scorpio | 36% | ||
| Mon 25 | First Quarter | Scorpio→Sagittarius | 47% | ||
| Tue 26 | Waxing Gibbous | Sagittarius | 58% | ||
| Wed 27 | Waxing Gibbous | Sagittarius→Capricorn | 69% | ||
| Thu 28 | Waxing Gibbous | Capricorn | 79% | ||
| Fri 29 | Waxing Gibbous | Capricorn→Aquarius | 88% | ||
| Sat 30 | Waxing Gibbous | Aquarius | 95% | ||
| Sun 31 | Waxing Gibbous | Aquarius→Pisces | 99% | ||
Rows are UTC calendar days. The exact times follow the timezone setting above, so a time close to midnight can belong to the neighbouring day in your own zone.
- 1
- Full moons
- 1
- New moons
- 14
- Sign changes
- 100%
- Brightest night
The Moon passes through 14 signs this month, in order: Capricorn, Aquarius, Pisces, Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius. It changes sign 14 times — roughly every two and a third days, though not evenly, because the Moon’s speed varies about twelve per cent over an orbit.
Frequently asked questions
When is the full moon in August 2031?
There are 1 in August 2031. The exact instants are in the table above, shown in your own timezone, with the degree and sign each one falls on.
When is the new moon in August 2031?
There are 1 in August 2031, listed to the minute in the table above along with every other phase of the month.
What timezone are these times in?
Your own, resolved in your browser. The rows are UTC calendar days, so an instant close to midnight can belong to the neighbouring day once converted — the table marks those with a small +1 or −1. You can switch the whole page to UTC if you want to compare it against a site that publishes UTC.
What sign is the Moon in during August 2031?
It moves through 14 of them, changing sign 14 times. The exact instant of each change is in the sign column above. The Moon spends about two and a third days in a sign, which is why it covers the whole zodiac in a month while the Sun takes a year.