On Monday, August 11, 2025 the Moon was in its waning gibbous phase, with 89% of its disk illuminated and an age of 17.8 days since the last new moon. The lit part starts to shrink. The Moon rises a few hours after dusk and is still in the sky when day breaks.
Moon data for this date
| Phase | 🌖 Waning Gibbous |
|---|---|
| Illumination | 89% |
| Moon age | 17.8 days |
| Day of the week | Monday |
| Last new moon | July 24, 2025 at 16:11 |
| Next full moon | September 7, 2025 at 15:08 (in 27.1 days) |
| Next new moon | August 23, 2025 at 03:06 (in 11.6 days) |
The Moon on the surrounding days
Compare the phase and illumination over the three days before and after. Click a day to open its page.
← August 10, 2025 August 12, 2025 →
About the waning gibbous
The lit part starts to shrink. The Moon rises a few hours after dusk and is still in the sky when day breaks. The phase name comes from the Moon's position in its 29.53-day cycle: on August 11, 2025 it had completed 61% of the cycle that began with the new moon on July 24, 2025.
Looking for another date, such as a birthday? Use the Moon phase on the day I was born tool, see the Moon phase today page with the lunar calendar, or find the day of the week of August 11, 2025. For sun times, check sunrise and sunset.