September 2025 Full Moon. It occurs around the autumn equinox and is famous for rising right after sunset for several days in a row. Thus, the new moon is 0%, the full is 100%, and both are growing and shrinking 50%.

The september 2025 full moon will be on tuesday september 17, 2025 10:34 pm edt or september 18, 2025 2:34 am utc. The intervals between moonrises get really short.