Overview
- The full moon is billed as 2025’s last supermoon, with visibility highlighted from the evening of Dec. 4 and a broad viewing window in some regions through Dec. 6.
- Reported peak timing differs by outlet, with Newsweek and Daily Galaxy citing 6:14 p.m. EST on Dec. 4 while Forbes lists the exact fullness at 8:20 a.m. EST.
- Forbes reports the moon will be about 221,965 miles (357,218 km) from Earth, making it the second-closest and thus one of the year’s biggest and brightest full moons.
- NASA frames a supermoon as a full moon occurring within roughly 90% of perigee, which can make it appear up to about 14% larger and around 30% brighter than one at apogee.
- Best viewing is just after moonrise to catch the ‘moon illusion’ and darker skies; The South African notes it will appear over 90% full from Dec. 2–6, and some outlets add this is the third of four supermoons spanning into early 2026 with the next expected on May 16.