A super blue moon is a rare phenomenon that occurs when a full moon coincides with two uncommon moon traits: a supermoon and a blue moon. A supermoon occurs when the full moon phase of the lunar cycle syncs up with the perigee, or when it is nearest to the Earth, making it appear brighter and bigger than regular full moons. A blue moon is the term for when we see the full moon twice in a single month. The term "super blue moon" is used when a full moon occurs within a day or so of perigee and is also the second full moon in a calendar month.

During a super blue moon, the moon appears up to 14% larger in apparent diameter or 30% brighter than an average full moon. However, the moons color does not change during a blue moon, and it usually appears milky gray. The last super blue moon occurred in August 2023, and the next one is expected to occur in 2037.