May 2026 will feature a rare occurrence of two full moons, including a Blue Moon, within the same month. The first full moon, known as the Flower Moon, rises on May 1 at 20:46 local time in London. This event presents an excellent opportunity for stargazers and astrophotographers alike.
The Flower Moon is named for the spring flowers that bloom in May. It reaches its peak brightness at 1:23 p.m. ET on the same day, which means it will be visible past midnight into the early hours of Saturday morning. Observers may also notice atmospheric phenomena such as Earthshine or even a lunar halo—an optical effect caused by ice crystals in the atmosphere.
On May 31, the second full moon of the month, referred to as a Blue Moon, will occur at 4:45 a.m. ET. This moon is classified as a micromoon, meaning it appears smaller and less bright than regular full moons. A typical full moon occurs approximately every 29.5 days, making this double occurrence quite special.
Both full moons in May are classified as micromoons, contrasting with supermoons that can appear about 14% larger and up to 30% brighter than average full moons. The unique viewing conditions during these lunar events can enhance the beauty of the night sky.
While these lunar events provide an exciting spectacle for enthusiasts and photographers, uncertainties remain regarding weather conditions and visibility on specific dates. Observers should prepare for potential atmospheric interference that could affect their viewing experience.
