May 2026 will feature a rare occurrence of two full moons in the UK, specifically the Flower Moon on May 1 and a Blue Moon on May 31. This event not only captivates astronomy enthusiasts but also presents an opportunity for stargazing and astrophotography.
The first full moon, known as the Flower Moon, will rise at 20:46 local time in London and is named for the spring flowers that bloom during this month. It is noteworthy that this full moon reaches its peak brightness at 1:23 p.m. ET, which occurs in the middle of the day.
The subsequent Blue Moon will occur later in the month on May 31 at 4:45 a.m. ET. Both full moons are classified as micromoons, indicating they will appear smaller and less bright than typical full moons. For context, supermoons can be up to 14% larger and 30% brighter than regular full moons.
A lunar halo may also be visible during these events—this phenomenon occurs when moonlight refracts through ice crystals in the atmosphere, creating a ring around the moon with a diameter of approximately 22 degrees. The Flower Moon will remain visible past midnight into the early hours of Saturday morning.
As both lunar events approach, many enthusiasts are preparing for enhanced astrophotography opportunities. The unique conditions surrounding these micromoons may allow for interesting captures of Earthshine—a phenomenon where sunlight reflects off Earth onto the moon’s dark side—adding depth to photographs taken during this period.
Despite the excitement surrounding these events, uncertainties persist regarding weather conditions that could impact visibility on those nights. Astronomers suggest keeping an eye on local forecasts as May approaches to maximize viewing experiences.