Partial lunar eclipse UK: times and viewing guide for 28 August 2026

The partial lunar eclipse on Friday 28 August 2026 begins at 2:23am BST in the UK, with the partial phase starting at 3:33am and maximum eclipse at 5:12am, according to Royal Observatory Greenwich. It is safe to view with the unaided eye: the real constraints are cloud, a clear south-western horizon and the Moon setting before the astronomical event has completely finished.

01

What happens, and when should you look?

This is a partial lunar eclipse, not a solar eclipse. Earth moves between the Sun and the full Moon and part of the Moon enters Earth’s darkest shadow, the umbra. NASA lists the August 27–28 event as visible across the Americas, Europe, Africa and western Asia. From the UK, the useful window is the early morning of 28 August because the local clock has already moved into BST.

Royal Observatory Greenwich gives 2:23am BST for the penumbral start, 3:33am for the partial phase, and about 5:12am for maximum. It says roughly 93% of the Moon’s visible surface will be within the umbra at maximum. London moonset is about 6:15am, so the partial phase’s formal end at roughly 6:51am is not fully visible there. Times and horizon height vary across the country, so a city-specific check remains worthwhile.

• The most dramatic UK phase runs from 3:33am BST toward a 5:12am maximum.
• Moonset means the final stages may be below the horizon.

02

Why a low south-western horizon matters

The Moon will be low as the eclipse deepens. Royal Observatory Greenwich recommends a location with a clear view toward the south-western horizon; buildings, trees, hills and a nearby roofline can hide the Moon even if the sky is otherwise clear. A public park, waterfront or open elevated place may help, but only use a location that is legal, accessible and safe at that hour. Do not trespass or stand near roads to chase a view.

Weather is the other variable that cannot be settled four days ahead. Cloud breaks can be enough for a glimpse, while a detailed cloud map should not be treated as a guarantee. Check the Met Office forecast for your precise area on the evening before and again before leaving. If conditions are poor, an official livestream is a reasonable alternative, but it does not change what can be seen from a local horizon.

• Choose a safe, open view toward the south-west.
• Use a local forecast close to the event rather than relying on an early prediction.

03

No eclipse glasses, but set realistic expectations

Unlike a solar eclipse, a lunar eclipse is safe to watch directly. The Moon is reflecting sunlight rather than presenting the Sun’s bright disc, so no special eclipse glasses are required. Binoculars or a small telescope can add detail, but they are optional. Never use solar-viewing advice designed for the 12 August solar eclipse as a requirement for this event; the safety guidance is different.

A partial eclipse does not turn the whole Moon black. The portion inside the umbra can look coppery or reddish because sunlight passing through Earth’s atmosphere is filtered and bent toward the lunar surface, while another portion remains illuminated. The precise colour, contrast and visibility depend on sky clarity and your eyes rather than on a promised photographic result. Keep expectations modest and enjoy the changing shadow rather than hunting for an exact image.

• A lunar eclipse can be viewed without solar glasses.
• It is partial: expect a changing dark and sometimes reddish section, not total darkness.