[category]
[title]
You know what they say about things happening “once in a blue moon” – well, the old saying couldn’t be any more accurate for describing this weekend’s celestial event. This Sunday (May 31), Australia's night sky will witness a rare double spectacle: a Blue Moon that also happens to be a micromoon.
It’s the smallest and faintest full moon of the entire year, and a combo like this won't happen again until 2053! Here’s everything you need to know about seeing the blue micromoon across Australia this weekend.
When is the May 2026 full moon?
Mark your calendar for Sunday, May 31. In most Australian cities, the Blue Moon will reach peak fullness just as the evening sky is settling into that dusky blue sweet spot. Conveniently, this means you won’t need to stay up until all hours to catch it at its brightest. Peak times include:
- Adelaide – 6.15pm
- Brisbane – 6.45pm
- Canberra – 6.45pm
- Darwin – 6.15pm
- Hobart – 6.45pm
- Melbourne – 6.45pm
- Sydney – 6.45pm
- Perth – 4.45pm
You can find the exact timing of your city's moonrise and moonset on TimeAndDate.com.
How to see the blue micromoon in Australia?
The blue micromoon is a relatively easy one to spot if the clouds behave. Your best bet is to find a spot with a clear view of the southern horizon – beaches, open parklands or anywhere without too many buildings blocking your line of sight. The lower the moon sits, the more atmospheric the show: it may glow orange or reddish, thanks to light scattering through thicker layers of Earth’s atmosphere.
When it comes to fully appreciating the full moon, the darker the area you're in, the better. You can find our top recs in this handy guide to the best stargazing spots around Australia.
What is a Blue Moon?
A Blue Moon has nothing to do with the actual colour of the moon. Instead, it’s a term used to describe the second full moon that occurs in a specific timeframe – which, in this case, is the month of May.
What is a micromoon?
Now for the twist. This particular Blue Moon is also a micromoon – which sounds tiny and, technically, is. The moon doesn’t orbit Earth in a neat circle; it moves in an elongated oval. That means sometimes it swings closer to us (perigee), and sometimes it drifts farther away (apogee). A micromoon occurs when a full moon lines up with the furthest point.
On this night, the moon reaches fullness just before it hits apogee, sitting roughly 406,000 kilometres away. The result? It will appear approximately six per cent smaller and ten per cent dimmer than your average full moon. Before you start squinting: no, it won’t look obviously mini. In fact, thanks to a visual quirk called the moon illusion, it might actually seem larger when it’s low on the horizon. Astronomy loves a contradiction.