Light Pollution Map Australia
Learn how light pollution affects Australia's night skies and how the Bortle scale rates it by eye, from a pristine Class 1 to a washed-out Class 9 city sky. Enter your postcode, or tap any point on the map, to browse the nearest dark sky sites, from DarkSky-certified parks and reserves to observatories and remote outback locations. The light pollution layer on the map shows sky brightness from 2024 NASA/NOAA VIIRS satellite data: its colours are light pollution zones, not Bortle classes, so we don't print a Bortle number for your location. The moon phase panel tells you whether tonight is worth heading out.
Why check light pollution before you go
Most Australians live under bright coastal skies. Sydney, Melbourne, Brisbane, Perth and Adelaide all have bright city skies, where the Milky Way is lost and many fainter stars disappear. On John Bortle's scale, city skies are class 8 to 9, and only a class 1 sky, the darkest there is, lets the Milky Way's core cast a visible shadow. But Australia is also one of the best places on Earth to see the night sky: drive a few hours inland from almost any capital and you can reach truly dark skies.
The Southern Hemisphere gets the better half of the sky. The centre of the Milky Way passes almost directly overhead in winter, the Magellanic Clouds are visible on any dark night, and the Emu in the Sky, the dark-nebula constellation central to many Aboriginal astronomical traditions, stretches across the whole galactic band. From Tasmania, the aurora australis is a regular bonus.
Australia's certified dark sky places include Warrumbungle National Park in NSW, the Southern Hemisphere's first Dark Sky Park, the River Murray International Dark Sky Reserve in South Australia, and an outback sanctuary in western Queensland. Use the light pollution layer and its legend to gauge roughly how dark your own sky is likely to be, compare it with the nearest listed sites, and pick a new moon weekend: the moon phase panel shows the next one.
How to use this dark sky finder
Enter an Australian postcode in the search box, or tap any point on the map, and the nearest dark sky sites appear in the results panel, ranked by distance, making it easy to spot whether a certified reserve, an observatory or a dark national park is within reach. Filter by category to narrow the list to what you're actually looking for. Toggle the light pollution layer to see how the glow spreads around cities and where it fades, and use the opacity slider to fade it against the map underneath. Its colours are David Lorenz's light pollution zones, from 0 (black, a natural dark sky) to 7b (white, the brightest city centres), with each zone explained in the legend in the sidebar; they are not Bortle classes. Before you commit to a trip, check the moon phase panel: a bright moon washes out faint skies as thoroughly as a town does, and the panel shows the next new moon so you can pick the darkest weekend.
Who uses this tool?
Find genuinely dark skies within driving distance and time trips to the new moon, when the Milky Way core is at its best.
Pick overnight stops with genuinely dark skies, from national parks to remote outback rest areas.
Tasmania and coastal Victoria get regular aurora australis displays; dark southern horizons make the difference between a glow and a show.
Compare certified dark sky places across every state and territory when planning a stargazing holiday.
Explore how city lights affect what we can see, and why remote Australia hosts some of the world's major observatories.
Moving regional? Check what the night sky looks like from a suburb or town before you commit.
Frequently asked questions
What is the Bortle scale?
It rates night-sky darkness from 1 to 9. Class 1 is a pristine dark sky where the Milky Way casts shadows; class 9 sits at the opposite extreme, so bright that only the Moon, a few planets and the very brightest stars break through. In John Bortle's own descriptions, suburban skies are class 5 to 6 and city skies class 8 to 9. The further you get from a city, generally the darker the sky.
Is this a Bortle scale map?
No. The map's colours are David Lorenz's light pollution zones (0 to 7b), which show sky brightness straight up (zenith brightness), modelled from satellite data, while the Bortle scale is a subjective, whole-sky assessment made by an observer on the ground, light domes on the horizon included. Lorenz compared the two directly using 397 nights of real observations from the US National Park Service's Night Sky Team and recommends not treating them as the same thing. The colour people usually pair with a Bortle class tends to be too optimistic: yellow is more often Bortle 5 than 4, and orange more often Bortle 6 than 5. That's why we show the light pollution zone rather than printing a Bortle number for your location.
How do I find the light pollution reading for my location?
The light pollution layer on the map shows sky brightness around your location, modelled from satellite data rather than measured on the ground. Its colours are light pollution zones, explained in the legend beside the map, not Bortle classes, and we don't print a single figure for your exact spot. As a general guide, the further you are from a major city, generally the darker your sky. Local conditions, like a neighbour's floodlight or a nearby main road, can make your exact spot brighter than the wider area suggests. Enter your postcode, or tap your location on the map, to find the nearest certified dark sky sites ranked by distance, and check the moon phase panel before you go.
Where are the darkest skies in Australia?
The darkest skies are in the inland and outback: on the light pollution map, which is modelled from satellite data, western Queensland, the NT, northern SA and inland WA show the least artificial light. For certified sites with visitor facilities, Warrumbungle National Park in NSW and the River Murray International Dark Sky Reserve in SA are the best-known, and this map lists dozens more from Tasmania to the Kimberley.
What's the best time of year to see the Milky Way in Australia?
The galactic core is highest in the evening sky from roughly May to September, and it passes nearly overhead from most of Australia, one of the advantages of southern skies. Aim for the week either side of a new moon; the moon phase panel on this page shows the next one.
Can I see the aurora australis from mainland Australia?
Strong displays are regularly photographed from Tasmania and occasionally from coastal Victoria and southern WA during major geomagnetic storms. You need a dark southern horizon over water or empty land, so dark south-coast locations give the best chance.
Related Tools
More Australian mapping and stargazing tools:
- Crow-Flies Distance - measure the straight-line distance to a dark sky site
- Radius Map - draw a radius to see every dark sky site within reach of home
- Nearest Postcodes - the closest Australian postcodes to any location, ranked by distance
- Elevation Finder - higher, more remote ground often pairs with darker skies