Australia in September: where is it warmest?
In September, Darwin is the warmest place with 33 °C by day, Launceston the coolest with 14 °C. 22 of 24 destinations have good holiday weather.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| Darwin | 89 | 33° | 28° | 10 h | 4 |
| Broome | 96 | 32° | 26° | 9 h | 0 |
| Alice Springs | 93 | 28° | – | 10 h | 2 |
| Townsville | 99 | 27° | 24° | 10 h | 4 |
| Airlie Beach (Whitsundays) | 98 | 26° | 24° | 11 h | 3 |
| Coober Pedy | 98 | 25° | – | 8 h | 2 |
| Cairns | 95 | 25° | 25° | 9 h | 5 |
| Mackay | 87 | 24° | 23° | 8 h | 4 |
| Brisbane | 96 | 23° | – | 9 h | 6 |
| Sunshine Coast | 94 | 23° | 21° | 9 h | 7 |
| Toowoomba | 100 | 22° | – | 9 h | 4 |
| Gold Coast (Surfers Paradise) | 72 | 22° | 22° | 9 h | 5 |
| Byron Bay | 69 | 22° | 21° | 9 h | 7 |
| Newcastle | 92 | 21° | 19° | 8 h | 6 |
| Sydney | 91 | 20° | 19° | 8 h | 7 |
| Wollongong | 90 | 19° | 18° | 8 h | 7 |
| Perth | 87 | 19° | 19° | 8 h | 8 |
| Adelaide | 81 | 17° | 14° | 7 h | 9 |
| Melbourne | 66 | 17° | 12° | 6 h | 11 |
| Port Lincoln | 28 | 17° | 15° | 7 h | 7 |
| Canberra | 72 | 15° | – | 7 h | 8 |
| Geelong | 62 | 15° | 13° | 6 h | 10 |
| Hobart | 61 | 15° | 12° | 7 h | 11 |
| Launceston | 57 | 14° | – | 7 h | 12 |
Australia in September: quick answers
Australia in September: where is it warmest?
The warmest places in September are Darwin (33 °C), Broome (32 °C) and Alice Springs (28 °C).
Australia in September: where is the sea warmest?
The sea is warmest at Darwin (28 °C), Broome (26 °C) and Cairns (25 °C).
Australia in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in Toowoomba, Townsville and Airlie Beach (Whitsundays).
Australia month by month
Australia: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences