Australia in September: Weather, Crowds & What to Expect
Climate Map for September
Average temperature across Australia in September.
City Weather in September
| City | High | Low | Rain | UV | Feels |
|---|---|---|---|---|---|
| Sydney | 20° | 10° | 72 mm | high | Cool |
| Melbourne | 17° | 8° | 58 mm | moderate | Cool |
| Brisbane | 25° | 12° | 35 mm | high | Mild |
| Perth | 20° | 10° | 78 mm | high | Cool |
| Adelaide | 18° | 9° | 60 mm | high | Cool |
| Gold Coast, Queensland | 24° | 12° | 46 mm | high | Mild |
| Newcastle, New South Wales | 20° | 11° | 62 mm | high | Cool |
High / low are average daily temperatures (°C). “Feels” reflects how hot or cold it feels, allowing for humidity.
Northern Australia - Top End & Kimberley (Darwin, Kakadu, Broome, Kununurra)
The wet eases and the landscape remains lush; rivers and billabongs gradually start to recede although isolated heavy showers can still happen. This is a shoulder month for visitors seeking fewer crowds and lower prices while enjoying lingering green seasons across Kakadu and around Kununurra. Road conditions improve but some remote tracks might stay soft - a reliable 4WD is still a practical idea for exploring gorges.
Tropical Queensland & the Great Barrier Reef (Cairns, Port Douglas, Whitsundays, Torres Strait)
Adelaide and Melbourne’s spring contrasts starkly with Tropical Queensland’s warming: mornings are increasingly balmy and the reef-friendly seas warm into the low 20s, while afternoon breezes keep beach days comfortable. This is the start of the busier season for yachting the Whitsundays and for reef operators capitalizing on stable conditions. Expect moderate crowds and to see nesting seabirds returning to some islands.
Central Australia - Red Centre (Alice Springs, Uluru/Kata Tjuta, MacDonnell Ranges)
Spring warms quickly and the desert shows early signs of renewal where winter rains have fallen; daytime temperatures become pleasantly warm, easing into the mid-20s°C. It’s a great month for walking and for exploring lesser-visited gorges that open up for cooler mid-morning conditions. Keep an eye on pollen and dust during windy spells and carry sun protection for long exposed walks.
Eastern Seaboard - Sydney to Brisbane, including Blue Mountains and Byron Bay
Early summer leads to warmer, more humid conditions and a higher chance of severe thunderstorms producing heavy rain and localized flooding, particularly inland from the coast. Sydney hosts outdoor events and the beaches are busy; Byron Bay enters its busiest holiday period with a festival calendar looking lively. Take sun protection seriously and plan beach time for mornings or late afternoons to avoid the hottest part of the day.
Southern & Tasmanian Region - Melbourne, Great Ocean Road, Hobart, Launceston, Cradle Mountain
Early summer warmth returns with lengthening days and comfortable coastal conditions for swimming and boating; Tasmania is at its driest and most walkable, with popular tracks open and busy. The Great Ocean Road sees renewed visitors, while Melbourne hosts cultural festivals and outdoor markets in earnest. Pack sun protection and a light fleece for cooler evenings near water.
Southwest Australia - Perth, Margaret River, Albany, Esperance, Rottnest Island
By late spring the region is largely comfortable for outdoor activities: sea breezes moderate the heat and many coastal tracks are dry and accessible. Rottnest Island is lively with cyclists and snorkelers, and surf breaks around Margaret River pick up as winter swells tail off. Pack a windproof layer for exposed headlands and a light jumper for cooler evenings inland.