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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Coast Monitor Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
September marks the start of spring in Australia, bringing milder temperatures and longer daylight hours, but conditions vary greatly by region. In Sydney, average highs reach 21°C, while Melbourne sees around 17°C, and both cities can experience early spring rain. This month often features a mix of warm days and cool nights, so layering is key.
What is the typical September weather across Australia?
For most of southern Australia, September is a transition month from winter to spring. In Melbourne and Victoria, expect cool mornings with afternoon highs averaging 16–18°C and occasional rain. Sydney’s September weather is milder, with temperatures ranging from 13°C to 21°C, and humidity levels rising. In Brisbane, it’s warmer, with highs near 24°C and less rain. Perth enjoys sunny, mild days around 20°C, while Adelaide averages 18°C. For hourly conditions, check the Sydney weather page.
How does September weather compare for Melbourne and Sydney?
Melbourne’s September weather is typically cooler and windier than Sydney’s, with average lows of 9°C and highs of 17°C. Sydney’s September weather is more settled, with daytime temperatures often reaching 21°C and sea breezes moderating the heat. Both cities can experience sudden showers, so pack a waterproof jacket. For detailed forecasts, see the Melbourne weather page.
What should I pack for September weather in Victoria?
Pack layers for Victoria’s spring variability: a light jumper or jacket for mornings and evenings, plus a waterproof coat for sudden showers. Daytime highs in Melbourne average 17°C, but wind chill can make it feel cooler. For hourly forecasts, check the severe weather warning page for any storms.
Is September a good time to visit Sydney?
Yes, September offers pleasant weather in Sydney with average highs of 21°C and lower humidity than summer. It’s ideal for outdoor activities, though occasional rain is possible. The Australia weather hub has more details on regional conditions.
Does it rain a lot in September in Australia?
Rainfall varies: Sydney gets about 80mm in September, while Melbourne sees around 60mm. Southern cities like Adelaide are drier, with 40mm. Spring storms can bring heavy bursts, but overall, September is a moderate month for rain across most of the country.