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Severe weather warnings in five states in warm, windy start to the week

Maximum temperatures in the low-to-mid-twenties can be expected for all southeastern capital cities this Monday, as a surge of warm air from the interior blankets the region ahead of a cold front due on Tuesday.

Strong, potentially damaging wind gusts will accompany the warmth, with severe weather warnings issued for all four southeastern states plus the ACT.

Predicted maximum temperatures for the southeastern capitals this Monday, Tuesday and Wednesday are:

• Adelaide: 25°C, 17°C, 17°C
• Melbourne: 24°C, 19°C, 16°C
• Hobart: 23°C, 17°C, 13°C
• Canberra: 21°C, 21°C, 17°C
• Sydney: 26°C, 28°C, 23°C

Showers can be expected later today in Adelaide, from this evening through into Tuesday in Melbourne, and on Tuesday in Canberra. Only a light shower is possible in Hobart on Tuesday, with no rain at all likely over the period in Sydney – which locals will appreciate after last week’s wettest September day in 146 years.

Away from the capitals, the September temperature see-saw will be most pronounced in forecast districts like the Murraylands and Riverland in South Australia, and the Mallee in NW Victoria, where Monday’s maximum should be a full ten degrees warmer than Tuesday’s.

The weather pattern for the first half of this week is typical for early spring in southern Australia, when wintry cold fronts still regularly flick Tasmania and the far south of the mainland, with periods of warmth between the cooler systems.

Image: Predicted maximum temperatures for SE Australia according to the ECMWF model on Monday, September 15, 2025.

Strong, gusty winds are another classic early spring feature of the weather at present, with a severe weather warning for damaging winds in place for residents in numerous forecast districts in Victoria, South Australia, Tasmania, southern NSW, and the ACT.

The BoM's threshold for issuing these warnings is when gusts may exceed 90 km/h on the mainland or 100 km/h in Tasmania.

Image: Expected maximum wind gusts at 4pm across SE Australia on Monday, September 15, 2025.

Please check the Weatherzone warnings page for the latest warnings for your area.