Adelaide and Melbourne will start off the New Year with a bit of heat.  

A broad trough stretching across eastern SA, western NSW and into central VIC is bringing some very warm air to the southern capitals.  

Adelaide is expecting 36 degrees today with light winds, clear skies and a weak sea breeze all playing their part in keeping the temperature up. As the trough moves eastwards tomorrow, a cooler southerly airmass will keep the temperatures more comfortable during the week. 

Maximum temperature Sunday using ACCESS-G Sat 12Z

Melbourne will feel a particularly uncomfortable 35 degrees with moist north to northeasterly winds blowing across the city increasing the humidity. Temperatures will continue to be warm well into the night with the mercury only expected to drop to 24 degrees. 

Surface wind and relative humidity at 8pm Sunday using ACCESS-G Sat 12Z 

These hot and humid conditions will continue into Monday morning as the trough lingers over the area before moving east. Afternoon thunderstorms are expected with some storms having the potential to become severe. A cool change will push through during the late afternoon. 

So how about our other capital cities? 

Brisbane, Sydney, and Canberra will be partly cloudy with showers, and Hobart partly cloudy, with temperatures in these centres only managing to reach the high 20s. 

Darwin is experiencing a wet start with the monsoon trough strengthening (thanks to ex-Tropical Cyclone Ellie) with heavy rainfall, windy conditions and a top temperature of 30 degrees. 

Perth is also kicking off 2023 with a maximum temperature of 30 degrees before heating up later in the week as a trough brings in hot northeasterly winds.