Why it's unseasonably warm in southern parts of Australia at the moment

A high-pressure system over Australia is driving a run of unseasonably warm autumn weather in the nation's southern states this week.

Northerly winds moving anticlockwise around the high is dragging warm air from the middle of the country south, according to WeatherZone.

The pattern, which is bringing warm and dry conditions to Victoria, South Australia and even Tasmania, will remain in place for several days as the high drifts east.

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The mercury is set to reach 29 degrees in Adelaide today, while Melbourne is forecast to peak at 26 degrees and Hobart could hit 20 degrees and sunny.

The maximum temperature is not expected to dip below 23 degrees in Adelaide, Melbourne or Hobart until Sunday.

Adelaide is heading for maximum temperatures between 24 and 28 degrees over the next week, well above the April average of 22.2 degrees.

The temperature in Melbourne should hover around 25 degrees into the weekend, before dipping to 21 and partly cloudy on Monday, which is still above the April average of 20.4 degrees.

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Hobart is expected to smash its average April temperature of 17.5 degrees as it heads towards a sunny top of 25 degrees on Friday.

There's minimal rain on the radar for Victoria and South Australia mainly sunny days forecast across the next week before a few clouds move in early next week.

Tasmania is forecast to receive some rain tomorrow before conditions clear towards the end of the week.

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