Cold blast could bring snow to southern states

It could snow in parts of Australia's southern states this weekend, as a cold blast sweeps in.

Forecasters say the first snow of winter could fall on higher ground in a signal the warm summer weather is finally over.

Snow is forecast below 700m in Tasmania, and 900m in Victoria, NSW while the ACT is heading for sub zero temperatures by Monday.

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Victoria has already cooled down from 30C earlier this week to 17C today - but over the weekend it will drop to as low as 9C overnight.

It will only reach 15C during Sunday, with showers forecast.

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Canberra is expected to plunge below zero on Monday.

The low will be -1C, while it'll be a warmer 17C in the daytime.

Meanwhile, Adelaide will see a low of 12C over the weekend, with Sunday reaching 19C.

Over in Tasmania, Hobart will be a cool 7C overnight at the weekend, rising to 15C on Saturday and 13C on Sunday.

Sydney will largely escape the cold blast, with highs of 25C expected on Saturday.

This cold snap is being caused by two cold fronts.

They've already moved through Tasmania and Victoria and will head towards eastern Victoria today.

Tomorrow another cold front will come through, bringing more cold air.