Today across the south-west will be hot - very hot - with temperatures in the mid 30s.
At 7.30am in Warrnambool it was already 20.6 degrees and we are expecting a top of 35.
In Hamilton it will be about 37, Colac 37, Ararat 37, Casterton 37, Mortlake 38, Heywood 35, Portland 34, Port Fairy 35, Terang 35 and Camperdown 34.
The weather bureau says it's going to be hot, before a cool and windy change this afternoon.
It will be partly cloudy with a slight (20 per cent) chance of a shower this evening, with possible thunder.
Winds will be north to north-westerly 25 to 40 km/h tending west to north-westerly 25 to 35 km/h in the early afternoon then turning south-westerly 15 to 25 km/h in the late evening.
A high pressure system in the Tasman Sea is directing a hot northerly flow over Victoria ahead of an approaching low pressure trough.
The trough will enter western parts of the state during the afternoon and move into central parts in the evening.
A cold front will move across Tasmania late Monday and early Tuesday while the trough moves to the far east of Victoria.
Another trough will move across Victoria during Wednesday, then move north-east across New South Wales later in the week as a high pressure ridge extends across southern Victoria.
There's also a strong marine wind warning for the west coast.
For the week ahead across the south-west - Tuesday will be partly cloudy 18, Wednesday mostly cloudy 23, Thursday partly cloudy 17, Friday cloudy 17, Saturday mostly cloudy 17, Sunday partly cloudy 19 and next Monday mostly cloudy 17.
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