Bureau of Meteorology senior forecaster Tom Fejes said south-west residents could expect a cold front from Monday evening.

He said showers were expected, with the possibility of hail.

"There's going to be very cold air coming up from the south this evening in the south-west," Mr Fejes said.

He said the temperature in Warrnambool would probably dip to 2C, while some inland south-west areas would have a low of about 1C.

"It's going to be pretty cold in Warrnambool the next few days," Mr Fejes said.

"The temperature will probably struggle to get to 11C.

"It's going to be quite windy on Tuesday so it will feel even colder."

Mr Fejes said the cold snap was expected to continue until the weekend, when the temperature may reach about 13C.

The bureau has also issued a warning to sheep graziers in the south-west.

"Sheep graziers are warned that showers and cold southwesterly winds are expected to develop across the south-west district late Monday and extend to the Wimmera, central, northern country, north central, north east, west and south Gippsland and east Gippsland forecast districts during Tuesday," it states.

"There is a risk of losses of lambs and sheep exposed to these conditions."

Have you signed up to The Standard's daily newsletter and breaking news emails? You can register below and make sure you are up to date with everything that's happening in the south-west.