Sydney, Brisbane Melbourne weather: Five days of rain to strike huge parts of Australia after scorching weather

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Millions of Aussies are being warned to brace for intense rain and thunderstorms as a wet weather system sweeps across the country's east bringing an end to a stifling heatwave.  

A cool change has moved through parts of South Australia at the start of the week, before sweeping up the east coast late on Monday. 

It comes after millions of Aussies sweltered through hot and dry weather as large parts of the country's east saw temperatures hit the mid-to-high 30s and low 40s.

Weatherzone explained the most extensive and widespread rainfall is forecast for Tuesday, stretching from east of Albury to Bourke in NSW and into Thargomindah in southern Queensland. 

Thunderstorms are also expected everyday from Tuesday through to Saturday across the country's east, with significant activity in the more populated areas. 

The stretch of wet weather is set to contract further inland across NSW and South East Queensland on Wednesday. 

Extensive rainfall is expected 'right along the eastern seaboard' from Friday through to Saturday. 

Weatherzone explained the wet weather would lash a large area from Melbourne through NSW and up to Queensland's coast. 

A low pressure trough was set to bring a 'significant temperature drop', 'burst of southerly winds' and intense rain to parts of Victoria and NSW

While there is uncertainty with weather modules of how far inland the wet weather will travel, Weatherzone said it would impact the eastern half of NSW and Victoria. 

Bureau of Meteorology's Miriam Bradbury said a low pressure trough was set to bring a 'significant temperature drop' and 'burst of southerly winds' to residents along the east coast. 

Ms Bradbury said the cool change could bring showers, severe storms and flash flooding - with the heaviest rainfall expected in the north and central eastern parts of NSW.

'Severe storms may bring heavy rainfall that could lead to flash flooding through the course of this afternoon and evening,' she said.

'As we move into Tuesday, we're going to see that storm risk becoming a little bit more extensive across central and eastern parts of the state.

'With storms possible across much of the east coast, severe storms will once again be a risk but mostly covering parts of inland NSW, the western slopes and central Ranges.' 

Ms Bradbury added severe storms were forecast for Tuesday, with damaging winds and large hail possible. 

She said the wet and wild weather is likely to continue across NSW until Friday as the trough lingers close to the state's coast. 

Showers and thunderstorms are also forecast for Darwin, Brisbane and Canberra. 

Sydney 

Tuesday: Showers. Chance of a thunderstorm. Up to 40mm of rain. Winds up to 45km/h. Max 24C.  

Wednesday: Showers. Chance of a thunderstorm. Up to 30mm of rain. Winds up to 35km/h. Min 19C Max 24C. 

Thursday: Showers. Up to 8mm of rain. Winds up to 25km/h. Min 19C Max 26C. 

Friday: Showers. Chance of a thunderstorm. Up to 15mm of rain. Winds up to 20km/h. Min 20C Max 27C. 

Saturday: Showers. Chance of a thunderstorm. Up to 7mm of rain. Winds up to 20km/h. Min 21C Max 27C. 

The wet weather is expected to last for through to the weekend for Sydneysiders

Melbourne 

Tuesday: Partly cloudy. Winds up to 40km/h. Max 25C. 

Wednesday: Sunny. Winds up to 25km/h. Min 14C Max 29C. 

Thursday: Partly cloudy. Chance of a thunderstorm. Winds up to 25km/h. Min 18C Max 31C. 

Friday: Mostly sunny. Chance of a thunderstorm. Winds up to 20km/h. Min 19C Max 31C. 

Saturday: Partly cloudy. Slight chance of a shower. Chance of a thunderstorm. Winds up to 25km/h. Min20C Max 35C. 

Brisbane 

Tuesday: Partly cloudy. Winds up to 20km/h. Max 30C. 

Wednesday: Possible showers. Chance of a thunderstorm. Winds up to 20km/h. Min 21C Max 29C. 

Thursday: Showers. Chance of a thunderstorm. Up to 8mm of rain. Min 21C Max 29C.

Friday: Showers. Chance of a thunderstorm. Up to 15mm of rain. Winds up to 20km/h. Min 22C Max 28C. 

Saturday: Showers. Chance of a thunderstorm. Up to 15mm of rain. Winds up to 20km/h. Min 21C Max 27C. 

Canberra 

Tuesday: Showers. Chance of a thunderstorm. Up to 5mm of rain. Winds up to 30km/h. Max 20C. 

Wednesday: Slight chance of a shower. Winds up to 25km/h. Min 11C Max 23C.  

Thursday: Slight chance of a shower. Winds up to 20km/h. Min 10C Max 28C. 

Friday: Showers. Chance of a thunderstorm. Up to 5mm of rain. Winds up to 20km/h. Min 13C Max 27C. 

Saturday: Shower or two. Chance of a thunderstorm. Up to 3mm of rain. Min 14C Max 27C.

Thunderstorms are also expected everyday from Tuesday through to Saturday

Adelaide 

Tuesday: Sunny. Winds up to 40km/h. Max 27C. 

Wednesday: Mostly sunny. Up to 20km/h. Min 15C Max 32C. 

Thursday: Slight chance of a shower. Winds up to 25km/h. Min 20C Max 33C. 

Friday: Sunny. Winds up to 25km/h. Min 18C Max 33C. 

Saturday: Mostly Sunny. Winds up to 25km/h. Min 18C Max 33C. 

Hobart 

Tuesday: Mostly sunny. Winds up to 20km/h. Max 19C. 

Wednesday: Sunny. Winds up to 25km/h. Min 9C Max 24C. 

Thursday: Mostly sunny. Winds up to 20km/h. Min 14C Max 24C. 

Friday: Mostly sunny. Slight chance of a shower. Winds up to 25km/h. Min 14C Max 27C. 

Saturday: Possible shower. Winds up to 25km/h. Min 16C Max 28C. 

Perth 

Tuesday: Mostly sunny. Slight chance of a shower. Chance of a thunderstorm. Winds up to 40km/h.  Max 31C. 

Wednesday: Sunny. Winds up to 20km/h. Min 18C Max 29C. 

Thursday: Sunny. Winds up to 25km/h. Min 15C Max 30C. 

Friday: Sunny. Winds up to 30km/h. Min 17C Max 27C. 

Saturday: Sunny. Winds up to 25km/h. Min 17C Max 29C. 

It comes after the state sweltered through a heatwave with temperatures soaring to the mid-to high 30s and low 40s (pictured, beachgoers at Bondi Beach)

Darwin 

Tuesday: Showers. Chance of a thunderstorm. Up to 15mm of rain. Max 33C.

Wednesday: Showers. Chance of a thunderstorm. Up to 9mm of rain. Min 25C Max 34C.

Thursday: Showers. Chance of a thunderstorm. Up to 6mm of rain. Min 26C Max 34C.

Friday: Showers. Chance of a thunderstorm. Up to 4mm of rain. Min 26C Max 34C. 

Saturday: Showers. Chance of a thunderstorm. Up to 3mm of rain. Min 25C Max 34C.