Sydneysiders have been warned to brace for another burst of storm activity, while residents on the NSW Central Coast can expect to cop some of the worst weather.
The Bureau of Meteorology says widespread thunderstorms will arrive on Tuesday afternoon particularly across southeastern and central NSW.
Sydney and Canberra could experience severe storms but the main focus will be the Illawarra region and up towards the Central Coast, meteorologist Dean Narramore said in a video statement.
"We could have some very dangerous thunderstorms there with very large hail, damaging winds and very heavy rainfall", Mr Narramore said.
Storms will hit NSW on Tuesday afternoon and stretch into the evening. They could occur anywhere from the Victorian border to Queensland.
"There's a chance of storms, some severe, in a large area of NSW today," the BOM tweeted.
Some places could receive up to 50 millimetres while other areas could miss out altogether, the bureau says.
The storm activity will shift more to central and northern NSW on Wednesday with the wet weather clearing later in the week. But the recurring rain doesn't mean the heat won't return.
"We can get quite a few heatwaves and bursts of heat as we get into March," Mr Narramore said on Tuesday.