Motorists should continue to take extra care and allow extra travel time.

Illawarra residents should expect a week of on and off showers and potential flooding.

Commuters should take it easy on the M1 Princes Motorway with very heavy rain falling in parts along the drive to Sydney.

There is heavy traffic southbound on Mount Ousley at 8am as drivers cautiously descend the escarpment in the wet weather.

Read more: 'Goodbye, little warrior': family shattered after tragic death of Warilla High teen

The Bureau of Meteorology is warning the Illawarra coast could get minor flooding as a coastal trough is bringing more showers and thunderstorms onshore.

Recent heavy rainfall along the east coast has left the region saturated.

The Illawarra Highway remains closed through Macquarie Pass.

Drivers should be careful as minor flooding can develop quickly.

People should not drive, walk or ride through floodwater.

Greater Sydney's total dam storage supply is 73 per cent.

A hazardous surf warning is in place on Friday with large surf and swell conditions.

People should avoid coastal activities such as rock fishing, boating, and swimming.

Showers are expected to continue through to Wednesday next week with temperatures in the mid to low 20s.

Less than 10mm of rain is forecast each day for the next seven days in Wollongong and Albion Park.

Local State Emergency Service crews are gearing up for storm-related and flooding call outs.