Labor has pledged $25 million for six such centres across the state, to be modelled on successful centres operating in the ACT and UK.

The NSW centres - which will be open from 7.30am to 10pm seven days - would also be set up at Glenmore Park, Gosford, Burwood, Waverley and Camden.

Labor's health spokesman Walt Secord said up to 10 nurses would be employed at each of the sites, providing residents aged two and above free access to advice and treatment for minor illnesses and injuries.

"This would take the pressure off emergency departments - for instance we know Wollongong, Shellharbour and Shoalhaven hospitals have higher than average presentations in triage four and five categories," Mr Secord said.

"These are the least urgent categories - for things like blocked ears, scrapes and cuts and fevers. Things that people could go to a GP for - but maybe they can't get into a GP, the medical centres nearby are closed, or they can't afford to pay a gap fee."

Labor's treasury spokesman, Keira MP Ryan Park, said the centres would rely on highly skilled nurses with advanced qualifications.

"Once you get south of Shellharbour access to this type of walk-in facility is really important," he said.

"Kiama has a large population of older people and there's also limited services there, so it's a great location.

"We know Wollongong Hospital's ED in particular is feeling the pinch, so this centre is designed to take some of that pressure off."

Mr Secord said if successful at the state election, Labor would immediately start planning for the centres which would be set up within 18 months.