All the border changes, COVID-19 lockdown rules across Australia

Daily case numbers pushed "disturbingly high" and neared 500 as the state recorded seven deaths in the past 24 hours.

NSW recorded 478 cases from 157,000 tests in the 24 hours to 8pm on Sunday.

Premier Gladys Berejiklian said only two had received one dose of the vaccine, with the other five unvaccinated. It was not immediately clear how many were active in the community despite lockdown across the entire state.

Deputy Premier John Barilaro said there were 35 cases in the Dubbo and Walgett areas, while Hunter New England added 16 cases.

Victorian Premier Daniel Andrews announced the Melbourne lockdown would be extended for two weeks and a curfew would be implemented in Melbourne.

"I don't want us to finish up like Sydney where it's fundamentally got away from them," Mr Andrews said.

"They're not reopening anytime soon. They're locked in until they pretty much get the whole place vaccinated, that's going to take months."

The curfew, which will be enforced by police, will force residents to stay home from 9pm to 5am. Some exemptions will exist while essential workers will need permits as they did in 2020.

Mr Andrews said the changes apply to Greater Melbourne.

The new restrictions come as Victoria recorded 22 new cases of COVID-19, of which only 14 were in isolation throughout their infectious period.

The territory's lockdown has been extended to September 2, after 19 new COVID-19 cases, including an aged care worker and a student, were recorded on Monday.

The lockdown was originally due to lift at 5pm this Thursday. Arrangements for the lockdown extension were being finalised and this would be announced on Tuesday.

"We do not want to see the numbers continue to grow, we do not want to see exponential growth as we have seen in other jurisdictions," ACT Chief Minister Andrew Barr said.

Hundreds of ANU students also are being monitored under strict isolation rules after it emerged some had been deemed close contacts of a new positive COVID-19 case.

Greater Darwin and Katherine are a snap three-day lockdown after a positive Covid-19 case was recorded. The lockdown began at noon today.

It makes it the second lockdown in three months for some in the NT. Alice Springs and Greater Darwin was sent into lockdown in June after a number of workers at the Tanami mine tested positive to the virus.

Unless essential workers from NSW can prove they've had at least one coronavirus shot they will be locked out of the sunshine state.

There were no new cases of COVID-19 today and it's been 10 days since there was an infectious case in the community. But Premier Annastacia Palaszczuk says she will do everything in her power to avoid importing new cases from NSW, meaning cross-border movements must be kept to an absolute minimum.

Essential workers who live south of the border but work in Queensland have until Friday to get their first shot.

Queensland currently has 129 active cases, and 3325 people remain in home quarantine.

Western Australia became the first state in Australia to require a COVID "vaccine passport" for domestic travel.

Travellers to WA from NSW will need to prove they have received at least the first COVID jab and will need to return a negative COVID-19 test 72 hours before departure. The new measures begin on Tuesday, August 17, when NSW is reclassified as "high risk".

The islanders' border Tasmania will close its borders to Greater Darwin and Katherine this afternoon.

That means it's closed to NSW, the ACT, Victoria and parts of Queensland - 11 local government areas in south-east Queensland, plus Cairns and Yarrabah - as well as specific interstate exposure sites, including in WA. All other travellers must register with Tas e-Travel.

South Australia is "very likely" to change COVID-19 border arrangements with the Northern Territory after Darwin and Katherine were plunged into a three-day lockdown.

Mid-afternoon Monday, the border is closed to travellers from Victoria (with a 70km bubble for border communities) and Queensland, with testing and 14-days' self-quarantine for returning residents. It is also closed to NSW & ACT, with residents needing an exemption to return. It is mandatory to have a Cross Border Travel Registration.