It comes as NSW added 1116 cases in the 24 hours to 8pm on Tuesday evening.

The state had 148,000 people vaccinated on Tuesday and more than 170,000 tests.

Four deaths were also recorded: four women who were not vaccinated and had underlying health conditions, Ms Berejiklian said.

International travel could return for NSW residents after the state hits its target of 80 per cent fully vaccinated, a milestone NSW Premier Gladys Berejiklian says is expected in November.

Newcastle's outbreak has hit 77 active cases and 646 close contacts.

Four of the fresh cases are in Lake Macquarie: one at Whitebridge, one at Belmont, one at Swansea Heads and another in Catherine Hill Bay.

All four were infectious in the community and are linked to known cases.

Newcastle had a fresh case infectious in the community at Jesmond that is a mystery. Investigations into its source are ongoing, while an Elermore Vale case was isolating and is linked to a known case.

Two more cases on the Central Coast were linked to previous infections.

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They were aged in their 50s, 60s, 70s and 80s.

Wednesday's cases updates followed a slew of fresh exposure sites in the Hunter, including a Sydney tree lopping firm that was active in the region for two weeks and has multiple employees who have since tested positive.

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