The man in his 60s is part of the known Port Stephens family cluster. He remains in isolation.

"We are currently working to identify all close contacts of this case, who are being placed in isolation," a HNEH spokesperson said.

The Port Stephens family cluster now includes seven people including a man in his 60s (the first case announced on July 21), a man in his 30s, two children aged under 10 and 2 (announced July 23), a woman in her 30s and a woman in her 60s (announced July 29).

The man in his 30s and the two children are close contacts of the man in his 60s. The two women are close contacts of the man in his 30s and have been in isolation for the entire time they have been infectious.

All the Port Stephens cases have been linked to the Wetherill Park Thai Rock cluster.

The second confirmed case announced by HNEH on July 30 is a man in his 40s who is a returned overseas traveller.

The man is a resident of the Hunter New England region, however, has remained in hotel quarantine in Sydney since his return.

It comes as NSW Health confirmed there had been 18 new cases diagnosed in the state between 8pm on July 28 and 8pm on July 29.

In the Hunter New England area there are currently eight confirmed COVID cases.