NSW has diagnosed 21 new cases of COVID-19 overnight while Victoria has recorded 627 more cases and another eight people have died.

The 21 new cases recorded in the 24 hours to 8pm Thursday night brings the total number of cases in NSW to 3,567. One previously reported case has been excluded.

There were 25,318 tests reported in the 24-hour reporting period, compared with 27,147 in the previous 24 hours.

Of the 21 new cases there are two are linked to the funeral gatherings cluster; three are associated with the Our Lady of Lebanon cluster and two are associated with the Thai Rock Wetherill Park cluster.

Six new cases are associated with The Apollo restaurant in Potts Point while two cases are associated with the Mounties Club.

Two are returned travellers in hotel quarantine; one case was acquired in Victoria, two cases are under investigation and one case is linked to a known case that is under investigation.

Based on new information, NSW Health has revised the times infectious cases attended the Mounties at 101 Meadows Road, Mt Pritchard.

Anyone who attended the club during Wednesday July 22 from 7pm to midnight; Thursday July 23 from midnight to 3am and 8.30pm to midnight; Friday July 24 from midnight to 3am, 11am to 3:30pm and 7pm to midnight; and Saturday July 25 from midnight to 3am; must isolate.

They should get tested regardless of symptoms, and stay isolated for a full 14 days even if they test negative. If symptoms develop, get tested again.

There are now 94 cases associated with Thai Rock Wetherill Park, 57 cases associated with the Crossroads Hotel cluster, eight cases associated with Batemans Bay Soldiers Club, and 23 associated with the funeral events and three associated with Mounties in Mount Pritchard.

There are 19 cases associated with the Potts Point cluster.