The seventh victim is the captain of the charter boat Francie which capsized in Kaipara Harbour on Saturday.
The search for one person who is presumed dead and the boat, the Francie, continued on Sunday.
Radio New Zealand reports the men were aged between 31 and 59 and they were a group of friends who liked to go fishing together from time to time.
The missing man was believed to be a Cook Islander.
Police were liaising with families of the victims to support them and officers had been assigned to each of the families to help them.
