Bay of Islands Marina, located at Port Opua (35°18'45. 9″S, 174°07'19. 4″E), is a full-service marina offering 420 berths for vessels ranging from 10. 5 to 40 metres, including superyachts.

It serves as a primary port of entry for vessels arriving from the Pacific, with dedicated customs and quarantine berths on the outer breakwater.

The marina is home to an award-winning boatyard precinct with more than 35 on-site marine trade partners covering everything from boat building and mechanical work to painting and refrigeration.

Shore power, a 24-hour diesel fuel dock, free pump-out facilities, and 20 dedicated in-water work berths round out the practical offerings. The marina can be reached on VHF Channel 73.