Cullen Bay Marina is a small, protected marina located close to Darwin's CBD, sitting on Mindil Creek within the residential Cullen Bay precinct. It accommodates over 250 vessels and offers powered berths for boats from 10 to 25 metres.

The marina is an all-tides access facility. Vessel entry is via a tidal lock, operated on the hour from 6am to 11pm daily, with special arrangements available outside those hours.

Skippers should contact the Cullen Bay Lockmaster on VHF Channel 11 before arrival. Maximum vessel dimensions are 25m LOA, 8. 5m beam, and 2. 5m–3m draft. A self-service fuel dock is located just outside the lock.

Entry requirements include Aquatic Biosecurity clearance, third-party liability insurance, and a prior berth booking. The broader marina precinct includes restaurants, a bar, café, gym, laundry, and foreshore lawns popular for events and sunset picnics.