Gulf Harbour Marina sits on the south side of the Whangaparāoa Peninsula, approximately 4 km from the peninsula's end, opening directly onto the Hauraki Gulf north of Auckland.

It is one of New Zealand's largest marinas, home to over 1,000 vessels ranging from 10. 5 m to 55 m, with berths available for rent or purchase.

Facilities include a self-service fuel dock offering petrol and diesel, a haul-out travel lift capable of handling vessels up to 100 tonnes and 7. 8 m beam, a sealed hardstand, and a dry-stack storage service for vessels up to 10 m.

On-site services extend to boat building, rigging, and maintenance businesses. The marina uses a digital app-based access system for pier gates, ablution blocks, and car park entry.

Recycling stations and dedicated disposal points for hazardous materials are located throughout the grounds.

The surrounding waters are noted for wildlife, with dolphins, little blue penguins, whales, seals, and stingrays regularly observed in and around the marina channel and Hauraki Gulf.