Gulf Harbour is a suburb development some 4 km from the end of the Whangaparāoa Peninsula, and 7 km from Whangaparaoa Town Centre, towards the northern end of Auckland, New Zealand. It has one of the country's largest marinas, and had, until 2023, one of the country's top golf courses and used to be regarded as a retreat for Auckland's well-off. The site is sometimes also known as Hobbs Bay and was sold in the early seventies by landowners, the Hobbs family, who still retain some of the coastal area including the Hobbs Bay beach.