The Whangateau Harbour is a natural harbour in New Zealand. It is a sandspit estuary, located on the north-eastern coast of the Auckland Region north-east of Matakana, and empties into the Hauraki Gulf. Due to the harbour's high quality water and dense shellfish beds, the harbour is a popular spot for shellfish gathering.

Ōmaha is a small beach town on Ōmaha Bay in the Auckland Region, in the north of New Zealand. It is located 74.7 km north of central Auckland. It is on a sandspit that adjoins Tāwharanui Peninsula and separates Whangateau Harbour from Ōmaha Bay. The nearest sizeable town is Warkworth which is situated 16.8 km south west of Ōmaha.