Whenuapai is a suburb and aerodrome located in northwestern Auckland, in the North Island of New Zealand. It is located on the shore of the Upper Waitematā Harbour, 15 kilometres to the northwest of Auckland's city centre. It is one of the landing points for the Southern Cross telecommunications Cables.

The Upper Waitematā Harbour is an estuary of the Waitematā Harbour in the Auckland Region of New Zealand. It flows south-east from the town of Riverhead, and was historically the border between Waitakere City and North Shore City in Auckland.