Kawau Island is in the Hauraki Gulf, close to the north-eastern coast of the North Island of New Zealand. At its closest point it lies 1.4 km (0.87 mi) off the coast of the Northland Peninsula, just south of Tāwharanui Peninsula, and about 8 km (5.0 mi) by sea journey from Sandspit Wharf, and shelters Kawau Bay to the north-east of Warkworth. It is 40 km (25 mi) north of Auckland. Mansion House in the Kawau Island Historic Reserve is an important historic tourist attraction. Almost every property on the Island relies on direct access to the sea. There are only two short roads serving settlements at Schoolhouse Bay and South Cove, and most residents have private wharves for access to their front door steps.

Sir George Grey, KCB was a British soldier, explorer, colonial administrator and writer. He served in a succession of governing positions: Governor of South Australia, twice Governor of New Zealand, Governor of Cape Colony, and the 11th premier of New Zealand. He played a key role in the colonisation of New Zealand, and both the purchase and annexation of Māori land.