Ostend is a settlement on Waiheke Island in northern New Zealand. It is the home to the island's only supermarket (Woolworths) and is also known as the industrial area of the island. The bay at Ostend is known as Putiki Bay where a Causeway was built to enable vehicles access across the water. Today it is used by boatsmen who moor their boats on the beach as it is easy to access from the mainland marina at Half Moon Bay