The Open Bay Islands are located in South Westland, off the south-west coast of the South Island of New Zealand. They consist of two main islands, Taumaka and Popotai, plus several smaller islets and rocks. They lie approximately 5 km (3.1 mi) offshore from the Okuru River mouth, near Haast, and are owned by the West Coast branch Māori iwi Ngāi Tahu known as Poutini Ngāi Tahu.