||This article does not cite any sources. (December 2009)
The Chatham Islands from space. Petre Bay is the large indentation in the left of the main island.
Petre Bay is a large bay which comprises about half of the west coast of Chatham Island/Rekohu, the largest island in New Zealand's Chatham Islands archipelago. It is some 20 kilometres (12 mi) in extent, and contains the far smaller Waitangi Bay, where the island group's largest settlement, Waitangi is located.
Coordinates: 43°52′S 176°33′W / 43.867°S 176.550°W