Foveaux Strait ( FOH-voh; Māori: Te Ara-a-Kiwa, lit. 'the Path of Kiwa') is a strait that separates Stewart Island from the South Island of New Zealand. The width of the strait ranges from about 23 to 53 km (14 to 33 mi), and the depth varies between 18 and 46 m (59 and 151 ft). The earliest known chart of the strait was prepared by American sealer, Owen Folger Smith from a whaleboat of the sealing brig Union in 1804.
The passage was named Foveaux Strait in March 1809, after Joseph Foveaux, the Lieutenant-Governor of New South Wales in Australia. Ferry services across Foveaux Strait began in 1877 and continue to operate regularly between Bluff Harbour and Oban. The strait has been described as "one of the roughest and most unpredictable stretches of water in the world". Severe weather and sea conditions in the strait have contributed to multiple shipwrecks and fatalities. One of these losses was the wreck of the SS Tararua in 1881—the worst maritime disaster for civilian vessels in New Zealand's history, with 131 fatalities. There are currently no formal definitions of the eastern and western boundaries of the strait.
