Quote (onetrack):
If MH370 actually did go into the Indian Ocean, in the region of the latest search area - then it's highly likely a % of any floating, surviving wreckage will almost certainly, eventually wash up onto the West Australian coast, due to constant prevailing S/Westerly surface winds.
Not necessarily; one, the Leeuwin current off of West Australia runs parallel to the coast and, two the search area extend below 40˚ south latitude which puts in in the Antarctic Circumpolar Current -if it went down there debris might wash up on Tierra del Fuego or the West Antarctic Peninsula