The Ombai Strait is the strait which separates the Alor Archipelago from the islands of Wetar, Atauro, and Timor in the Lesser Sunda Islands. Wetar is part of the Maluku Province of Indonesia, the Alor Archipelago and the western part of Timor are part of the province of East Nusa Tenggara, Indonesia, while Atauro and the eastern part of Timor comprise the nation of East Timor.