Bay of Saint-Augustin

23°30′15″S 43°41′00″E / 23.50417°S 43.68333°E / -23.50417; 43.68333River sourcesOnilahy RiverOcean/sea sourcesIndian OceanBasin countriesMadagascarSettlementsAnakao, Saint-Augustin

The Bay of Saint-Augustin is located on the southwestern coast of Madagascar in the region of Atsimo-Andrefana at the Mozambique Channel. This bay is the mouth of the Onilahy River at a distance of 35 kilometres south of Toliara.