The ecoregion covers an area of 90,500 square kilometers (34,900 square miles) bounded by the Indian Ocean to the west, the Pilbara shrublands to the northeast, the Western Australian Mulga shrublands to the east, and the Southwest Australia savanna to the south.
The ecoregion covers an area of 90,500 square kilometers (34,900 square miles) from the bounded by the Indian Ocean to the west from the Peron Peninsula in Shark Bay up to the North West Cape. The Pilbara shrublands lie to the northeast, the Western Australian Mulga shrublands to the east, and the Southwest Australia savanna to the south.