What Separates Australia from Africa? The Indian Ocean—And Why the Question Matters

There is no single named "strait" or "sea" separating Australia from Africa. The Indian Ocean itself—Earth's third-largest ocean, 70.5M km²—lies between them.

The Direct Distance

• Closest points: Cape Range (Western Australia) to Cape Guardafui (Somalia/Horn of Africa) ≈ 5,300 km (3,300 mi)
• Perth to Mogadishu: ~6,100 km
• Perth to Cape Town: ~7,800 km (southwest diagonal)

What Lies Between: Indian Ocean Structure

Why No Named "Sea" Between Them?

The International Hydrographic Organization (IHO) defines seas as subdivisions of oceans bounded by land. Between Australia and Africa, there's no intervening landmass—just open ocean. Contrast: Timor Sea (Australia–Timor-Leste), Arafura Sea (Australia–New Guinea), Mozambique Channel (Africa–Madagascar).

Historical and Modern Connections

• Trade winds drove the Indian Ocean trade network (monsoon-driven) linking East Africa, Arabia, India, Southeast Asia for 2,000+ years.
• Submarine cables (SAFE, METISS, EASSy) now carry 99% of Africa–Australia–Asia data traffic.
• Search for MH370 (2014) focused on southern Indian Ocean—highlighted how little we know of this abyssal plain.

Bottom Line

The Indian Ocean doesn't just "separate" Australia and Africa—it connects them through climate systems (Indian Ocean Dipole), biogeography (shared marine taxa), and the deep-time history of Gondwana. The distance is vast; the relationship is deep.