Thirteenth Beach, Beach in Barwon Heads, Australia.

Thirteenth Beach is a sandy coastal stretch in Barwon Heads that extends several kilometers along the shoreline. The beach features rolling dunes that create a natural boundary between the water and the surrounding inland areas.

The name comes from the beach's position beside the thirteenth hole of the Barwon Heads Golf Course, west of Barwon Heads. The course lies inland of the sand, and the hole gave the 4.5-kilometre stretch its everyday name, "13th". Black Rock marks the western end of the beach.

The beach's name comes from its position beside the thirteenth hole of the Barwon Heads Golf Course. The Thirteenth Beach Barwon Heads Surf Lifesaving Club patrols voluntarily on summer weekends, while paid lifeguards cover weekdays in summer.

The surf is dangerous, with diverse breaks along 4.5 kilometres of coast; the beach is patrolled by volunteers on summer weekends and by paid lifeguards on weekdays in summer. Swim between the flags near the Thirteenth Beach Barwon Heads Surf Lifesaving Club and check conditions before entering the water. Black Rock marks the western end of the beach.

The dune system here acts as a natural barrier that protects the inland from ocean forces. This vegetated environment is part of a larger ecosystem that the beach itself supports.