Diving & Travel Guide to South Australia – Eyre Peninsula

The Eyre Peninsula, a triangular landmass extending into the Great Australian Bight, is South Australia's premier marine adventure destination, offering world-class cage diving with great white sharks, sea lion encounters, and extraordinary coastal diving in the wild Southern Ocean waters. Port Lincoln, the region's main city, is known as Australia's seafood capital and the base for the world-famous great white shark cage diving at the Neptune Islands, where divers observe these apex predators from the safety of purpose-built steel cages in one of the world's most thrilling marine wildlife encounters. The Neptune Islands, located approximately 60 kilometers offshore in the Great Australian Bight, host one of the world's largest great white shark populations, with reliable encounters from May to October. Beyond the sharks, the Eyre Peninsula offers exceptional diving at Coffin Bay with its pristine oyster farms and sea lion colonies, Port Lincoln's rocky reef systems and wreck diving, and the remote islands of the Investigator Group with their dramatic underwater cliffs and gutters. The Lincoln Marine Park protects outstanding marine biodiversity including leafy sea dragons, wobbegong sharks, and diverse reef fish. The region's vast coastline, stretching over 2,000 kilometers, includes some of Australia's most pristine and under-explored diving, with rocky headlands, kelp forests, and offshore islands providing endless opportunities for marine exploration. The coastline is characterized by its rugged limestone cliffs and white sandy beaches, which give way to a submerged world of massive granite boulders and dense kelp forests. These forests are part of the Great Southern Reef and provide a sanctuary for thousands of endemic species, including the incredibly photogenic leafy sea dragon. For those who brave the cooler waters, the rewards are immense, with high-energy sites and a sense of raw, untamed nature that is truly unique to the Southern Ocean.