Montague Island

Narooma · New South Wales · Australia

Montague Island sits about nine kilometres off the coast of Narooma on the New South Wales south coast, a windswept granite island that serves as a nature reserve, penguin rookery, and home to one of the most diverse temperate diving ecosystems in Australia. The island is surrounded by rocky reef structures, kelp forests, and sandy channels that create a patchwork of habitats supporting an extraordinary range of marine life, from critically endangered grey nurse sharks to playful Australian fur seals and the elusive weedy sea dragon. It is a site that consistently surprises divers who expect temperate waters to lack the drama and diversity of the tropics. The grey nurse sharks are the signature encounter. These large, slow-moving sharks with their protruding teeth and permanent scowl aggregate in the gutters and swim-throughs on the island's western side, where they hang motionless in the water column, facing into the current. Despite their intimidating appearance, grey nurse sharks are harmless to divers, and the experience of drifting among a group of a dozen or more of these ancient predators at 15 to 20 metres is both humbling and exhilarating. They are critically endangered in eastern Australian waters, and Montague Island is one of their most important aggregation sites, making every encounter a privilege with conservation significance. The fur seal colony on the island's northern end provides a completely different kind of interaction. Young seals are endlessly curious, approaching divers to blow bubbles in their faces, chew on fin straps, and spin in acrobatic spirals. They move with a speed and agility in the water that is almost comical given their ungainly appearance on land. Seal encounters typically happen in shallow water between five and ten metres, making them accessible to divers of all levels and providing long, relaxed interactions that leave everyone grinning. Between the sharks and the seals, the reef itself deserves attention. Weedy sea dragons, one of Australia's most iconic marine species, drift through the kelp forests on the sheltered eastern side, their leaf-like appendages providing perfect camouflage. Blue gropers, impossibly blue and absurdly friendly, follow divers like underwater puppies. Wobbegong sharks lie flat against the rock, their ornate camouflage making them nearly invisible. Cuttlefish hover in midwater, flashing chromatic patterns in response to passing divers. The rocky reef is carpeted in colourful sponges, ascidians, and bryozoans that give temperate Australian waters their distinctive and underappreciated beauty. Montague Island is a two-hour drive south of Canberra and a comfortable day trip from Narooma, with several dive operators offering guided trips to the island year-round, weather permitting. The combination of charismatic megafauna and rich temperate reef ecology makes it one of New South Wales' finest dive destinations.