Cocos Keeling Islands Australia

Barely on the map but fully in the water, the Cocos (Keeling) Islands are Australia's only true atoll lagoon: palm-fringed islets wrapped around electric-blue shallows and steep outer walls in the Indian Ocean. With only West Island and Home Island inhabited and a strict visitor cap, the vibe stays quiet and the reefs look freshly painted. Expect year-round warm water between 26°C and 29°C, visibility often around 25 m, and easy access to more than 20 mapped dive sites. Manta rays cruise cleaning stations inside the lagoon, while grey reef sharks and dogtooth tuna patrol outer drop-offs. Turtles and dolphins are common companions on snorkel and dive days. The trade-wind season (roughly May to October) is kiteboarding heaven, while calmer months (roughly November to April) make lagoon snorkelling and outer-reef boat dives simpler. Plan ahead: flights are limited, beds are limited, and there is a single dive operator.