Rottnest Island

Rottnest Island is a dive site located close to Perth that features tunnels and limestone caverns covered with sponges, gorgonians, and corals. There are many crevices, huge swim-throughs, and a maze of caves.

When to go

The warm waters of Rottnest Island allow year-round diving, with an average temperature of 18-22C/64-72F. The best visibility is usually from September to November. Humpback whales can be seen in spring, while fall brings gray nurse sharks.

What to see

Rottnest Island is home to such species as lionfish, butterfly cod, nudibranchs, and various other creatures. Other species here are grouper, barracudas, snapper, wobbegongs, blue devilfish, and even leafy sea dragons.