Australia

Best overall months to dive: Jun–Oct

Australia's coverage separates fourteen dive products that should not share one generic season. Tropical options run from Cairns day boats to the Ribbon Reefs, Osprey, Rowley Shoals and Ningaloo. Temperate choices now include Sydney shore and shark diving, Tasmania's cold-water sponge and kelp habitats, Fleurieu Peninsula seadragons, Lord Howe's mixed fauna, winter grey nurse sharks at Julian Rocks, white-shark cages off Port Lincoln and Whyalla's cuttlefish aggregation. Yongala remains a protected advanced wreck, while the southern Great Barrier Reef islands are cooler and transfer-heavy. Environmental condition and wildlife access are stated region by region, including current closures.

Dive regions

Byron Bay & Julian Rocks

$ · Land based, Day trip

Best: May–Sep

Cairns & Outer Great Barrier Reef

$–$$ · Day trip, Liveaboard, Land based

Best: Jun–Oct

Fleurieu Peninsula

$ · Land based, Day trip, Shore dive

Best: Jan, Feb, Mar, Apr, Nov, Dec

Lord Howe Island

$$–$$$ · Land based, Day trip, Shore dive

Best: Jan, Feb, Mar, Apr, Nov, Dec

Ningaloo Reef

$–$$ · Land based, Day trip, Shore dive

Best: Apr–Jul

Osprey Reef & Coral Sea

$$–$$$ · Liveaboard

Best: Aug–Nov

Port Lincoln & Neptune Islands

$–$$$ · Day trip, Liveaboard, Land based

Best: Apr–Oct

Ribbon Reefs & Cod Hole

$$$ · Liveaboard

Best: Jun–Oct

Rowley Shoals

$$$ · Liveaboard

Best: Oct–Nov

Southern Great Barrier Reef

$$–$$$ · Land based, Day trip

Best: May–Sep

SS Yongala & Townsville

$–$$ · Day trip, Land based, Liveaboard

Best: Jun–Oct

Sydney

$ · Land based, Day trip, Shore dive

Best: Apr, May, Jun, Sep, Oct, Nov

Tasmania — East & Southeast

$–$$ · Land based, Day trip, Shore dive

Best: Apr–Aug

Whyalla & Cuttlefish Coast

$ · Land based, Shore dive, Day trip

Best: Jun–Jul