Spring
Scuba Diving in Australia in October
Leafy seadragon breeding, returning whales, and warming water on every coast.
October brings warming water nationwide and is one of the better months for South Australian jetty diving, with leafy seadragon males carrying eggs.
Humpbacks are still moving south with calves along the east coast, and the Great Barrier Reef is heading toward its coral spawning.
It is a good month for temperate photography — spring productivity brings out invertebrate life before summer plankton reduces visibility.
Ranked guide: the best dive sites in Australia in October →
Green TurtleThe most commonly encountered turtle on Australian reefs, and a reliable sight at Cook Island and the southern Great Barrier Reef.
Grey Nurse SharkAustralia's most recognisable dive shark — ragged teeth, entirely harmless, and critically endangered on the east coast.
Humpback WhaleHeard far more often than seen — the soundtrack to winter diving on both Australian coasts.
Leafy SeadragonSouth Australia's emblem and the most elaborately camouflaged fish in the world.
NudibranchsSea slugs of absurd colour and variety — the reason temperate Australian macro diving has a global reputation.Spotted HandfishA critically endangered Tasmanian fish that walks on its fins and lives almost nowhere.
Weedy SeadragonThe leafy's more widespread cousin — the signature animal of Sydney and Victorian shore diving.Businesses documented at the sites where this month's peak species are found.
Manta Lodge & Scuba CentrePoint LookoutSSINorth Stradbroke Island's only full-service scuba centre and an SSI Instructor Training Center, with two boats, on-site lodging, and technical and freediving training.BoatCoursesAdvancedProTechHireSource-backed profile
Blue Bay DiversBrunswick HeadsA Brunswick Heads charter running the 8.5-metre catamaran Bay Warrior to Julian Rocks and less-visited Byron sites such as Windarra Banks and the Cape Pinnacle.BoatSource-backed profile
Pro Dive CairnsCairnsPADIA PADI 5 Star Career Development Centre operating since 1983, pairing a Cairns training centre with two deep heated pools with three-day outer reef liveaboard trips.BoatCoursesAdvancedProNitroxPoolSource-backed profile
Divers DenCairnsPADICairns' longest-established dive company (founded 1974), a PADI Career Development Centre and Eco Centre running day trips and the OceanQuest reef-based liveaboard.BoatCoursesAdvancedProNitroxPoolSource-backed profile
Dreamtime Dive & SnorkelCairnsCairns' Indigenous-guided reef day trip, run by Reef Magic Cruises, visiting two outer reef sites with optional introductory and certified dives.BoatCoursesHireSource-backed profile
Coral Sea DreamingCairnsAn 18-metre sailing ketch taking up to 12 guests on overnight Cairns reef trips, with all dives guided and one of the few introductory night-dive licences.BoatHireSource-backed profile
South West Rocks Dive CentreSouth West RocksA family-run South West Rocks operation that has run daily charters to Fish Rock since 1980, including the 125-metre cave traverse.BoatCoursesAdvancedNitroxHireStaySource-backed profile
Fish Rock Dive CentrePADIA South West Rocks operation running regular Fish Rock and Fish Rock Cave trips from a 12-metre purpose-built vessel, with Nitrox supplied and PADI training.BoatCoursesAdvancedNitroxHireSource-backed profile
Wolf Rock Dive CentrePADIA Rainbow Beach operation specialising in Wolf Rock, an advanced offshore pinnacle site known for grey nurse sharks.BoatCoursesAdvancedProNitroxHireSource-backed profileOther Marine Life to See in October
Australian & New Zealand Fur SealsFast, acrobatic and endlessly curious — the highlight of Montague Island, Jervis Bay and Port Phillip.Australian Sea LionEndangered, endemic, and among the most genuinely playful animals a diver can meet.Eastern Blue GroperNew South Wales' state fish — large, inquisitive and often the first thing to greet a Sydney shore diver.Giant Kelp ForestTasmania's underwater forests — dramatically diminished, and worth seeing while they remain.Great White SharkEncountered in Australia from a cage at the Neptune Islands — wildlife tourism rather than scuba diving.Loggerhead TurtleHeavier-headed and less common than the green turtle, with a nationally significant nesting population near Bundaberg.Manta RayReef mantas at cleaning stations — Lady Elliot and Ningaloo are the most reliable encounters in Australia.Potato CodEnormous, docile groupers habituated to divers at Cod Hole on the Ribbon Reefs.Queensland GroperThe largest reef-dwelling bony fish in the world, and a defining feature of the SS Yongala.
Green Turtle
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Grey Nurse Shark
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possible good peak
Humpback Whale
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possible good peak
Leafy Seadragon
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possible good peak
