Winter
Diving Australia in July
Peak cuttlefish, peak minke whales, peak grey nurse — the coldest water and the best events.
July is peak season for several of Australia's defining underwater events simultaneously, and the coldest month in the water almost everywhere.
The Whyalla cuttlefish aggregation is at its densest. Minke whale interactions continue on the Ribbon Reefs. Grey nurse shark aggregations are at their strongest on the east coast, and Lady Elliot's mantas are reliable.
Southern diving requires real thermal planning, and winter visibility in Victoria, Tasmania and Jervis Bay is often the best of the year.
WhyallaPeak cuttlefish aggregation — the densest numbers of the year.
CairnsMinke whale season continues; dry-season reef conditions at their most reliable.Bundaberg & Southern Great Barrier ReefManta season at Lady Elliot Island at its strongest.
Jervis BayColdest water but often the clearest, with active seal encounters.
Australian & New Zealand Fur SealsFast, acrobatic and endlessly curious — the highlight of Montague Island, Jervis Bay and Port Phillip.Dwarf Minke WhaleCurious whales that approach snorkellers on the northern Ribbon Reefs each winter — a genuinely rare permitted interaction.
Giant Australian CuttlefishThe world's largest cuttlefish, gathering in tens of thousands at Whyalla each winter.
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.
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.
Manta RayReef mantas at cleaning stations — Lady Elliot and Ningaloo are the most reliable encounters in Australia.
Port Jackson SharkA small, harmless, harness-marked shark that gathers in southern NSW winters to breed.
Potato CodEnormous, docile groupers habituated to divers at Cod Hole on the Ribbon Reefs.
Striped Pyjama SquidA tiny, toxic, absurdly striped cuttlefish that buries itself in sand — Edithburgh's signature find.
Whale SharkThe world's largest fish, and at Ningaloo an encounter you snorkel with rather than dive.Also good in July
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 Spider CrabTens of thousands of crabs piling into the shallows of Port Phillip Bay to moult, in one of Victoria's strangest dives.Green TurtleThe most commonly encountered turtle on Australian reefs, and a reliable sight at Cook Island and the southern Great Barrier Reef.Leafy SeadragonSouth Australia's emblem and the most elaborately camouflaged fish in the world.Loggerhead TurtleHeavier-headed and less common than the green turtle, with a nationally significant nesting population near Bundaberg.NudibranchsSea slugs of absurd colour and variety — the reason temperate Australian macro diving has a global reputation.Queensland GroperThe largest reef-dwelling bony fish in the world, and a defining feature of the SS Yongala.Seahorses & PipefishCryptic, slow and protected — jetty piles and sponge gardens are where to look.
Australian & New Zealand Fur Seals
J
F
M
A
M
J
J
A
S
O
N
D
possible good peak
Dwarf Minke Whale
J
F
M
A
M
J
J
A
S
O
N
D
possible good peak
Giant Australian Cuttlefish
J
F
M
A
M
J
J
A
S
O
N
D
possible good peak
Giant Kelp Forest
J
F
M
A
M
J
J
A
S
O
N
D
possible good peak