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Neptune Islands

Verified2026-09-30 checkedPelagic

The only place in Australia licensed for white shark cage diving, and the reason is the sea lion colony next door.

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Depth
0–8 m0–26 ft
Difficulty
Beginner
Entry
Boat
Typical current
Moderate
Coordinates
35°14.112′S 136°7.098′E
Activities
Scuba · Snorkelling

The Neptunes sit at the mouth of Spencer Gulf, three hours out from Port Lincoln, and they hold Australia's largest long-nosed fur seal colony — which is why the white sharks are there. Cage diving is the only permitted way in, from a surface cage on hookah air or an ocean-floor cage at about 18 m, and no certification is needed for the surface cage. Sightings are best from May to October. Nothing is baited into the cage: operators use tuna on a rope and are legally barred from feeding, so what you see is a shark deciding to look at you. The swell here is Southern Ocean swell and the crossing is not gentle.

Three hours by boat from Port Lincoln, which is a 50-minute flight from Adelaide. Liveaboard and day trips both run.

Best season

  • ExcellentMay–Aug
  • GoodSep–Oct
  • FairNov–Apr

Conditions

No live conditions for this site yet.

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Sea state and tide

Marine life you may see

  • Great white sharkCarcharodon carchariasCommon
  • Australian sea lionNeophoca cinereaCommon
  • Port Jackson sharkHeterodontus portusjacksoniSeasonal

From divers

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