Some of Australia's best diving is at the end of a long ride: the Yongala from Townsville, the outer Great Barrier Reef from Cairns, the Abrolhos from Geraldton. This list ranks day-trip sites by the recorded boat time from the usual departure point.
Updated daily from the directory. 25 sites listed.

1. Eyre Peninsula · SA
Boat ride: 165 min · The only great white cage diving in Australia, from Port Lincoln.

2. Yorke Peninsula · SA
Boat ride: 80 min · Sheer walls, deep ledges and boulder crevices with leafy seadragons and catsharks at one of SA's most remote island sites.

3. Yorke Peninsula · SA
Boat ride: 75 min · Remote island with 150 m cliffs, walls and drifts to 50 m and Shark Cove's undercut ledge and tunnel through North Point.

4. Eyre Peninsula · SA
Boat ride: 60 min · Playful, endangered Australian sea lions spinning around snorkellers in a clear, shallow cove, plus a 30 m-to-4 m pinnacle for divers.
5. Eyre Peninsula · SA
Boat ride: 60 min · Uncrowded shallow-water swims with Australian sea lions in the Sir Joseph Banks Group.

6. Eyre Peninsula · SA
Boat ride: 60 min · Big blue groper on every dive at the remote tip of Coffin Bay Peninsula – reached by a classic 4WD track.

7. Eyre Peninsula · SA
Boat ride: 55 min · A shallow reef honeycombed with caves and crevices full of gorgonians, soft corals, blue devils and boarfish in the Sir Joseph Banks Group.

8. Eyre Peninsula · SA
Boat ride: 50 min · An alternative sea lion swim venue in Lincoln National Park, with boulder bommies and swim-throughs on its south-side reefs.
9. Yorke Peninsula · SA
Boat ride: 50 min · An offshore pinnacle rising from 35 m to 12 m near Althorpe Island, packed with fish and gorgonians.

10. Eyre Peninsula · SA
Boat ride: 50 min · The historic white shark cage-diving and filming site of the 1970s, now a protected pinniped breeding colony with no recreational diving.

11. Eyre Peninsula · SA
Boat ride: 50 min · A seal colony dive with colourful bommies off the south-west tip, in the tidal channels of Thorny Passage.

12. Eyre Peninsula · SA
Boat ride: 50 min · A sheltered wilderness cove with a granite fringe and fish nursery, in one of Lincoln National Park's most beautiful settings.

13. Yorke Peninsula · SA
Boat ride: 50 min · The youngest wreck on the Investigator Strait trail, a 1982 steel fishing boat half-buried under Althorpe Island's exposed south-west cliffs.

14. Eyre Peninsula · SA
Boat ride: 50 min · The largest island of the Sir Joseph Banks Group, with clear water, rich fish life on south-east reefs and a sheltered jetty – a base for island diving off Tumby Bay.

15. Eyre Peninsula · SA
Boat ride: 50 min · Rarely dived walls and gutters to 20 m in clear Bight water off Elliston.

16. Yorke Peninsula · SA
Boat ride: 45 min · Remote island with 50+ sites, 20 m walls, seal colonies, big blue groper and historic wrecks at the mouth of Spencer Gulf.

17. Yorke Peninsula · SA
Boat ride: 45 min · A 1911 Sydney-built hopper barge scuttled in 1984 as a fish haven beside the protected Zanoni – no permit required and plenty of snapper and mulloway.

18. Yorke Peninsula · SA
Boat ride: 45 min · A narrow cove where more than 150 diver-habituated seals play around divers, with two huge friendly blue groper.

19. Yorke Peninsula · SA
Boat ride: 45 min · Boiler, engine, anchor and windlass of a 1919 zinc-laden steamer that took 11 lives, lying in a reef gully on remote Althorpe Island.

20. Eyre Peninsula · SA
Boat ride: 45 min · Boulder field at 12 m riddled with small caves, swim-throughs and gutters in Thorny Passage.

21. Yorke Peninsula · SA
Boat ride: 45 min · One of Australia's best-preserved 19th-century composite sailing ships, lying intact on her side in 18 m with masts, rudder and bowsprit still recognisable.

22. Eyre Peninsula · SA
Boat ride: 40 min · An upright 134.6 m WWII Liberty ship in 11-13 m with her bridge 2 m below the surface – one of South Australia's best wreck dives.

23. Adelaide Metro · SA
Boat ride: 35 min · A rarely visited, broken-up 1879 Port Adelaide-built vessel far offshore, with its bow still recognisable.

24. Whyalla & Upper Spencer Gulf · SA
Boat ride: 35 min · Fish-attracting tyre reefs in 18 m off Point Lowly – a slack-water dive for artificial-reef enthusiasts.

25. Whyalla & Upper Spencer Gulf · SA
Boat ride: 30 min · Eastern end of the cuttlefish aggregation with deeper ledges and fewer crowds, below the 1883 Point Lowly lighthouse.
Usually yes: distance from the coast means clearer water, healthier reef and bigger animals. Take seasickness precautions and expect weather cancellations on exposed runs.
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