Deep & Technical Dives in South Australia

Dives beyond recreational limits or needing advanced training: deep wrecks, walls and caves. Technical notes cover gas, decompression and penetration considerations where known.

All states QLD NSW VIC TAS SA WA NT Territories

27 sites

Sort:Default Most dived Deepest Shallowest A–Z

Sinkhole/CenoteMax 124 mShore

The Shaft

Mount Gambier Sinkholes & Caves · SA

A single midday shaft of sunlight falling into a flooded chamber 140 m long – and the birthplace of Australia's…

Cave/Cavern certificationExpert/Technical

Sinkhole/CenoteMax 110 mShore

Piccaninnie Ponds – The Chasm

Mount Gambier Sinkholes & Caves · SA

Hanging over a 100 m+ spring-fed slot in 40 m-plus visibility – the signature Mount Gambier image.

Cave/Cavern certificationAdvanced

Freshwater Lake/RiverMax 77 mShore

Blue Lake (Mount Gambier)

Mount Gambier Sinkholes & Caves · SA

A 77 m volcanic crater lake that turns cobalt blue every summer – view only; diving prohibited.

Technical (decompression)Expert/Technical

Sinkhole/CenoteMax 65 mShore

Kilsby Sinkhole

Mount Gambier Sinkholes & Caves · SA

50 m-plus visibility in a cliff-walled sinkhole that Open Water divers can dive with an approved operator; midday light…

Technical (decompression)Intermediate

IslandMax 50 m

Wedge Island

Yorke Peninsula · SA

Remote island with 150 m cliffs, walls and drifts to 50 m and Shark Cove's undercut ledge and tunnel through North…

Technical (decompression)Advanced

Sinkhole/CenoteMax 42 mShore

Little Blue Lake

Mount Gambier Sinkholes & Caves · SA

The easiest-access deep sinkhole in Mount Gambier – roadside parking, stairs and pontoon, and a flat floor at 36 m for…

Cave/Cavern certificationAdvanced

IslandMax 40 m

Althorpe Island

Yorke Peninsula · SA

Remote island with 50+ sites, 20 m walls, seal colonies, big blue groper and historic wrecks at the mouth of Spencer…

Deep/Advanced + experienceAdvanced

WallMax 40 m

Cape Torrens

Kangaroo Island · SA

Deep drop-offs covered in gorgonians and zoanthids beneath South Australia's highest coastal cliffs.

Deep/Advanced + experienceAdvanced

WallMax 40 mArea view

Snapper Point (KI)

Kangaroo Island · SA

Spectacular reef walls with ledges and small caves at 18 m on a current-swept headland full of fish.

Deep/Advanced + experienceAdvanced

WreckMax 39 m

AV Ulonga Wreck

Fleurieu Peninsula & Victor Harbor · SA

A 1910 Murray paddle steamer turned coastal schooner, lost in 1976, sitting upright in 38 m with a Chrysler Valiant…

Technical (decompression)Expert/Technical

Pinnacle/BommieMax 35 mArea view

CD's Bommie

Yorke Peninsula · SA

An offshore pinnacle rising from 35 m to 12 m near Althorpe Island, packed with fish and gorgonians.

Deep/Advanced + experienceAdvanced

Cave/CavernMax 35 mShoreArea view

Three Sisters Cave

Mount Gambier Sinkholes & Caves · SA

An 18 m belayed ladder descent into a 30 m dome chamber, with the infamous 30-40 cm 'flattener' beyond – sidemount only.

Cave/Cavern certificationExpert/Technical

Cave/CavernMax 33 mShoreArea view

Baker's Cave

Mount Gambier Sinkholes & Caves · SA

A 15 m wire ladder down a 1 m solution tube into a large flooded chamber and tunnel to 33 m.

Cave/Cavern certificationExpert/Technical

IslandMax 30 m

Pearson Island

Eyre Peninsula · SA

Granite blocks dropping beyond 30 m in exceptionally clear water at one of SA's most remote islands, with harlequin…

Deep/Advanced + experienceAdvanced

WreckMax 30 m

Stanvac Barges

Adelaide Metro · SA

Three heavily encrusted barges scuttled in 1954 in 28-30 m – among the oldest artificial reefs off Adelaide.

Deep/Advanced + experienceAdvanced

WreckMax 30 m

Stanvac Barges 1 & 2 (small barges)

Adelaide Metro · SA

Two encrusted 1954 barges 33 m apart in 28-30 m, a rarely dived companion to the Saurian.

Deep/Advanced + experienceAdvanced

Cave/CavernMax 30 mShore

Tank Cave

Mount Gambier Sinkholes & Caves · SA

More than 7 km of shallow, lined maze passage – Australia's premier Advanced Cave training and exploration site.

Cave/Cavern certificationExpert/Technical

IslandMax 30 m

The Pages

Kangaroo Island · SA

Pristine walls and big fish schools around sea lion islets in the middle of Backstairs Passage.

Deep/Advanced + experienceAdvanced

Cave/CavernMax 28 mShoreArea view

Nettlebed Cave

Mount Gambier Sinkholes & Caves · SA

A restrictive entrance into 'The Gallery' with archaeological markings, then boulder and clay chambers to 28 m.

Cave/Cavern certificationExpert/Technical

Cave/CavernMax 22 mShore

Engelbrecht Cave – East Extension

Mount Gambier Sinkholes & Caves · SA

Over 400 m of newly discovered, sidemount-only tunnel beneath Mount Gambier, reached through the Rabbit Hole and the…

Cave/Cavern certificationExpert/Technical

WreckMax 15 m

Loch Vennachar Wreck

Kangaroo Island · SA

The scattered iron of a Loch Line clipper that vanished with all hands in 1905, beneath the cliffs at West Bay.

Advanced Open WaterExpert/Technical

Cave/CavernMax 12 mShore

Engelbrecht Cave – West

Mount Gambier Sinkholes & Caves · SA

A 340 m Advanced Cave dive with an air chamber directly beneath Mount Gambier's Jubilee Highway.

Cave/Cavern certificationExpert/Technical

ReefDepth not published

Cape du Couedic – Admirals Arch

Kangaroo Island · SA

A fur seal colony under a sculpted sea arch – a land-based wildlife highlight, not a dive.

Deep/Advanced + experienceExpert/Technical

Cave/CavernDepth not publishedShoreArea view

Hann's Cave

Mount Gambier Sinkholes & Caves · SA

An Advanced Cave site on the CDAA register – closed at present.

Cave/Cavern certificationExpert/Technical

Cave/CavernDepth not publishedShoreArea view

Iddlebiddy Cave

Mount Gambier Sinkholes & Caves · SA

A long, wide single passage with flat ceilings, huge boulders and fragile tessellated clay – 'very easy' for competent…

Cave/Cavern certificationExpert/Technical

Cave/CavernDepth not publishedShoreArea view

Stinging Nettle Cave

Mount Gambier Sinkholes & Caves · SA

A sidemount-only restriction at 10 m that opens into a surprisingly large cave.

Cave/Cavern certificationExpert/Technical

Shore/Rock PlatformDepth not publishedShore

Waitpinga Beach

Fleurieu Peninsula & Victor Harbor · SA

A spectacular surf beach in Newland Head Conservation Park – not suitable for swimming or diving.

Deep/Advanced + experienceExpert/Technical