Cave, Cavern & Sinkhole Dives in Tasmania

From the Mount Gambier sinkholes to the Nullarbor caves and Christmas Island's sea caves. Many sites require cave-diving certification, permits or bookings; the technical notes on each page explain what is needed.

All states QLD NSW VIC TAS SA WA NT Territories

34 sites

Sort:Default Most dived Deepest Shallowest A–Z

ReefMax 23 m

27B (Bicheno)

Tasmania East Coast · TAS

A moderate-depth wall with an overhang and a large cave, close to the ramp.

Advanced Open WaterIntermediate

Shore/Rock PlatformMax 15 mShore

Binalong Bay / Skeleton Bay

Tasmania North-East · TAS

A skull-shaped granite rock with swim-throughs and big banded morwong in a sheltered Bay of Fires cove.

Open WaterIntermediate

ReefMax 20 m

Bird Rock (Bicheno)

Tasmania East Coast · TAS

Three named features - The Elbow, T Cave and the anemone-lined Ballroom - and some of the best nudibranch hunting at…

Advanced Open WaterIntermediate

ReefMax 6 mShore

Blowhole Reef (King Island)

King Island · TAS

Easy shallow sandstone ledges and swim-throughs with an old anchor.

Open WaterBeginner

Shore/Rock PlatformMax 12 mShore

Buxton Point (Swansea)

Tasmania East Coast · TAS

Fissures, a 50 m cave and good fish habitat on the Great Oyster Bay coast.

Open WaterIntermediate

WallMax 40 m

Cape Sonnerat (Schouten Island)

Tasmania East Coast · TAS

Rated 10/10 by the regional guide: granite caverns at 30-40 m lit by a flue-like opening, with clouds of butterfly…

Deep/Advanced + experienceExpert/Technical

Cave/CavernMax 21 m

Cathedral Cave

Tasman Peninsula · TAS

Australia's largest sea-cave system with named passages (Catacombs, Revelation Bend, Skull Cave, Devil's Tonsils);…

Advanced Open WaterAdvanced

IslandMax 15 m

Chimney Corner (Three Hummock Island)

Tasmania North & North-West · TAS

Rare granite swim-throughs on a remote Hunter Group island.

Advanced Open WaterAdvanced

WallMax 40 m

Deep Glen Bay North Wall

Tasman Peninsula · TAS

Colourful sponge and sea-whip wall that is the fallback when the Sisters are blown out, with seals and seadragons.

Deep/Advanced + experienceIntermediate

WallMax 17 m

Fossil Cliffs (Maria Island)

Tasmania East Coast · TAS

A 20 m-long swim-through in a fossil-rich limestone terrace below Maria Island's famous Fossil Cliffs.

Open WaterIntermediate

Shore/Rock PlatformMax 10 mShore

Glory Hole (Sisters Cave)

Tasmania North & North-West · TAS

Quartzite caves, a boulder maze and a bullseye-filled sea cave - Sisters Beach's shore dive.

Open WaterIntermediate

IslandMax 30 m

Ile des Phoques

Tasmania East Coast · TAS

Rated among Tasmania's best dives: a colony of hundreds of playful fur seals and a well-lit cave through the island.

Advanced Open WaterAdvanced

Cave/CavernDepth not publishedShore

Kubla Khan Cave Sump (Mole Creek)

Tasmania Freshwater & Caves · TAS

Site of Tasmania's first cave dive (1959) - a 1.1 km zero-visibility sump, for expedition cave divers only.

Cave/Cavern certificationExpert/Technical

ReefMax 9 mShore

Lookout Bluff – The Split

Tasman Peninsula · TAS

A shallow crevice-and-cave reef at the north end of Waterfall Bay, ideal for long, easy dives.

Open WaterBeginner

WallMax 33 m

Magic Garden (Bicheno)

Tasmania East Coast · TAS

A full-height granite wall with an undercut cave system and tunnels lined with delicate invertebrates.

Deep/Advanced + experienceAdvanced

ReefMax 25 m

Monument Bay

Tasman Peninsula · TAS

Sloping reef with caves and excellent visibility beside Cape Hauy; good macro photography.

Advanced Open WaterIntermediate

Pinnacle/BommieMax 40 m

Mount Everest (Bicheno)

Tasmania East Coast · TAS

A mound rising from 40 m to 5 m - a whole vertical profile in one dive and a colourful safety stop after The Castle.

Deep/Advanced + experienceAdvanced

ReefMax 18 m

Muirs Rock

Tasmania East Coast · TAS

A ring of granite boulders with an amphitheatre and swim-throughs lined with zoanthids - the best mid-depth dive at…

Open WaterIntermediate

Cave/CavernMax 22 m

Patersons Arch

Tasman Peninsula · TAS

Big daylight swim-through arches lined with anemones – cave scenery without the commitment.

Advanced Open WaterIntermediate

IslandMax 15 m

Penguin Island (Adventure Bay)

Bruny Island & D'Entrecasteaux Channel · TAS

Steep reef and shallow sea caves under Fluted Cape, a short hop from the Adventure Bay ramp.

Open WaterBeginner

ReefMax 12 mShore

Picnic Rocks (Deep Creek)

Tasmania North-East · TAS

A 500 m maze of granite bommies, overhangs and caves beside the Deep Creek campground.

Open WaterIntermediate

ReefMax 15 m

Point Geographe (Schouten Island)

Tasmania East Coast · TAS

Shallow granite mazes and swim-throughs with huge banded morwong and often excellent visibility.

Open WaterIntermediate

ReefMax 15 m

Point Puer

Tasman Peninsula · TAS

Sheltered kelp slope and small caves off the convict boys' prison, opposite the Isle of the Dead.

Open WaterBeginner

ReefMax 12 m

Sandstone Bluff (Schouten Island)

Tasmania East Coast · TAS

Sandstone ledges and a large swim-through at 10 m in the shelter of Schouten Island's cliffs.

Open WaterIntermediate

IslandMax 18 m

South Brig Rock (Grassy)

King Island · TAS

Sunken outcrops, swim-throughs and big crayfish off Grassy, diveable in westerlies.

Open WaterIntermediate

ReefMax 15 m

Stumpys Ballroom (Stumpys Bay)

Tasmania North-East · TAS

A swim-through 'ballroom' in sheltered granite reefs off a Mount William National Park beach.

Open WaterIntermediate

Shore/Rock PlatformMax 20 mShore

Tasman Arch & Blowhole Reef

Tasman Peninsula · TAS

Shore diving on the underwater continuation of the Blowhole–Tasman Arch–Devils Kitchen coastline.

Advanced Open WaterIntermediate

Cave/CavernMax 40 m

The Castle (Bicheno)

Tasmania East Coast · TAS

A 30 m tunnel between two granite boulders at 25 m, packed with crayfish and lined with sea whips and zoanthids.

Deep/Advanced + experienceAdvanced

ReefMax 15 m

Top Slip Point (North Bruny)

Bruny Island & D'Entrecasteaux Channel · TAS

Shallow, crumbly cliffs full of little caves lined with zoanthids and jewel anemones – a macro photographer's site.

Open WaterBeginner

Shore/Rock PlatformMax 15 mShore

Trousers Point (Flinders Island)

Flinders Island & Furneaux Group · TAS

A rare limestone reef with swim-throughs beneath the Strzelecki Peaks.

Open WaterBeginner

Pinnacle/BommieMax 40 mArea view

Twin Peaks (Sundial Caves)

Tasman Peninsula · TAS

Twin spires with a 35 m swim-through, a cave maze and deep sponge and gorgonian gardens.

Deep/Advanced + experienceAdvanced

WallMax 25 m

Waterfall Bay Wall

Tasman Peninsula · TAS

Colour-drenched dolerite walls and canyons in the most sheltered bay on the peninsula; suits every level from new Open…

Advanced Open WaterIntermediate

Cave/CavernMax 15 mShore

Waterfall Cave

Tasman Peninsula · TAS

A short daylight loop cave under the Waterfall Bay falls where sevengill sharks are sometimes found resting.

Open WaterIntermediate

WallMax 20 m

West Cove South-East Point (Deal Island)

Kent Group · TAS

A steep, zoned slope from crayweed to sponges with a long fish list, in Murray Pass.

Advanced Open WaterIntermediate