Eaglehawk Dive Centre

Waterfall Bay Caves & Canyons

Waterfall Bay      

Geologically, the Tasman Peninsula region is primarily mudstone/sandstone which in some areas has been extensively eroded to offer huge caves, tunnels and canyons, particularly in Waterfall Bay, an area well known for its sea caves. The largest, Cathedral Cave, which is the largest sea cave system in Australia, consists of a massive entrance (maximum water depth 21m), extending back into smaller caverns with narrow tunnels and cross passages, often with large schools of fish near the entrances. The walls are covered with brightly coloured invertebrates normally found in much deeper water. As you can imagine, this cave offers spectacular diving from a photographic aspect. There are several other smaller cave complexes, including Dog Leg Cave and Horse-shoe Cave. The caves are for experienced divers with excellent buoyancy control, and diving in them is only possible when there is little swell.

Take look at a video of some highlights of diving Cathedral Cave, or a tour through the Cathedral Cave system including a map.


The canyons of the Patersons Arch area offer all the varied intertebrate life, great swim-throughs and walls of the caves, but without the rock ceiling. Patersons Arch can be dived by anyone with good diving skills and reasonable buoyancy control, although we do not normally recommend it for novice divers.

There are many other sites in Waterfall Bay, including some excellent walls to 18m, swim-throughs and bommies, all of which are suitable for divers of all levels of experience.

There is also an area at the back of Waterfall Bay where Weedy Seadragons are commonly seen - this is also an area suitable for divers of all levels of experience.   Watch some video of the Weedy Seadragons.


Watch some video of the caves at Waterfall Bay

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