Dive sites · 2026 guide
Deep dives reward preparation: short no-decompression times, more narcosis and less margin for error. These sites spend much of the dive past 25 metres.
Take the Deep specialty first, plan gas conservatively, and consider Nitrox for longer bottom times at moderate depths.
1Port Phillip Heads, Victoria
Walls starting at 12 metres and continuing beyond 90 — the terrain behind Victoria's technical culture.
That range makes the region relevant simultaneously to recreational wall diving, deep training, decompression diving, Trimix and full technical diving. Very few Australian sites serve that entire spectrum.
Look for: Australian & New Zealand Fur Seals
Full Port Phillip Heads Walls guide →
2Mount Gambier, South Australia
A limestone sinkhole with water so clear the experience is closer to flying than diving.
The visibility is the point. With clarity that can exceed anything in the ocean, divers hanging mid-water can see the full dimensions of the chamber, and shafts of sunlight through the entrance produce the images the site is known for.
Look for: Very little — these are oligotrophic freshwater systems with minimal life, which is part of why the water is so clear.
3Geelong & Bellarine Peninsula, Victoria
Numerous vessels deliberately scuttled outside Port Phillip Bay across a wide depth range.
Different wrecks lie at different depths, ranging from accessible recreational profiles to depths that require Trimix and full decompression planning.
Look for: sponge and soft coral colonisation, temperate reef fish, crayfish, schooling baitfish, seals occasionally
4Tasman Peninsula & Eaglehawk Neck, Tasmania
A steamer lost in 1915, lying around 42 metres off the Tasman Peninsula.
The wreck is largely intact and well preserved in the cold water, and it is among the most significant wreck dives in Tasmania.
Look for: sponge and soft coral colonisation, butterfly perch, crayfish, temperate reef fish, occasional seals
Eaglehawk Dive Centre
5Port Phillip Heads, Victoria
Victoria's signature wall — sponge-covered, vertical, and continuing well past recreational depth.
The shallower sections are within reach of competent recreational divers on slack water; the deeper sections are a genuine technical undertaking.
Look for: Australian & New Zealand Fur Seals
Full Lonsdale Wall guide →Sites are chosen from our dive-site database and ordered by how well documented they are: flagship status, the number of operators we have confirmed dive there, and the marine life recorded. Nobody pays to be listed.
No. Listings and order come from our research only. Businesses can ask us to correct their details, but not to change their position.
It is generated from the directory's latest research, checked in 2026. Conditions, operators and seasons change — confirm details with the operator before you book.