Bass and Flinders

Bass and Flinders sits at the very tip of the Cronulla Peninsula where the Port Hacking River meets the open coast, and it punches well above its depth rating for variety. The reef is shallow — maxing out at 6 m — and the terrain includes rocky reef sloping to a sandy bottom, kelp beds covering the mid-section, and an unusual bonus: a small submerged car wreck that has been colonised over the years into a productive artificial reef and a reliable hiding spot for juvenile fish and invertebrates. It is a compact site that gives you more to look at than the depth alone suggests.

In October, baby Port Jackson sharks gather here in numbers, making it one of the most accessible shark nurseries on the Sydney coast. The sharks are small, entirely docile, and photogenic in the shallow water. Outside that window, night diving is the main draw — the shallow rocky reef comes alive after dark with a completely different cast of species than you encounter during the day.

Visibility is typically 5 m or better when conditions are right. The site is best dived on an incoming or high tide, and the entry and exit are easy — one of the better beginner-friendly shore entries in the Cronulla area. The main inconvenience is the walk back up the hill after the dive with full gear. Boat traffic is minimal compared to sites further into Port Hacking, but a surface float is still good practice if freediving.

The site is also suited to DPV exploration — a scooter opens up the reef beyond the immediate entry area and can take you all the way to fish soup. The site has genuine seasonal appeal beyond the standard summer peak. Port Jackson sharks aggregate at Bass and Flinders from late August through October during their annual breeding season, and the underwater terrain of boulders and kelp provides the kind of complex habitat they favour for egg-laying. Multiple sharks can be present simultaneously on a good winter or early spring dive, and because the site is relatively sheltered compared to the more exposed headlands further south, it is often diveable on days when the better-known Port Jackson shark sites are washed out. Night diving is also productive here — the kelp beds come alive with invertebrate activity after dark and the Pelagic trail covers the site to deeper walls.

Restrooms and a shower are 30 m from the entry point. Abyss Scuba Diving is the closest shop 13 km away.