Fish Rock Cave

Fish Rock Cave, a remarkable underwater sea cave near South West Rocks on the NSW Mid North Coast, is one of Australia’s premier dive sites. This 125-metre-long tunnel, carved through a rocky island, teems with marine life and offers an otherworldly experience for divers and snorkellers alike. The cave’s unique geology and clear waters make it a must-visit for adventurous travellers exploring the Port Macquarie region.

Highlights & What to See

• Swim-through cave system: The main attraction is the tunnel that runs right through Fish Rock Island, with two entrances – the ‘Cathedral’ on the ocean side and a smaller opening on the western side. Inside, shafts of sunlight filter through the cracks, creating a magical atmosphere.
• Grey nurse sharks: The cave is a well-known aggregation site for these gentle, endangered sharks. From late autumn to spring, dozens can be seen resting in the sandy gutters inside the cave – a thrilling sight for divers.
• Rich marine biodiversity: Outside the cave, explore the surrounding boulders and ledges where you’ll find wobbegongs, eagle rays, turtles, and schools of tropical fish. The site is also a hotspot for leafy seadragons and cuttlefish.
• Snorkelling options: While the cave is best experienced by certified divers, snorkellers can enjoy the clear waters around the island, particularly on the western side where the reef is vibrant and accessible.
• South West Rocks township: The nearby coastal village offers a relaxed vibe, with cafes, a historic gaol, and beautiful beaches like Horseshoe Bay – perfect for unwinding after a dive.

Suggested Time to Spend

Most visitors dedicate a full day to Fish Rock Cave, as it’s accessible only by boat from South West Rocks (about a 15-minute ride). A typical trip involves two dives or a dive and snorkel, allowing you to explore both the cave and the outer reef. If you’re not diving, a half-day snorkelling trip is enough. Combine it with a morning exploring the town or the nearby Smoky Cape Lighthouse for a rewarding day out.

Nearby Areas Worth Combining

• South West Rocks: The gateway to Fish Rock Cave, with accommodation, dining, and the historic Trial Bay Gaol – a fascinating spot with coastal views.
• Smoky Cape Lighthouse: A short drive south, this 1891 lighthouse offers panoramic ocean vistas and is a great spot for whale watching (June–November).
• Hat Head National Park: Just north, this park features coastal heath, pristine beaches like Gap Beach, and walking trails with Aboriginal heritage sites.
• Port Macquarie: 45 minutes south, this vibrant town has a lively waterfront, Koala Hospital, and the Coastal Walk with stunning views.
• Kempsey: A historic town on the Macleay River, with local museums and the iconic Macleay Valley Bridge – worth a stop on the drive.

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