Cairns is one of the world’s top destinations for diving and snorkelling, thanks to its direct access to the Great Barrier Reef, the largest coral reef system on Earth. Just a short boat ride from the coast, this underwater paradise offers crystal-clear waters, vibrant coral gardens, and an incredible diversity of marine life.

Whether you're a first-time snorkeller or a certified diver, there are experiences for every level. Day tours from Cairns take you to outer reef locations like Agincourt Reef, Moore Reef, or Saxon Reef, where you can float above colourful corals, spot playful clownfish, glide alongside sea turtles, and, if you're lucky, encounter reef sharks or manta rays. The warm tropical waters and excellent visibility make the experience truly magical.

For divers, Cairns is a gateway to some of the most spectacular dive sites in Australia. Certified divers can explore deep walls, coral bommies, and drift dives, while beginners can enjoy introductory dives with experienced instructors. Multi-day liveaboard trips offer the chance to visit remote reef areas and even enjoy night dives to see the reef’s nocturnal creatures in action.

If you're not ready to dive, snorkelling is equally rewarding. Many tours provide floating platforms, guided snorkel sessions, and marine biologist talks to help you learn about the reef’s delicate ecosystem. Plus, you can often combine your snorkelling trip with a semi-submersible ride or a scenic helicopter flight for a different perspective of this natural wonder.

Diving and snorkelling in Cairns isn’t just an activity — it’s a bucket-list experience, offering a close-up look at one of the most biodiverse and beautiful places on the planet. Whether you're floating on the surface or diving into the deep, the Great Barrier Reef promises an unforgettable adventure beneath the waves.