Explore the Wonders of Thetford Reef

Situated 70 kilometres east of Cairns and just a short boat trip from the popular Green Island, Thetford Reef is a hidden gem waiting to be discovered. Spanning 2 kilometres, this picturesque reef offers a diverse array of underwater landscapes, from scattered coral heads to sandy floor areas teeming with marine life. With its abundance of swim-throughs and captivating dive sites, Thetford Reef promises an adventure-filled experience for divers of all levels.

Underwater Adventure Awaits

Thetford Reef is a playground for adventure-seekers, with numerous canyons, passages, and swim-throughs to explore. Dive into the crystal-clear waters and discover a vibrant world of colours, where large Gorgonian corals, boulder head corals, and soft corals create a mesmerising backdrop for your underwater exploration. Watch for elusive pygmy seahorses hiding amongst the Gorgonian coral, exciting your dive.

Encounter Larger Marine Life

Thetford Reef is home to an impressive array of marine life, including larger pelagic fish such as mackerel, tuna, trevally, and wrasse. Dive alongside the majestic spangled emperor, red bass, and blue and gold fusiliers as they navigate the reef for food. With its shallow night diving opportunities, Thetford Reef offers a unique chance to encounter nocturnal marine creatures in their natural habitat.

Captivating Dive Sites

Explore the depths of Thetford Reef with its captivating dive sites, each offering its own unique charm and allure. From the panoramic views of 360 to the tranquil beauty of Blue Lagoon, every dive promises an unforgettable experience filled with wonder and excitement. Dive into the depths of Cathedral and discover the awe-inspiring beauty of this underwater sanctuary.

Marvel at the Marine Life

Keep your eyes peeled for anemones, damselfish, butterflyfish, and angelfish as they dance amongst the coral formations. Encounter giant clams and rabbitfish as they go about their daily lives, adding to the vibrant tapestry of marine life that inhabits Thetford Reef.


Embark on a journey of discovery and adventure at Thetford Reef, where every dive promises an unforgettable encounter with the wonders of the underwater world. Whether you’re exploring its captivating dive sites, encountering larger marine life, or marvelling at the vibrant coral formations, Thetford Reef is sure to leave you awe-inspired and longing for more.