Agincourt Reef

  • Location Latitude:  15°58’58.2″S Longitute: 145°49’20.8″E
  • Depth:  0-35 metres
  • Visibility: 20 – 25 metres
  • Access: via boat or helicopter from Port Douglas
  • Size: 3950 hectares
  • Postcode: 4877

Agincourt Reef is a cluster of five reefs 65 kilometres east of Port Douglas.   Together these beautiful reefs cover a total of 3950 hectares.

Reef Size

  •  510 hectares – Reef one
  • 620 hectares Reef Two
  • 1250 hectares Reef three
  • 1260 hectares Reef Four
  • 310 hectares Reef Five

Along this Reef are swim-throughs, coral bommies, drifts and walls for visitors to explore.

Agincourt is a famous Reef suitable for all scuba diving and snorkelling levels, with 16 sites to explore.

This Reef has large Reef clusters (bommies) that have formed underwater canyons and tunnels.

Marine Life

See Maori wrasse, giant clams, clownfish, sea anemones, unicornfish, yellow-striped barracuda and turtles.   In the shallows of the Reef are  Lizardfish, parrotfish, damselfish and rays.

This Great Barrier Reef site is a series of smaller reefs with at least sixteen sites to explore.


This site has exciting swim-throughs and caves for visitors to explore.


Coral Gardens have thousands of brightly coloured fish, including Sergeant Major Damselfish, Parrotfish and Wrasse.

Castle Rock

Castle Rock has a depth of 24 metres, and visitors can enjoy 15-metre visibility.

At the southern end of this Reef is Castle Rock.  This site has a tall coral peak that rises from a steep sand slope, offering shallow and deep water diving.

Here scuba divers can play with a 1.2-metre Malabar grouper.

This Agincourt Reef site is just around the corner from the continental shelf.

Nearby Reef shallows on Castle Rock are perfect for snorkelers.  With amazing Reef life to be seen, such as Giant Clams.  Parrotfish, clownfish and rays.   This Reef site has staghorn coral and boulder coral with Christmas tree worms.

Blue Wonder

Blue Wonder offers an incredible coral wall dive to 40 metres. This site is breathtakingly beautiful, with an exceptional variety of colourful Reef fish.

Nursery Bommie

Nursery Bommie is a coral peak that rises from 25 to 30 metres on Agincourt Reef.   Here you will find soft corals, sea whips and sea fans.

This Reef location offers a fantastic variety of marine life, including leafy scorpion fish, lionfish, trevally and barracuda.

Take your pick from the award-winning Quicksilver Reef platform, Silversconic and Poseidon Reef Tours to see this fantastic Reef location.

Agincourt Reef Map

Local Operators include the famous Quicksilver Reef pontoon, where visitors can snorkel and do all levels of scuba diving.

Visitors who prefer to stay dry can view the Reef in the underwater observatory and the semi-submersible submarine.  This operator also includes scenic helicopter flights over the Great Barrier Reef.

Then learn more about nearby Great Barrier Reef locations.

Next, choose one of these trips to visit Agincourt Reef.


Quicksilver Cruises