Dive Site: Raine Island

About Raine Island

Raine Island is a pivotal dive site located in the Far Northern Great Barrier Reef, approximately 85 kilometers east-north-east of Cape Grenville and just over 4 nautical miles south of the island itself. It stands as an important, remote, and largely unexplored part of the reef, offering an expedition-style diving experience. The underwater topography features steep oceanic walls, flourishing coral gardens, and a reef top sloping gradually from about one meter down to five meters before a sharp drop to depths exceeding 30 meters. This location is globally recognized as the largest and most critical nesting area for green sea turtles, drawing thousands of females to its shores annually, especially between October and March. Divers here frequently encounter large numbers of green sea turtles, along with grey and whitetip reef sharks, barracuda schools, and manta rays during specific conditions. The site also boasts diverse macro marine life, including nudibranchs, shrimps, and pipefish. The strong oceanic currents contribute to exceptional water clarity and resilient coral systems, which maintain high coral cover. Due to its remote location and exposure to oceanic conditions, Raine Island is exclusively accessible via liveaboard, requiring a liveaboard journey from Cairns or Horn Island. Diving here is suited for experienced divers comfortable with potential strong currents and deep wall dives, promising a wild and unfiltered underwater adventure away from crowded tourist routes.

Dive site facts: Raine Island

Depth

5–40+ m

Current

Moderate to strong

Visibility

10–25 m

Water temperature

24–30 °C

Entry

Liveaboard / drift dive

Level

Advanced Open Water

Dive type

Wall, drift, big_animals, reef

Night dive

Possible

Region / port

Far Northern Great Barrier Reef

Coordinates

11.5900° S, 144.0300° E

Conditions & Currents

Raine Island is known for common and potentially strong oceanic currents, particularly around its exposed reef structures. These currents contribute to the exceptional water clarity and the health of the coral systems but require divers to be proficient in drift diving techniques and comfortable with dynamic conditions. Due to the deep wall and potential for strong currents, dives are typically conducted as drift dives, with boats unable to anchor in the deep waters. Divers should be prepared for varying current strengths, which can change quickly, necessitating careful gas planning and excellent buoyancy control. The visibility is typically very good, ranging from 10 to 25 meters, often reaching exceptional clarity, though strong currents can sometimes stir up particulate matter closer to the reef.

Marine life & sighting chances

Green sea turtle

October to March · common

Tiger shark

occasional

Grey reef shark

common

Whitetip reef shark

common

Barracuda

common

Manta ray

April to October · occasional

Sea snake

occasional

Nudibranch

common

Shrimp

common

Pipefish

common

Black snapper

common

Bluestreak fusilier

common

Surgeonfish

common

Bumphead parrotfish

occasional

Dive profile & how the dive runs

Dives at Raine Island are typically conducted as drift dives along the northern wall due to the depth and strong currents, and the inability of boats to anchor. Divers usually enter the water near the reef's edge, which slopes gradually from one meter to about five meters, before dropping steeply to over 30 meters. The main objective is to explore the vibrant coral wall, often descending to around 20 meters to take in the gorgonians and coral trees. Divers drift along the wall, observing the abundant marine life, particularly the green sea turtles and potential tiger sharks. The dive concludes with a controlled ascent and safety stop, typically in the blue, before surfacing for boat pick-up down current.

Underwater photography

Capturing the essence of Raine Island's vibrant wall and abundant marine life requires careful consideration. For wide-angle shots of the impressive coral walls and schooling fish, a fisheye or wide-angle lens is ideal. This is especially true for showcasing the large number of green sea turtles and the occasional pelagic encounters. For macro enthusiasts, there is a rich biodiversity of nudibranchs, shrimps, and pipefish, best photographed with a macro lens and powerful strobes to highlight intricate details and colors. Given the potential for strong currents, maintaining excellent buoyancy and stability is crucial for sharp images. Be mindful of marine life, especially the nesting turtles and feeding tiger sharks, and maintain a respectful distance to avoid disturbance.

Combine with nearby dive sites

• Great Detached Reef

  Raine Island is just north of this larger reef system.

• Tijou Reef

  Another remote and pristine dive location in the Far North GBR.

• Bougainville Reef

  Offers pristine walls and pelagic action in the Coral Sea.

Getting there & logistics

Raine Island is an extremely remote destination within the Far Northern Great Barrier Reef, accessible only by liveaboard expeditions. Trips typically depart from Cairns or Horn Island and can last for several days, such as 8-day/7-night itineraries. Travelers usually fly into Horn Island (adjacent to Thursday Island) for embarkation, or Cairns, depending on the specific liveaboard itinerary. Permits and fees for diving within the Great Barrier Reef Marine Park are generally included in liveaboard packages. This site is usually combined with other remote Far North GBR sites like Tijou Reef and sections of the Great Detached Reef to create a comprehensive expedition-style diving adventure, far removed from standard day-trip locations.

Safety & environment

Diving at Raine Island is considered an expedition experience suited for confident and experienced divers due to common and potentially strong currents, as well as significant depth variations. Divers should ensure they possess Advanced Open Water certification, with Deep Diver certification beneficial for some deeper areas. Given the remote location, robust dive insurance covering medical evacuation is highly recommended. The nearest recompression chambers would likely be in Cairns or Townsville, requiring substantial evacuation time, underscoring the need for careful dive planning and adherence to safety protocols. Site-specific hazards include encountering large pelagic predators like tiger sharks, attracted by the turtle nesting activity, and rapidly changing open-water conditions. Divers must maintain excellent buoyancy control, monitor their air consumption closely, and always dive within their limits and with a buddy.

Who it suits — and who it doesn't

FAQ

Raine Island FAQ

Liveaboards diving Raine Island

These liveaboards may visit Raine Island on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Spoilsport

Australia

28 guests30 m

$409/day

Odyssey Liveaboard

Australia

20 guests24 m

$392/day