Dive Site: Manta Arch

About Manta Arch

Manta Arch is a premier dive site located near the northern tip of South Solitary Island, approximately 8-9 nautical miles offshore from Coffs Harbour, New South Wales, Australia. This area is nestled within the Solitary Islands Marine Park, a unique ecosystem where warm currents from the Great Barrier Reef converge with cooler southern waters, fostering exceptional biodiversity. The site features an impressive underwater archway surrounded by large boulders and ridges, peaking at 15 meters and descending into gutters that extend down to 30 meters. These natural formations create a haven for marine life, including extensive anemone fields and varied hard and soft corals that thrive in the nutrient-rich waters. While Grey Nurse Sharks are present year-round, their numbers significantly increase during the cooler months, often exceeding 40-60 individuals congregating here. Divers can also encounter schooling pelagic fish, Wobbegongs, and various rays, making for dynamic encounters. This unique blend of tropical and subtropical species provides a vibrant diving experience throughout the year. Diving Manta Arch offers a blend of exploration through its arch and gutters, as well as opportunities for observing large aggregations of sharks and pelagics. Conditions can vary, with currents sometimes strong, necessitating careful dive planning. The site is accessible by boat from Coffs Harbour, typically within 30-40 minutes.

Dive site facts: Manta Arch

Depth

12–31 m

Typical dive

12–25 m, 50–60 min

Current

Moderate to strong

Visibility

10–30 m

Water temperature

18–24°C

Entry

Boat / drift

Level

Advanced recommended

Dive type

Reef, pelagic, shark

Night dive

Possible

Region / port

Coffs Harbour, NSW

Coordinates

24.1160° S, 152.7180° E

Conditions & Currents

Manta Arch can be exposed to strong currents from the East Australian Current (EAC), especially when it flows from north to south around the island. These currents can make the initial part of the dive challenging, requiring careful entry and descent procedures. However, once divers are underwater and near Little Birdy Island or within the arch's sheltered areas, they can often find respite from the main flow. Stronger currents typically attract large pelagic fish, enhancing the dive experience. Visibility can range from 10 to 30 meters, often improving with the EAC bringing clearer water. Divers should be comfortable with potential water movement and adept at maintaining buoyancy; drift diving techniques are recommended here, and a surface watch is crucial for boat safety.

Marine life & sighting chances

Dive profile & how the dive runs

A typical dive at Manta Arch begins with a boat entry, often as a drift dive, utilizing the East Australian Current. Divers descend near the northern tip of South Solitary Island, targeting the main archway at depths peaking around 15 meters. The route often involves exploring the arch and surrounding boulder formations before following narrow gutters that gradually deepen to 30 meters. This area is ideal for observing Grey Nurse Sharks, which are frequently found sheltering here. From the deeper gutters, the dive often progresses towards a pile of boulders rising from 21 meters, a known aggregation point for schooling pelagic fish. The current assists in moving divers along the reef, ensuring a dynamic experience. The safety stop typically occurs during the drift, allowing divers to clear their deco obligations while continuing to ascend gradually before surfacing for boat pickup.

Underwater photography

Manta Arch offers superb opportunities for wide-angle photography, especially when capturing the dramatic archway, the congregation of Grey Nurse Sharks, or schools of pelagic fish. A wide-angle lens (e.g., 10-24mm for APS-C or 16-35mm for full-frame) is essential to encompass the expansive topography and large animal subjects. External strobes are highly recommended to bring out the vibrant colors of soft corals and anemones found throughout the site, particularly in deeper sections or within the arch's shadows. Given the potential for currents, maintaining excellent buoyancy control is crucial to avoid disturbing marine life or kicking up sediment. Approach marine life, especially the Grey Nurse Sharks, calmly and without sudden movements to ensure natural behavior and ethical interaction.

Combine with nearby dive sites

• Cleaner Station
• Grey Nurse Gutters
• Buchanan's Wall
• Fish Soup
• Anenome Bay

Getting there & logistics

Access to Manta Arch is typically via day boats departing from Coffs Harbour, New South Wales. Coffs Harbour is centrally located on the NSW north coast, roughly halfway between Sydney and Brisbane, and is accessible by regional flights or road. Dive trips to South Solitary Island, where Manta Arch is situated, usually take 30-40 minutes by boat, covering a distance of approximately 8-9 nautical miles offshore. Trips often combine Manta Arch with other nearby sites within the Solitary Islands Marine Park, such as Cleaner Station or Grey Nurse Gutters, providing a comprehensive diving experience over a single or multi-day itinerary. No specific marine park fees for divers are mentioned in the sources, but it's advisable to confirm with local operators.

Safety & environment

The nearest recompression chamber facilities for diving emergencies are located in major cities in Australia, requiring potential air evacuation from Coffs Harbour. Therefore, comprehensive dive insurance covering medical emergencies and evacuation is strongly recommended. Manta Arch can experience strong currents due to the East Australian Current, making advanced dive experience and proficiency in drift diving techniques crucial. Always dive with a reliable surface watch from your boat, especially in variable current conditions. Maintain strict buddy procedures and stay aware of your depth and air consumption, particularly when exploring the deeper gutters down to 30 meters. Respect marine life, especially the Grey Nurse Sharks, by observing them calmly and avoiding any actions that might startle them.

Who it suits — and who it doesn't

FAQ

Manta Arch FAQ

Liveaboards diving Manta Arch

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

Spoilsport

Australia

28 guests30 m

$408/day

Odyssey Liveaboard

Australia

20 guests24 m

$392/day