Manta Arch is an iconic dive and snorkel site at South Solitary Island within the Solitary Islands Marine Park, off Coffs Harbour on the NSW North Coast. The site features a dramatic underwater archway over a narrow sandy gutter, creating a natural amphitheatre where Grey Nurse Sharks gather in impressive numbers. Thanks to the East Australian Current pushing warm tropical water south, the reef flourishes with an extraordinary blend of tropical and sub-tropical marine life — think clownfish (Nemo), blue tangs (Dory), and vibrant hard and soft corals draped over the rocky substructure. Depths range from 5–20 metres, making it a must-visit for competent snorkellers.
Manta Arch
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Wave Height 0.4 mSwell Period 6.5 sWind Speed 10 knPrecipitation 0.0 mmTidal Phase slack
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Community contribution: submitted by Daniel
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Moderate risk: Strong Ocean Currents
The East Australian Current can create strong, unpredictable currents around the island and through the arch, especially on an outgoing tide.
Moderate risk: Deep Water Entry
The site drops to 20 metres with no shallow shore entry; snorkellers should be confident in deep, open water.
Low risk: Boat Traffic
Access is by boat only and the site is near a transit lane; snorkellers must stay aware of vessel movements.
Low risk: Variable Visibility
Visibility can change rapidly due to swell, currents, and plankton blooms, ranging from 5–20+ metres.
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Getting in
Boat
Entry
Manta Arch is located at South Solitary Island, approximately 12 km north-east of Coffs Harbour. Charter operators (e.g. Jetty Dive Centre) depart from Coffs Harbour marina. The journey takes 20–30 minutes by boat. No public ferry service — book a guided snorkel/dive tour.
Parking & facilities
Park at Coffs Harbour Marina or Harbour Drive precinct (pay parking available). Arrive early on weekends.
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Tour fees vary by operator; expect approximately $100–$150 per person for a guided snorkel/dive trip including gear. No direct entry fee for the Marine Park itself.
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About this data
- Conditions last evaluated
- Spot data last updated
- Data sources
- Open-Meteo (marine & weather conditions), tide predictions via UTide, community contributors (descriptions, hazards, marine life).
- License
- Spot content licensed under CC BY-SA 4.0. How's the Spot is open source.
Weather & swell ┬╖ Open-Meteo marine & weather APIs Tides ┬╖ UTide harmonic analysis Sea & safety ┬╖ community reports