The Arches Marine Sanctuary lies 700 metres offshore from Port Campbell on Victoria's Shipwreck Coast, a 48-hectare underwater wonderland of towering dune limestone arches, canyons, caverns, ledges and vertical sinkholes in 19–25 metres of water. High-energy Southern Ocean swells have sculpted this dramatic seascape, where the upper reef is cloaked in golden kelp (Ecklonia radiata) while the shadowy undersides of the arches burst with vibrant gorgonian sea-fans, lace corals, sponges, hydroids, and bryozoans — animals typical of deeper Bass Strait waters. This premier dive and advanced snorkel site is home to Port Jackson Sharks sleeping under ledges, schools of Bluethroat Wrasse, Barber Perch, Dusky Morwong, and visiting Australian Fur Seals.
The Arches Marine Sanctuary
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DANGER: Explicit Risks Present
The Arches Marine Sanctuary has hazards marked as danger. Entering the water here means you may face serious risks to your personal safety.
- Depth & Decompression Risk danger
Snorkel and dive sites range from 19–25 metres; deep freediving or unplanned descents carry serious decompression and blackout risks.
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Community contribution: submitted by Daniel
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High risk: Depth & Decompression Risk
Snorkel and dive sites range from 19–25 metres; deep freediving or unplanned descents carry serious decompression and blackout risks.
Moderate risk: Strong Ocean Swells
The site is exposed to prevailing south-west winds and swells from the Southern Ocean, creating high-energy wave conditions year-round.
Moderate risk: Strong Currents
Powerful tidal and ocean currents can sweep through the reef channels and arches, especially during changing tides.
Moderate risk: Remote Offshore Access
The sanctuary is 700 m offshore with no direct shore entry; access is by boat or licensed tour only, and weather conditions can change rapidly.
Low risk: Cold Water Temperatures
Southern Ocean waters are cold year-round (typically 12–17°C), increasing the risk of hypothermia without proper exposure protection.
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Getting in
The Arches Marine Sanctuary is located approximately 700 m offshore from Port Campbell, about 200 km west of Melbourne via the Princes Highway and Great Ocean Road. Most visitors access the site via licensed dive/snorkel tour operators departing from Port Campbell. Private boat access is possible using the Port Campbell Jetty Crane (restricted to permit holders — call Parks Victoria 13 1963). The nearest public boat ramp is at Port Campbell.
Parking is available at the Port Campbell foreshore and near the jetty area. No dedicated parking at the sanctuary itself as it is offshore.
No entry fee for the marine sanctuary itself. Licensed tour operators charge for guided trips. Boat launching via Port Campbell Jetty Crane requires a permit from Parks Victoria.
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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.