Flinders Reef is an isolated oceanic coral reef rising from the Queensland Plateau in the Coral Sea, far beyond the outer edge of the Great Barrier Reef. This remote atoll-like system features a stunning main sand cay surrounded by crystal-clear waters where you can see your anchor 30 metres below. The reef's isolation has preserved a pristine marine environment with recovering coral gardens, nesting green turtles, and seasonal aggregations of tiger sharks and tawny sharks. The main sand cay, topped with a BOM weather station, serves as a roosting site for black-naped terns and other seabirds. Snorkelers can explore the reef edge drop-offs, coral bommies, and sandy channels in exceptional visibility, though the remote location and strong currents demand experience.
Flinders Reef (Coral Sea)
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DANGER: Explicit Risks Present
Flinders Reef (Coral Sea) has hazards marked as danger. Entering the water here means you may face serious risks to your personal safety.
- Extreme remoteness danger
The reef is extremely remote (140 nm from Townsville) with no emergency services, medical facilities, or resupply options.
The spot
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Community contribution: submitted by Daniel
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High risk: Extreme remoteness
The reef is extremely remote (140 nm from Townsville) with no emergency services, medical facilities, or resupply options.
Moderate risk: Southeast trade winds
Strong southeast trade winds create challenging sea conditions and can make return passages dangerous.
Moderate risk: Tiger sharks
Tiger sharks are known to aggregate around the Main Sand Cay, particularly during spring when they feed on turtle carcasses.
Moderate risk: Tidal currents
Tidal flows through passages between reef sections can create strong, unpredictable currents around the reef edges.
Wildlife Guide
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Gallery
1 photo from the community
Getting in
Flinders Reef is located approximately 140 nautical miles northeast of Townsville, Queensland, in the Coral Sea. Access is by private vessel or liveaboard charter only. From Townsville, head east-northeast past Myrmidon Reef (about 70 nm), then another 68 nm east into the Coral Sea. The main anchorage is behind the Main Sand Cay, sheltered from the southeast trade winds over sand bottom.
No parking available — this is a remote oceanic reef. Access is by boat only.
No direct fees for accessing the reef itself, but it lies within the Coral Sea Marine Park. Charter/liveaboard costs vary significantly.
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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.