Sandbox is a stunning snorkel site on the edge of a channel within Opal Reef, part of the Outer Great Barrier Reef off Port Douglas. The site features sandy patches that gradually slope into shallows, transitioning from deeper boulder corals to expansive gardens of staghorn coral and vibrant giant clams. The diverse habitat attracts everything from pelagic species on the deep side to large schools of reef fish in the shallows. On calm days, adventurous snorkelers can swim out to deeper bommies where red bass, trevally, and barracuda school in the clear waters.
Sandbox (Opal Reef site)
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Wave Height 0.1 mSwell Period 7.0 sWind Speed 8.8 knPrecipitation 2.4 mmTidal Phase flood
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Community contribution: submitted by Daniel
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Moderate risk: Marine stingers
Marine stingers (box jellyfish and Irukandji) are present in tropical Queensland waters, primarily during the warmer months.
Low risk: Tidal currents
Opal Reef sits near the edge of the continental shelf and can experience strong tidal currents, especially around the channel edges at Sandbox.
Low risk: Wind chop
Southeasterly winds can create choppy conditions on the outer reef, making snorkeling more challenging.
Low risk: Remote open-ocean location
The site is on the outer reef in the Coral Sea, accessible only by boat; open ocean conditions apply.
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Getting in
Snorkel tour
Entry
Sandbox is located on Opal Reef, approximately 50 km east of Port Douglas, North Queensland. Access is exclusively via guided snorkel tour operators such as Wavelength Reef Cruises, which departs from Port Douglas Marina. The journey takes about 1.5 hours by catamaran.
Parking & facilities
Paid parking available at Port Douglas Marina and surrounding public car parks. Arrive early to secure a spot.
toilets
Day tour costs approximately AU$230–$340 per adult, including snorkel equipment, lunch, and reef guide. Check with operators for current pricing.
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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