Big Brother is a revered dive and snorkel site on the outer reef of the Cocos (Keeling) Islands, a remote Indian Ocean atoll. The site features a steep coral wall adorned with dense hard and soft corals, including large gorgonian sea fans, with excellent visibility averaging 25 m. The reef teems with pelagic life — grey reef sharks, dogtooth tuna, and trevally patrol the drop-off while turtles and manta rays glide through the blue. The pristine, uncrowded reef is part of the Cocos Keeling Islands Marine Park, one of the healthiest reef systems in Australia with minimal bleaching impact.
Big Brother (dive site)
IntermediateSKIP
SKIP
Poor conditions. Stay out today.
Showing last known conditions
Wave Height 1.4 mSwell Period 12 sWind Speed 2.5 knPrecipitation 14 mmTidal Phase slack
Last evaluated
The spot
Community-maintained
Community contribution: submitted by Daniel
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Moderate risk: Tidal currents
The site can experience moderate to strong tidal currents, especially on the incoming tide which brings upwelling and active pelagic feeding.
Moderate risk: Deep drop-off
The site is located on the outer reef with a deep wall dropping to 30-40 m, requiring careful depth management.
Low risk: Wind-dependent access
The site is only accessible on calm days when winds are low, typically during the summer months (November-March).
Wildlife Guide
No wildlife notes for this spot yet.
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Getting in
Snorkel tour
Entry
Big Brother is a dive site in the Cocos Keeling Islands Marine Park, accessed by boat from West Island or Direction Island. The only dive operator on the islands is Cocos Dive, run by local guide Dieter Gerhard. Pre-booking is essential as spaces are limited.
Parking & facilities
Parking available at the jetty/launch points on West Island.
toiletsparking
Dive/snorkel tours are arranged through Cocos Dive — prices vary; book in advance.
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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