Bommies off Mica Beach are a series of submerged granite boulders and rocky reef formations scattered just offshore from the 400-metre-long, east-facing Mica Beach on the Cox Peninsula. These "bommies" (local term for isolated reef outcrops) create excellent snorkeling terrain with boulder rubble, shallow gutters, and small overhangs that attract fish seeking shelter. The beach is backed by a low foredune with low sandstone headlands at either end. Located near Mandorah, this spot offers a wild, remote snorkeling experience in Darwin Harbour, though conditions are heavily influenced by extreme tides. Snorkelers must be vigilant about saltwater crocodile presence — the area is known crocodile habitat — and the strong tidal currents that sweep through the harbour. Access is by boat or via the ferry from Darwin to Mandorah, then a short drive. The bommies are best explored on a big high tide close to the neap phase when the water is calmest and clearest.
Bommies off Mica Beach
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DANGER: Explicit Risks Present
Bommies off Mica Beach has hazards marked as danger. Entering the water here means you may face serious risks to your personal safety.
- Saltwater crocodile presence danger
Saltwater crocodiles (Crocodylus porosus) are common in Darwin Harbour and the Cox Peninsula. Sightings have been reported at Mica Beach. Never enter the water alone, avoid dawn/dusk, and heed local warnings.
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High risk: Saltwater crocodile presence
Saltwater crocodiles (Crocodylus porosus) are common in Darwin Harbour and the Cox Peninsula. Sightings have been reported at Mica Beach. Never enter the water alone, avoid dawn/dusk, and heed local warnings.
Moderate risk: Outgoing tide current
Darwin Harbour experiences extreme tidal ranges (up to 8 m). Strong outgoing currents rip through the bommies channels, capable of sweeping snorkelers out to sea. Snorkel only on neap tides and close to high tide slack water.
Moderate risk: Box jellyfish stinger season
Box jellyfish (Chironex fleckeri) are present in coastal waters of the Top End during the wet season, posing a serious stinging hazard. Peak season is October to May.
Low risk: Sharp barnacle-covered rocks
The bommies are granite boulders with sharp barnacle-encrusted edges. Low visibility at certain tides makes it easy to scrape against the rock.
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Getting in
Mica Beach is located on the Cox Peninsula near Mandorah, about a 30-minute ferry ride from Darwin to Mandorah, then a short drive west along the Wagait Beach road. The beach is east-facing and accessible via a dirt track off the main road. The bommies are visible at low tide as dark patches offshore.
Limited unsealed parking near the beach access track on the Cox Peninsula road. No formal car park.
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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).
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- Spot content licensed under CC BY-SA 4.0. How's the Spot is open source.