Big Reef lies about 1.2 km south of Point Danger off Portland, Victoria, on the Discovery Coast. This exposed offshore reef drops from 5 m to 15 m depth, with a quick drop on the eastern side and a gradual slope to the west. Once a major contributor to the commercial abalone catch, the reef still offers dramatic underwater terrain with crevices, boulder fields, and kelp beds. Snorkeling here is best on calm, low-swell days with light winds. The site sits within reach of the Point Danger Marine Sanctuary, known for its diversity of sea slugs, reef fish, and eagle rays. Access is primarily by boat from Portland Harbour ramps, about 15 minutes away.
Big Reef (Point Danger, Portland)
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Poor conditions. Stay out today.
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Wave Height 0.3 mSwell Period 11 sWind Speed 25 knPrecipitation 17 mmTidal Phase slack
Last evaluated
DANGER: Explicit Risks Present
Big Reef (Point Danger, Portland) has hazards marked as danger. Entering the water here means you may face serious risks to your personal safety.
- Remote offshore location danger
Located 1.2 km offshore. Snorkelers must be strong swimmers and self-sufficient; no immediate shore access.
The spot
Community-maintained
Community contribution: submitted by Daniel
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High risk: Remote offshore location
Located 1.2 km offshore. Snorkelers must be strong swimmers and self-sufficient; no immediate shore access.
Moderate risk: Swell exposure
Big Reef is fully exposed to southern and south-westerly swells. Requires calm conditions with low swell and light winds.
Moderate risk: Strong currents
Strong currents and undertows can develop around the reef, particularly during changing tides and higher swell periods.
Moderate risk: Swell Dependant
Big Reef is very weather-dependant and best dived in low swell with light winds. Large southerly swells make the site dangerous or impossible.
Low risk: Boat traffic
Access is by boat only; nearby boat lanes and fishing vessels operate in the area around Point Danger.
Low risk: Rapid Depth Change
The eastern side drops quickly from 5 m to 15 m, which can disorient snorkelers not expecting the sudden drop-off.
Wildlife Guide
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Getting in
Boat
Entry
Big Reef is located approximately 1.2 km south of Point Danger, Portland. Access is by boat only, about 15 minutes from the Portland Harbour boat ramps on Lee Breakwater Road (North and South ramps available).
Parking & facilities
Parking available at Portland Harbour near the Lee Breakwater Road boat ramps.
boat_rampparking
No fees for launching at Portland Harbour public boat ramps. Point Danger Marine Sanctuary is a no-take sanctuary zone.
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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