Portland Bay Reef sits just outside Portland Harbour, a boat-only site where a rounded limestone reef drops to 10–15 metres and is alive with fish, sea dragons, and the odd crayfish. The reef's proximity to the working harbour means snorkellers must check for planned ship movements before entering the water. With often-clear water and a sheltered aspect, it's a favourite for underwater photographers who appreciate the mix of rocky structure, kelp growth, and resident marine life.
Portland Bay Reef
IntermediateMAYBE
MAYBE
Fair. Experienced snorkellers only.
Showing last known conditions
Wave Height 0.3 mSwell Period 11 sWind Speed 18 knPrecipitation 16 mmTidal Phase slack
Last evaluated
The spot
Community-maintained
Community contribution: submitted by Daniel
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Logged by the community, confirmed by mods
Moderate risk: Ship traffic
The reef lies on the outside of the working harbour. Snorkellers must check for planned ship movements before diving.
Moderate risk: Depth range
The reef drops to 10–15 metres, well beyond recreational snorkelling depth for most. Snorkellers should stay near the surface or use freediving skills.
Low risk: Boat-only access
Accessible only by boat; no shore entry. Requires coordination with a vessel and safe anchoring near the reef.
Wildlife Guide
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Getting in
Boat
Entry
Portland Bay Reef is located off the Portland Harbour corkscrew channel. Launch from the Portland boat ramps (Town Jetty or the ramp near the harbour). Head outside the harbour breakwater — the reef is on the outer side of the harbour. Check with the Portland Harbour Master for any scheduled ship movements before launching.
Parking & facilities
Ample boat and trailer parking is available at the Portland Harbour boat ramp precinct near the Town Jetty.
parkingboat_ramptoilets
No entry fee. Standard boat launching fees may apply at council-managed ramps.
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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