Nestled along the rugged Warrnambool coast, Merri Marine Sanctuary spans 29 hectares from Thunder Point to Breakwater Rock, protecting a remarkable mosaic of intertidal rock platforms, subtidal calcarenite reefs, and sandy seabeds. The cold, crystal-clear Southern Ocean waters nourish dense kelp forests that sway between Middle and Merri Islands — the remains of an ancient sand dune — where colorful sponges, rock lobsters, and abundant fish life hide beneath overhangs and in crevices. The rich canyon between the two islands is a snorkeler's highlight, packed with marine life in oxygen-charged waters.
Merri Marine Sanctuary
IntermediateMAYBE
MAYBE
Fair. Experienced snorkellers only.
Showing last known conditions
Wave Height 1.2 mSwell Period 10 sWind Speed 11 knPrecipitation 29 mmTidal Phase slack
Last evaluated
DANGER: Explicit Risks Present
Merri Marine Sanctuary has hazards marked as danger. Entering the water here means you may face serious risks to your personal safety.
- Middle Island closure danger
Middle Island is closed to the public; do not attempt to land or approach.
The spot
Community-maintained
Community contribution: submitted by Daniel
Know before you go
Logged by the community, confirmed by mods
High risk: Middle Island closure
Middle Island is closed to the public; do not attempt to land or approach.
Moderate risk: Strong currents and undertows
Powerful currents and undertows are common, especially near the river mouth and around the islands. Only experienced snorkelers should venture out in these conditions.
Moderate risk: Large Southern Ocean swells
The sanctuary is regularly exposed to large swells from the Southern Ocean, making conditions unpredictable. Swell risk peaks during winter months.
Moderate risk: Unexpected large waves
Sneaker waves can wash over rock platforms without warning. Always keep an eye on the ocean and never turn your back to the sea.
Moderate risk: Large unexpected waves on rock platforms
Sneaker waves can surge onto rock platforms without warning, posing a risk to snorkelers and walkers.
Low risk: Slippery rock platforms
Intertidal rock platforms become extremely slippery when wet. Shoes with good grip are essential when walking to and from entry points.
Low risk: Cliff edges and unstable drop-offs
Steep cliff edges border parts of the sanctuary. Stay well back from cliff edges and bases to avoid falls or rockfalls.
Wildlife Guide
No wildlife notes for this spot yet.
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Getting in
Shore entry
Entry
Located within the City of Warrnambool in western Victoria. From the Princes Highway (A1) in Warrnambool, follow Merri Street south to the foreshore. The sanctuary stretches from Thunder Point in the west to Breakwater Rock in the east, with multiple beach access points along the coastal reserve.
Parking & facilities
Parking available along the foreshore near the sanctuary entrance points, including near the Merri Street end and at Thunder Point. No dedicated snorkeling parking lot — use street parking or coastal reserve car parks.
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Free entry — no fees required.
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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