Sisters Rocks is a dramatic series of granite pinnacles rising from deep water off the Tasman Peninsula's rugged coast, approximately 12 km north of Pirates Bay. This exposed offshore site is renowned among Tasmania's diving community for its sheer walls draped in vibrant sponge gardens, soft corals, and seafans that thrive in the nutrient-rich Southern Ocean currents. The crystal-clear water, deep drop-offs, and spectacular sub-surface topography make it one of the most visually striking snorkel and dive locations in Tasmania, though it demands respect for the wild ocean conditions.
Sisters Rocks
AdvancedMAYBE
MAYBE
Fair. Experienced snorkellers only.
Showing last known conditions
Wave Height 0.7 mSwell Period 11 sWind Speed 1.8 knPrecipitation 9.0 mmTidal Phase unknown
Last evaluated
DANGER: Explicit Risks Present
Sisters Rocks has hazards marked as danger. Entering the water here means you may face serious risks to your personal safety.
- Open ocean swell exposure danger
Sisters Rocks is fully exposed to Southern Ocean swells. Large swell and wind waves can make the site inaccessible or dangerous without warning.
The spot
Community-maintained
Community contribution: submitted by Daniel
Know before you go
Logged by the community, confirmed by mods
High risk: Open ocean swell exposure
Sisters Rocks is fully exposed to Southern Ocean swells. Large swell and wind waves can make the site inaccessible or dangerous without warning.
Moderate risk: Strong tidal currents
Strong tidal currents rip around the pinnacles, especially during ebb and flood tides, posing a risk of being swept away from the rocks.
Moderate risk: Very cold water temperature
Water temperatures are very cold year-round (10–14°C / 50–57°F), requiring a thick wetsuit or drysuit for safety.
Moderate risk: Deep drop-offs with no shallow refuge
Depths drop sharply to 40+ metres around the pinnacles, with no shallow shelving — depth management is critical.
Wildlife Guide
No wildlife notes for this spot yet.
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Getting in
Shore entry
Entry
Sisters Rocks is located off Cape Surville, approximately 12 km north of Pirates Bay on the Tasman Peninsula. Access is by boat only from Pirates Bay or Fortescue Bay, requiring a vessel capable of handling open ocean conditions.
Parking & facilities
Parking available at Fortescue Bay boat ramp or Pirates Bay carpark; no parking at the site itself.
parking
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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