Meet the site
The cliffs on the eastern side of the Port Arthur entrance run south towards Budget Head and Cape Pillar, and the Marine Life Network guide describes the reef at their base in 5-30 m. It is a narrow band of rocky reef that gives way to a flat sandy bottom scattered with boulders, and the guide notes that the marine life is shaped by surge – the shallows are dominated by tough brown algae and kelp rather than delicate invertebrates. Deeper down, the boulders on the sand provide shelter for fish and rock lobster and host sponges and other invertebrates. Common fish include wrasse, leatherjackets, magpie morwong and banded morwong, and rays forage on the sand. This is not a showpiece site but a useful option for boats launching from Port Arthur, which is often calm when the Eaglehawk Neck coast is rough. The scenery above water, with high dolerite cliffs, is impressive, and the area sees few divers. Combine it with a shallower dive inside Port Arthur, such as Point Puer or Carnarvon Bay, for a sheltered second dive. Details come from an older guide; expect to explore. For divers staying at Port Arthur or Nubeena, the eastern cliffs make a convenient boat dive without the long run to the Tasman Sea coast. Wildlife on the way often includes fur seals, dolphins and seabirds, and the Port Arthur Historic Site is visible from the water on the return trip. A boat with a sounder and a local skipper will find the best patches of boulder reef.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Port Arthur Eastern Cliffs is recorded as Reef in Tasman Peninsula. The listed access is boat (day trip). Confirm the actual meeting point, route and permission to visit; a map pin does not establish any of these.
Topics flagged by the stored research
These are questions prompted by the existing notes, not a verified or complete hazard assessment.
- Other water users
- Ask about vessel activity, exclusion areas and the agreed surface arrangements.
- Water movement
- Ask how swell and local exposure affect the proposed entry, exit and route.
Historical access notes exist for this record, but have not been independently verified for current use. Request current directions from the operator or site manager rather than following an old entry description.
Questions, answered
Is Port Arthur Eastern Cliffs suitable for my certification?
The record lists Advanced Open Water. That does not establish suitability for every route or day. Share your training, recent experience and equipment needs with the operator and ask about the specific proposed dive.
Can I book Port Arthur Eastern Cliffs through YouDive?
YouDive is an independent research directory. Contact an operator directly to confirm whether it currently runs the trip, the inclusions and the booking terms.
What you might see
Kelp and brown algae, sponges, blue-throated wrasse, leatherjackets, magpie morwong, banded morwong, rays, rock lobster
Location
Narrow reef at the base of the cliffs on the eastern side of the Port Arthur entrance, running towards Cape Pillar.
Before you make plans
Conditions, access and operator schedules can change. This is a location guide, not a dive plan. Ask a local operator about current conditions and suitability for your training and experience.
Sources & further reading
marinelife.org.augodivetas.com.auRecord updated 27 Sept 2026. Source claims are being reviewed.