Meet the site
Betsey Island is the largest island at the mouth of the Derwent, lying off South Arm where the river meets Storm Bay, with Little Betsey Island close by to the east. It is Hobart's closest 'ocean' island dive, and its reefs are influenced by cleaner Storm Bay water more than the sites upriver. The reef consists of dolerite boulders and ledges covered in kelp and brown algae in the shallows, giving way to sponge-covered rock and sand in deeper water. Typical fish include blue-throated and purple wrasse, leatherjackets, bastard trumpeter, magpie and banded morwong, and weedy seadragons are found in the weed. Rock lobster shelter in the crevices, and fur seals from Storm Bay sometimes visit. The island's main diving attraction, however, lies to the west of Little Betsey, where Hobart's ships' graveyard holds a dozen scuttled vessels and bridge sections. Many club trips combine a wreck dive in the graveyard with a reef dive on the island. Betsey Island is a nature reserve and an important seabird breeding site; landing is not permitted. Visibility is variable: after a dry spell and on an incoming tide it can exceed 10 m, but Derwent floods and southerly swell quickly reduce it. The island suits Open Water divers with some cold-water experience on its sheltered side, and Advanced divers on its exposed seaward reefs.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Betsey Island is recorded as Island in Hobart & Derwent. 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 Betsey Island 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 Betsey Island 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, southern rock lobster, blue-throated wrasse, purple wrasse, leatherjackets, bastard trumpeter, magpie morwong, banded morwong, weedy seadragons, rays, fur seals
Location
Island at the mouth of the Derwent off South Arm, facing Storm Bay, with rocky reef, kelp and sponges on its seaward (southern and eastern) side.
Facilities nearby
South Arm boat ramp with parking and toilets; fills in Hobart.
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
godivetas.com.aumarinelife.org.auRecord updated 27 Sept 2026. Source claims are being reviewed.
