Meet the site
Fosters Rock lies off Outer Head at the entrance to Wedge Bay, on the Storm Bay side of the Tasman Peninsula. The Marine Life Network guide describes rocky pinnacles, drop-offs and walls in 10-25 m, with crayfish and small reef fish. The pinnacles rise from a sandy bottom and are covered in kelp and brown algae on their upper parts, with sponges and other invertebrates increasing on the steeper, deeper faces. Rock lobsters shelter in ledges and cracks, and wrasse, leatherjackets, morwong and bastard trumpeter are common. It offers more relief and depth than the shallow reefs inside Wedge Bay, making it the pick of the western-side sites for divers with some experience. The site is exposed to westerly and southerly swell and is best on calm days or with light easterlies, when the east coast is likely to be rough. Documentation is limited to older guides and it is rarely visited, so divers should expect to explore. Wedge Bay and Nubeena are quiet holiday areas with boat ramps, a store and accommodation, and Fosters Rock combines well with Wedge Island for a relaxed two-dive day. Divers based in Hobart can reach Nubeena in about 90 minutes, making a day trip practical for groups with their own boat. Carry filled cylinders from Hobart or Eaglehawk Neck, as there is no dive shop on this side of the peninsula. A torch helps to look into the ledges where lobsters and small invertebrates hide, and a sounder makes finding the pinnacles much easier. When the western side is calm and the east coast is blown out, this is one of the better alternatives.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Fosters Rock is recorded as Pinnacle/Bommie 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 Fosters Rock 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 Fosters Rock 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
Southern rock lobster, wrasse, leatherjackets, magpie morwong, bastard trumpeter, sponges, kelp
Location
Rocky pinnacles and drop-offs off Outer Head at the entrance to Wedge Bay on the western Tasman Peninsula.
Facilities nearby
Boat ramps, toilets, store and fuel at Nubeena; no fills on the western side.
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.auRecord updated 27 Sept 2026. Source claims are being reviewed.