Meet the site
Twin Peaks is a pair of rock spires rising from deep water on the Forestier Peninsula's exposed east coast. Go Dive Tasmania describes the site as twin pinnacles with large schools of fish and a swim-through at 35 m, diveable anywhere from 5 m on the tops to 40 m at the base. The Marine Life Network guide records the same area as the Sundial Caves, with the Twin Peaks spires, a maze of caves and boulder formations in 15-35 m, and walls covered in sponges, hydroids, gorgonian fans and anemones. The dive combines the two great themes of this coastline: dramatic topography and the deep-water invertebrate gardens that the Eaglehawk Dive Centre calls its sponge gardens. On the upper spires kelp and brown algae dominate and fur seals sometimes flit past; below 20 m the rock becomes a patchwork of colourful sponges, sea whips and gorgonians, with butterfly perch in constant swirling schools. The caves and gaps between the boulders let divers weave through the structure rather than simply descending a wall, and the deep swim-through is a memorable feature for suitably qualified divers. Banded morwong, boarfish, real bastard trumpeter and rock lobster are common. The site is best suited to Advanced divers with good gas management; those with Deep certification can use the full profile. Like the Sisters it is exposed and only reached on calm westerly days, and currents can be strong around the spires. When conditions line up it offers a varied, three-dimensional dive that complements the wall at the Sisters and the caves of Waterfall Bay.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Twin Peaks (Sundial Caves) 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.
- Current and timing
- Ask how the operator assesses the current window for the actual route. Historical tide notes are not a departure instruction.
- Planned depth
- Confirm the intended route and training requirements; the recorded maximum is not a target.
- Water movement
- Ask how swell and local exposure affect the proposed entry, exit and route.
- Overhead environments
- Ask whether the plan stays entirely in open water. A wreck or cave listing is not permission or training to enter.
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 Twin Peaks (Sundial Caves) suitable for my certification?
The record lists Deep/Advanced + experience. 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 Twin Peaks (Sundial Caves) 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
Sponges, hydroids, gorgonian fans, sea whips, jewel anemones, butterfly perch, boarfish, banded morwong, real bastard trumpeter, southern rock lobster, fur seals
Location
Twin rock spires and a maze of caves on the eastern side of the Forestier Peninsula north of Eaglehawk Neck.
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.aueaglehawkdive.com.auRecord updated 27 Sept 2026. Source claims are being reviewed.