Meet the site
Cape Wiles Lagoon is one of the more remarkable sites on the wild lower Eyre Peninsula coast. The Marine Life Society describes a sheltered lagoon about 30 km south-west of Port Lincoln, reached by boats launched off the beach at Fishery Bay by 4WD, with an island hosting a New Zealand fur seal colony, and water that is always clear and calm inside. The lagoon's bottom features car-sized boulders at 6-15 m, and a small cave about 50 m long at 15 m (a torch is needed). The Society lists western blue groper, gorgonians, crayfish, ascidians and sponges, and in the lagoon morwong, blue groper, harlequin fish, drummer, cuttlefish, blue devils and perch. Fur seals from the island regularly investigate divers. Access is the challenge. Whalers Way, the scenic coastal drive to the area, crosses private property and requires a permit and key, and a beach launch is only possible on the rare calm days this coast offers. The surrounding coast is spectacular but exposed, with cliffs and crevasses such as Theakstones Crevasse, which the Society notes is rarely dived due to its exposed position. Cape Wiles suits adventurous, self-sufficient divers with a 4WD and small boat, and rewards them with clear water, seals and one of the best-kept secrets of Eyre Peninsula diving. Tell someone your plans, carry a satellite beacon or VHF radio, and be prepared to abandon the trip if the swell rises while you are out – the beach relaunch at Fishery Bay can be dangerous in any surf.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Cape Wiles Lagoon is recorded as Reef in Eyre Peninsula. The listed access is boat. 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.
- 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 Cape Wiles Lagoon 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 Cape Wiles Lagoon 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
New Zealand fur seals, western blue groper, harlequin fish, morwong, silver drummer, cuttlefish, southern blue devils, perch, southern rock lobster, gorgonians, sponges, ascidians
Location
Sheltered lagoon about 30 km south-west of Port Lincoln near Cape Wiles, with a New Zealand fur seal colony on an island, car-sized boulders and a 50 m cave at 15 m, in 6-15 m of usually clear, calm water.
Facilities nearby
None; Port Lincoln services.
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 26 Sept 2026. Source claims are being reviewed.