Robe – Cape Dombey and Obelisk Reefs

Meet the site

The reefs off Cape Dombey, below Robe's white-and-red Obelisk and the modern lighthouse, are the town's main open-coast dive. The Marine Life Network describes a shallow, kelp-covered rocky bottom at 7-12 m, with limestone reef cut by crevices and overhangs, large boulders and caves with interesting marine life. The Obelisk, built in 1855 as a navigation marker, and the 1972 lighthouse are popular lookouts, and from either you can read the swell before committing.

Underwater it is classic Limestone Coast terrain: a canopy of kelp and brown algae over pale limestone that the swell has carved into ledges, undercuts and small caves. The crevices hold southern rock lobster, blue-throat wrasse, magpie morwong, sweep, leatherjackets and old wives, and the sand channels host rays and flathead. Seadragons – both weedy and leafy occur along this coast – may be found in the weed. Cold water and upwelling in summer give the reef a lush, temperate feel similar to western Victoria.

The catch is exposure. Cape Dombey takes the full force of the Southern Ocean and there is no dive shop or charter in Robe, so the site is dived by locals and visitors with boats on genuinely flat days. Robe itself is a historic 1840s port with accommodation, restaurants and a sheltered harbour, making it a pleasant base for a Limestone Coast trip that combines coast and Mount Gambier caves. It suits self-sufficient divers with boat experience in temperate open water. Fills and hire are 130 km away in Mount Gambier, so bring enough cylinders for the trip.

What you might see

Kelp and brown algae, southern rock lobster, blue-throat wrasse, magpie morwong, sweep, old wives, leatherjackets, rays, flathead, seadragons possible

Location

Shallow kelp-covered limestone reef with crevices, overhangs and boulders off Cape Dombey and the Obelisk on the western edge of Robe.

Facilities nearby

Robe marina/boat ramp, toilets and parking at the marina and Obelisk lookout; accommodation and cafes in Robe. Nearest air fills and hire: Dive Experience, Mount Gambier.