The southern side of Rabbit Island is, in Scuba Doctor's words, a boat dive site for adventurous divers, a weedy, rocky bottom in 2–10 m with shallow reef species such as wrasse, dusky morwong and old wives. It is the companion to the northern site and the one to use when a northerly wind makes the north face choppy and the south face the lee. The reef is a fringe of granite boulders and low rock along the island's southern shore, thickly covered in kelp and mixed brown algae, breaking up into sand and seagrass a short way out.

Under the weed the rock has crevices with abalone, crabs and small crayfish, sponges and ascidians on the shaded faces, and the shallow-reef fish – wrasse, dusky morwong, old wives, leatherjackets, zebrafish, sweep and magpie perch – with stingarees and flathead on the sand and the occasional Port Jackson shark under a ledge. Because the southern shore faces Bass Strait it takes surge in the shallows even on fair days, and the offshore area is current-affected with relatively poor visibility at times as Corner Inlet's ebb pushes turbid water around the island; the best conditions are a calm northerly day on the last of the flood at slack. It is not a site anyone would cross Bass Strait for, but for a boat out of Port Welshpool on a day when the outer Prom is too rough it gives a sheltered, shallow reef dive with plenty of fish, and with the northern face 700 m away it offers a two-dive day around one small island close to the ramp.

Within the Wilsons Promontory Marine Park; check current zoning.

As for Rabbit Island North: launch at Port Welshpool, run about 15 km out of Corner Inlet's eastern entrance (30–40 minutes) and round the island to its southern side; anchor in sand off the weedy rock at slack water. The southern shore takes surge from Bass Strait, so it is a site for northerly winds and small swell. Port Welshpool has fuel, a general store and a caravan park for overnight stays.

Best with calm seas, no swell and no wind; light offshore north-westerly to north-easterly winds may be acceptable on this southern face, which is otherwise exposed to Bass Strait. Scuba Doctor notes the offshore area can be current affected with relatively poor visibility at times, and that the shallows are sometimes affected by surge, particularly on the southern shore. Slack water only.

Summer and autumn northerly-wind days.

Anchor off the southern shore at slack, descend to the weedy rock at 4–8 m and work along the island's southern face with the rock on one shoulder, staying out of the surge zone inside 3 m, to a maximum of 10 m. Turn at half gas or when current builds, return to the anchor and ascend with an SMB ready.

No dive charter operates at Wilsons Promontory. Sites are dived from club and private trailer boats – Dive La Trobe, VSAG, Melbourne University Underwater Club and Dive Victoria Group run occasional camping-and-diving trips – launching at Tidal River (beach launch, permit/key from Parks Victoria), Port Welshpool or Sandy Point. Wilsons Promontory Cruises (Port Welshpool) runs sightseeing cruises to Skull Rock and the islands but no diving.