Kianinny Bay is the small cove on the southern side of Tathra Head that houses the town's boat ramp. Merimbula Divers Lodge lists it as an Open Water shore dive with a maximum depth of 18 m, calling it spectacular at high tide. Large boulders run from the shallow bay down to a sandy bottom at about 16 m. The shop's list of marine life includes garfish, schools of yellowtail, nudibranchs, sea hares, stingrays, pufferfish, leatherjackets and gurnards.

The boulder slope is the main feature. Boulders create overhangs and crevices where leatherjackets, wrasse and blue groper shelter, and the rock carries kelp, sponges and sea squirts. On the sand at the base, stingrays and gurnards are common, along with flathead. Nudibranchs and sea hares are found on the algae in the shallows, and garfish school near the surface. Because it is next to Tathra Wharf, it shares that site's rich growth to some degree, though without the wharf's spectacular gorgonian display.

The dive suits Open Water divers and is a straightforward alternative when the Tathra Wharf entry is too rough or too crowded with anglers. The two key rules are to dive at or near high tide, when the water covers the shallow approach, and to keep to the left of the ramp to avoid boats. Facilities are basic but the town is close. It also works as a night dive in calm conditions, when stingrays and octopus are active on the sand and among the boulders. Shore anglers use the rocks either side of the bay, so watch for lines near the edges and keep clear of anyone casting.

From Tathra town centre take the road south towards the Kianinny boat ramp (signposted), just over the headland from the wharf. Park in the boat-ramp car park. Enter beside the ramp on the left side, away from launching boats, and swim out over the boulders.

Merimbula Divers Lodge describes it as within the Tathra township at the boat ramp and recommends diving at or near high tide.

Merimbula Divers Lodge says the site is only suitable in favourable weather and should be dived at or near high tide. The bay faces east and is exposed to easterly swell; southerly swell is partly blocked by the headland. Avoid north-easterly winds, which also affect nearby Tathra Wharf.

Visibility falls after heavy rain when the Bega River flushes.

Enter at high tide on the left of the ramp, follow the boulders out as the bay deepens to the sand at about 16 m, then work along the boulder–sand edge before returning shallower through the boulders. Keep left to stay away from boats.

Merimbula Divers Lodge lists Kianinny Bay as an Open Water shore dive (3–18 m, favourable weather only). Dived independently by visiting divers.