Cathedral Rocks are a group of dramatic basalt sea stacks at the northern end of Jones Beach in Kiama Downs, one of the most photographed features on the Kiama coast. They can be seen from Bombo Headland, where Kiama Council's reserve offers views north over Cathedral Rocks, Jones Beach and Minnamurra Headland, and south to Bombo Beach and the town.

The rocks sit on the edge of a surf beach, and the reef around their bases is typical exposed Illawarra habitat – kelp, boulders and gutters with blue groper, drummer, luderick, leatherjackets and wrasse, and sea urchins in the crevices. Visibility is modest in most conditions.

The site's main problem is access: Jones Beach is an exposed surf beach with rips, so entry and exit are only practical on genuinely flat days, and surge around the stacks can be strong. Most divers visiting Kiama will find better-documented and safer options at Blowhole Point (Kiama Gutter and Afghan Reef) or by boat from Kiama Harbour. Cathedral Rocks is best treated as a scenic snorkel for experienced swimmers in perfect conditions, or simply enjoyed from the headland. Water temperatures on this coast range from about 14–15 °C in late winter to 22–23 °C in late summer, so a 7 mm wetsuit or semi-dry is sensible for most of the year.

From the Princes Highway take the Kiama Downs exit and follow the signs to Jones Beach or to Bombo Headland (parking off Hutchison Street, Kiama Downs; walking tracks and toilet). Cathedral Rocks are at the northern end of Jones Beach. Entry is from the beach, so only attempt it on a flat day; Bombo Headland to the south gives a good view of the conditions before committing.

Kiama's reefs face east and are exposed to swell from the north-east round to the south-east; a southerly swell wraps into the northern side of Blowhole Point less than an easterly does. Shore entries over the rock platforms need a swell under about 1 m and preferably a low-to-mid tide with a predictable surge cycle. North-easterly sea breezes build on most summer afternoons, so dive early.

Visibility is typically 8–15 m, sometimes 20 m in winter westerly weather, and drops after heavy rain and big seas. Jones Beach is an exposed surf beach with rips, so entry and exit through the surf are only practical in flat conditions.

On a flat day, swim out from the northern end of Jones Beach to the rocks, explore the reef around their bases in shallow water and return before any swell builds.

No operator; occasional freedivers and local divers.