Lighthouse Wall runs along the seaward face of a small rocky islet directly below Ulladulla Lighthouse on Warden Head, separated from the mainland by a narrow channel. It is one of the few regular drift dives on the NSW South Coast. The format is simple: enter at the northern end of the bommie, drop to the sand at about 18 m and let the prevailing southerly current carry you along the base of a wall that rises around 4 m to a top at roughly 14 m. By the time the wall fades into small boulders at the southern end you have covered about 600 m in 40–50 minutes.

The wall is pocked with small cracks and holes that shelter moray eels, and its face carries sea squirts, sponges and gorgonians. The sand at its base is worth watching. McFadyen reports small rays, bull rays and Australian angel sharks, and the local operator promotes shark sightings on this dive. Along the wall there are sergeant bakers, red morwong, nudibranchs and schooling silver sweep, yellowtail, sea pike, leatherjackets and bream. The mix of reef and sand life means a good variety in one dive.

The site is close to the harbour, so it is often dived when the longer run to Burrill Rocks is uncomfortable, provided the swell is not pounding the islet itself. A strong current can take divers deeper than planned, so the dive suits Advanced divers who can control depth and deploy a surface marker. On calm days with no current it can be dived as an out-and-back from the northern end. Water temperature ranges from about 13 °C in late winter to 21 °C in late summer and visibility is usually reasonable.

Boat access only. Charters and private boats launch from the public ramp inside Ulladulla Harbour, reached off the Princes Highway in the centre of Ulladulla (about three hours' drive south of Sydney); there is trailer parking around the harbour and the dive shop is a short walk away. The site is only a couple of minutes from the harbour mouth: run south to the rocky islet off Warden Head, separated from the shore by a narrow boat channel below the lighthouse.

Drop divers at the northern end of the bommie (McFadyen's start mark) and follow their bubbles or SMB for the 40–50 minute drift, collecting them at the southern end about 600 m away.

The wall faces east and south-east, so a big southerly or easterly swell breaks heavily on the islet and makes the shallow parts unpleasant. Light to moderate conditions from the west or north are ideal. The dive depends on the usual southerly set along the coast, which McFadyen says will almost always be running south; a strong current can pull divers deeper (to 23 m or more).

Without current the dive is still good but becomes an out-and-back. The site is close enough to the harbour to be a fall-back when the longer runs are blown out.

Enter at the northern end, descend to the sand at about 18 m and let the current carry you south along the base of the wall, which rises about 4 m to a 14 m top. Check the cracks and holes for morays and scan the sand for rays and angel sharks. After 40–50 minutes and about 600 m the wall breaks up into small boulders; deploy an SMB, do the safety stop drifting and wait for pick-up.

Dive Adventures Ulladulla runs Lighthouse Wall as a regular drift dive (lists max 28 m, standard 15–22 m, with shark sightings). Also dived by visiting Sydney clubs using Ulladulla Harbour.