North Bommie is the main reef of the group of bommies just north-east of Ulladulla Harbour, and it is the dive the local shop uses most for new divers and relaxed fun dives. The Marine Life Network gives a depth of 18 m and describes walls, canyons and large boulders teeming with large schools of yellowtail and pomfrets, only five minutes from the harbour. Dive Adventures Ulladulla lists a maximum of 22 m and a standard 15–18 m, and names a shallow cave on the bommie The Penthouse.

The reef is broken into walls and blocks, leaving canyons between the boulders that are easy to explore and navigate. The fish schools are the main attraction: yellowtail scad and pomfrets often surround divers, with silver sweep, one-spot pullers, mado and leatherjackets over the reef. Eastern blue devilfish and wobbegongs sit under the boulders, and red morwong, blue groper and sergeant bakers are common. Sponges and sea squirts grow on the shaded walls. Nearby, a separate North-East Bommie at 10–14 m is described as similar and loaded with fish, while the deeper East North Bommie reaches 26 m.

The short run, moderate depth and simple layout make this a good choice for Open Water divers, refresher dives and training. The Penthouse gives newer divers a taste of a cave with an easy exit. Experienced divers use it as a relaxed second dive after Burrill Rocks or The Hole. It is also a good place for photographers to practise on schooling fish, since the yellowtail and pomfrets tend to hang around the boulders rather than scattering, and the canyons give a natural backdrop.

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 North Bommies are about five minutes from the harbour, heading north-east past the breakwall.

The operator anchors on the main bommie; East North Bommie (documented separately) is a deeper reef in the same group about 2 km from the wharf.

Close to the harbour and partly sheltered from southerly swell by Warden Head, so it is diveable on many days when the southern sites are not. Exposed to north-easterly and easterly seas; summer afternoon north-easterlies make the surface choppy, so morning dives are preferred. Swell over about 2 m causes surge on the shallower parts of the bommie.

Visibility falls after heavy rain.

Descend to the bommie and circle it clockwise along the base at 15–18 m, dropping into the canyons between boulders. Visit The Penthouse cave on the way round, then come up onto the top of the bommie for the last part of the dive and the safety stop.

Dive Adventures Ulladulla dives North Bommie frequently (max 22 m, standard 15–18 m, fish schools and The Penthouse cave); it is a common first ocean dive for students.