Back Beach Bommie is one of Bremer Bay Dive's shore-entry guided sites and, according to Marine Life Network, a 10-15 m dive with small marine life, sponges and corals, sea dragons and groper that is also a good night dive and an excellent photography site.

The bommie is a granite outcrop rising from sand, draped with sponges, encrusting and plate corals and ascidians and fringed with kelp. Seadragons – both leafy and weedy – are found in the weed around its margins, and blue groper and harlequin fish patrol the rock. The smaller life that makes Bremer Bay so good for macro photography is everywhere: nudibranchs, tube worms, basket stars, shrimps and crabs.

The dive is slightly deeper than the Little Boat Harbour trail and requires a swim from the beach to the bommie, so a guide is helpful the first time. At night, the bommie comes alive with crustaceans and octopus.

For visitors spending several days in Bremer Bay, Back Beach Bommie adds variety to the seadragon diving, and it is a useful option when wind direction rules out other sites. As with all Bremer Bay sites, divers should fill tanks and get the current advice at the dive shop before heading out. The shop's guides know where the dragons have been seen recently, which saves a lot of searching, and the modest depth allows long dives even in cold water if you are well insulated.

Bremer Bay is about 180 km (2 hours) north-east of Albany and 500 km (5-6 hours) south-east of Perth via the Albany Highway and Borden-Bremer Bay Road, or via the South Coast Highway and Bremer Bay Road. Air fills, hire gear and guided dives are available from Bremer Bay Dive in town. Back Beach is a short drive from the township; Bremer Bay Dive guides take divers there from the shop when conditions suit, and can point out the entry and route to the bommie.

Park at the beach access and carry gear to the sand.

Bremer Bay's shore sites are chosen by wind direction. Back Beach is an alternative when Little Boat Harbour is affected by easterlies; it needs small swell because any surf on the beach makes the entry and the swim to the bommie difficult. Mornings before the summer sea breeze are best.

Swim out from the beach on a compass heading (or with a guide) to the bommie, descend to its base at 12-15 m and circle it slowly, then work up the sides before returning to shore.

Bremer Bay Dive – local dive shop (operating since 1994) running guided seadragon shore dives most mornings at 8 am in suitable weather, scooter dives and gear hire – listed among its shore-entry guided sites.