The Dudley Point Bommies are a large area of intermittent coral reef about 800 m off Dudley Point on the East Point peninsula, in 7-8 m. DSAC describes many coral bommies with soft corals and sponges and a variety of small, colourful fish, and notes that the shallow depth allows long dives. marinelife.org.au adds good corals and clownfish. Darwin's natural reefs are not the clear-water coral gardens of the Great Barrier Reef. The harbour is a macro-tidal, turbid system, and its reefs are low rock platforms and bommies covered in sponges, soft corals, gorgonians, sea whips and hardy hard corals that tolerate silt and big tidal flows. What they lack in visibility they make up for in density of life and the chance of turtles, rays and big fish.

The bommies are scattered over a wide area, so the dive is a gentle tour from one outcrop to the next across sand and rubble. Each bommie is a small ecosystem: anemones with clownfish, sponges, soft corals and hard corals, with damselfish, butterflyfish and wrasse around them. It is ideal for newly certified divers, for training and for photographers who want long, shallow bottom times. marinelife.org.au warns that the site is exposed to strong currents and needs careful planning, so the neap slack is as important here as anywhere in Darwin. On a good day it is also a snorkelling option, although stinger season and crocodile awareness apply. It pairs naturally with the deeper DSAC Barge nearby, making a sensible two-tank morning: the barge first while gas and no-deco time are fresh, then the bommies as a long, shallow second dive.

Boat. From Cullen Bay Marina or the Cullen Bay ramp run north around Emery Point and past Fannie Bay to Dudley Point, about 10-15 minutes. The bommies are about 800 m offshore.

The DSAC Barge lies a little further out, so the two are often combined. Anchor on sand between bommies. The site is exposed to strong currents - time it for neap slack.

Tide is everything in Darwin Harbour: the spring range is 7-8 m and tidal streams run hard through the harbour, so diving is generally only possible on neap tides (range under about 3-4 m), timed to the slack at high water when clearer ocean water sits over the site. Spring tides bring strong currents and silt-laden water with near-zero visibility. The dry season (May-October) gives the most consistent conditions; the south-east trade winds can chop up exposed water in the afternoon, so mornings are best.

In the wet season (November-April) run-off from the rivers and creeks drops visibility, afternoon storms build quickly, and the harbour is in cyclone season; box jellyfish are present October-May.

Descend to the sand between the bommies and swim a loop from bommie to bommie, looking for clownfish in their anemones and small reef fish. At 7-8 m bottom time is limited by gas rather than no-deco time. Return to the anchor before the tide starts to run.

Darwin Dive Centre and Dive Darwin use the harbour reefs for reef dives and training on neap-tide charters, often as a second dive after a wreck; Darwin Sub Aqua Club dives them on club days. No daily schedule.