Boult Reef is one of the northern Bunker Group reefs, listed by Lady Musgrave Experience among the remote reefs of the region and by marine life writers as a site offering bommies, ledges and caves. It sits between Llewellyn and Hoskyn reefs and is visited only occasionally by private boats and special trips. The published marine life list includes larger fish such as Maori wrasse, tawny nurse sharks, wobbegongs, stingrays and manta rays.

The ledges and caves provide shelter for these animals and add structure to the dive, while the bommies attract reef fish. Detailed site descriptions and positions are not published, so divers should treat Boult as an exploratory reef and choose a sheltered side on the day. Because the northern Bunker reefs lie well away from day-trip routes, they tend to be quiet, with fish that are unused to divers.

Boult suits Open Water divers with experience of remote diving and current, who are part of a self-sufficient boat trip. Caves should be viewed from outside only unless divers are trained and equipped for overhead environments. It is one of a string of reefs, with Llewellyn, Lamont and Fitzroy, that make the northern Bunker Group an appealing multi-day cruising and diving area for yachts.

The Bunker Group reefs lie 80-100 km north-east of Bundaberg and 50-90 km east of the Town of 1770. Private boats launch from the 1770 Marina or Round Hill Creek ramp (bar crossing – check tides), or from Burnett Heads (Bundaberg Port Marina); expect 1.5-4 hours depending on vessel and destination. Yachts commonly anchor overnight in the Lady Musgrave or Fitzroy Reef lagoons and dive the surrounding reefs by tender.

Boult Reef lies in the northern Bunker Group, a remote run from 1770 or Bundaberg; yachts anchor in the lee of the reef in settled weather.

The Bunker reefs are open ocean: south-east trades over about 20 knots make the crossing from 1770 or Bundaberg rough and limit diving to the lee (north-western) sides, while the Fitzroy and Lady Musgrave lagoons provide secure anchorages. The best windows are September-December and March-May calms. Tidal currents run strongly around reef edges and through lagoon entrances on springs.

Cyclone season November-April; summer plankton reduces visibility.

Anchor in the lee, descend to the bommies and ledges at 12-18 m and explore the caves from outside, then return along the shallower reef for the safety stop.

No scheduled day trips. Lady Musgrave Experience mentions the northern Bunker reefs (Boult, Llewellyn, Lamont and Fitzroy) as remote sites for special or extended trips, Heron Island Resort has historically run occasional long-range trips to the northern Bunker reefs, and most diving is from private yachts and occasional liveaboards.