

Lighthouse Bommie is a coral pinnacle rising from deeper water, topping out around 5 metres below the surface. Visibility runs 12 to 20 metres, giving you a good read of the structure from a distance. Moderate currents sweep past the bommie and concentrate pelagic life here, so expect schools of trevally, barracuda, snapper, and mackerel working the water column. Reef sharks are a regular presence, and sea turtles often rest or cruise the shallower sections. Between May and October, dwarf minke whales are occasionally encountered in the area. Watch where you put your hands: lionfish and stonefish both inhabit this reef, and jellyfish appear seasonally.
-16.39917, 145.90000
Time your dive around slack water if possible, as the current can run hard enough to make working against it genuinely tiring. Confirm current conditions with your operator on the day, as they can shift quickly at this site.
The site is located on the remote Ribbon Reefs and is accessible only via multi-day liveaboard dive vessels, typically departing from Cairns or Port Douglas.
Access is exclusively via liveaboard dive boats, requiring multi-day trips.
A marine stinger season runs from approximately November to May, during which protective suits are recommended. Encounters with venomous stonefish and lionfish are possible.
Depth
5-25m
Visibility
12-20m
Skill Level
Intermediate
Entry
Boat
Boat required
Water Temp
23-29°C
Current
Moderate
Typical Dive
50 min
Best Time
May, Jun, Jul, Aug, Sep, Oct
Lighthouse Bommie in Queensland, Australia reaches depths between 5 and 25 metres. The shallower sections start around 5 metres whilst the deeper areas extend to 25 metres, making it suitable for intermediate divers. The varied depth profile allows for multi-level diving on the bommie structure.
Lighthouse Bommie near Cairns hosts dwarf minke whales, sea turtles, reef sharks, barracuda, trevally, snapper, lionfish and sea snakes. The site is particularly notable for dwarf minke whale encounters during their seasonal presence. Reef sharks and large pelagic species like barracuda and trevally patrol the bommie regularly.
The optimal months for diving Lighthouse Bommie are May through October. During these months, water conditions are most favourable with visibility ranging from 12 to 20 metres and water temperatures between 23 and 29 degrees Celsius. This period coincides with the dry season and calmer seas in the Cairns region.
Lighthouse Bommie requires an Open Water certification as the minimum diving qualification. The site is classified as intermediate level due to moderate currents and depths reaching 25 metres. Divers should be comfortable with boat diving and managing currents before attempting this site.
Access to Lighthouse Bommie is by boat from Cairns, the nearest town. The site requires boat transport as it is located offshore along the Great Barrier Reef. No shore entry is available for this dive site.
Divers at Lighthouse Bommie must be aware of strong currents, jellyfish, lionfish and stonefish. The moderate to strong currents require good buoyancy control and awareness during the dive. Venomous marine life including lionfish and stonefish are present on the reef, so maintain neutral buoyancy and avoid touching the bottom.
Lighthouse Bommie is classified as an intermediate level dive site and is not recommended for beginners. The site features moderate currents and depths to 25 metres, requiring an Open Water certification minimum. Divers should have experience with boat diving and current management before visiting this site.
A 3mm wetsuit is recommended for diving at Lighthouse Bommie in Cairns. Water temperatures range from 23°C to 29°C.
Lighthouse Bommie in Cairns has depths ranging from 5 metres to 25 metres.
A typical dive at Lighthouse Bommie in Cairns lasts approximately 50 minutes. Actual dive time depends on depth, air consumption, and conditions.