Bribie Island Second World War Fortifications, Second World War fortifications on Bribie Island, Queensland, Australia

The Bribie Island Second World War fortifications are concrete structures along the northern beaches that include gun emplacements, searchlight buildings, and observation posts. These were built for coastal defense and monitored ship movements between Bribie and Moreton Islands.

The fortifications were built between 1939 and 1943 as a key military outpost for monitoring shipping lanes. Two six-inch guns from the First World War were moved here to establish the artillery capability at this strategic coastal position.

Fort Bribie served as the Examination Battery for Moreton Bay, where ships identified themselves before entering the Brisbane River. The permanent residents of the island's eastern side were moved out when the Australian Army arrived in 1939. Colonel John Whitelaw, Commander Coast Defences, inspected the site in 1940–41 and his recommendations shaped the fort, which was operational by early 1942.

Access to the northern fortification sites requires a four-wheel-drive vehicle permit as they are located in a remote area. Climbing on the structures is not allowed due to safety risks and should be avoided.

The two six-inch guns at Fort Bribie were surplus First World War weapons hauled across Pumicestone Passage from the mainland. They sat on cruciform mountings, and after firing the pivot tilted quite dramatically, so the mountings proved inadequate. Colonel John Whitelaw inspected the site in 1940–41 and his recommendations were carried out in 1941.