The bodies of a man and woman have been found on the northern tip of Bribie Island on Saturday morning, by a member of the public who was inspecting turtle nests within the protected area.

Detectives had many unanswered questions following the grim discovery, which was made about 8.15am on a remote beach, roughly three kilometres away from the northern tip of the island.

Police arrive at the beach on the northern tip of Bribie Island where the bodies were found. Credit:7 News Brisbane - Twitter

Senior Sergeant Scott Wiggins said the bodies were found on the open surf side of the northern tip, but the nearby jet ski was found on the calm side.

Locals have told police it's common for people to park their jet skis or boats on the calm side and walk across to the open side for a swim in the surf.