As Tropical Cyclone Marcia heads towards the largest nesting colony of loggerhead turtles in the South Pacific Ocean, a group of dedicated volunteers are relocating eggs on Mon Repos beach to safety.

There are over 400 individual nesting turtles on the beach near Bundaberg, and on average each turtle will lay four clutches of eggs per season, Queensland Parks and Wildlife Service (QPWS) ranger-in-charge at Mon Repos Turtle Centre, Cathy Gatley, said.

She said volunteers, including about 15 at Mon Repos Beach this morning, had been relocating eggs all along the beaches near Bundaberg in anticipation of the wild weather.

"This is the main nesting beach for the endangered loggerhead turtles so we've been here making sure that we relocate any nests that may be exposed," Ms Gatley said.

Turtle nests are relocated due erosion caused by Tropical Cyclone Marcia at Mon Repos beach. ( ABC News: Courtney Wilson )

"As the dunes are eroded away and the eggs exposed, we pick them up and put them in a bucket, and move them further up the beach.

"They're on the same beach but they're moved further up the dunes to where they'll be safe."

For the endangered loggerhead turtle, successful hatching and nesting at Mon Repos is critical to the species' survival.

The area is home to the largest concentration of marine turtles on the eastern Australian mainland, and the Mon Repos Turtle Centre supports the turtles' nesting and hatching over the summer months.

In the 2012-2013 season 60 per cent of egg production was lost due to Cyclone Oswald.

Volunteers moved 13 clutches of eggs on Thursday and continued relocating eggs to safety on Friday.

Marcia made landfall about 7:30am (AEST) as a category five storm near Shoalwater Bay, between St Lawrence and Yeppoon in central Queensland.

Wind gusts up to 250 kilometres per hour were being recorded as it moved south along the Queensland coast.

A cyclone warning has been issued from Sarina and Double Island Point, north of Gympie, extending inland to Duaringa, Moura, Biloela, Monto, and Mundubbera.