Bad weather and beach erosion has forced authorities to close the Mon Repos turtle rookery to tourists near Bundaberg in southern Queensland.
The Queensland Parks and Wildlife Service has closed turtle encounter tours at Mon Repos three weeks early.
Head ranger Cathy Gatley says recent flooding and storms severely damaged the beach and it is unsafe for night tours.
She says 380 turtles came ashore this season but ex-tropical cyclone Oswald washed away about 59 per cent of egg clutches.
Ms Gatley says 16,000 tourists visited the conservation park before the flooding.
The turtle hatching season will begin again in November.
© ABC 2013
12:22 EST Temperatures reached up to 28.5 degrees in Brisbane yesterday, marking a very warm start to August and the hottest August day since 2009.