Australia has just sweltered through its hottest 12 months on record, a weather official said Thursday, a period of drenching floods, tropical cyclones and mass coral bleaching.

Senior government climatologist Simon Grainger said the rolling 12-month period between April 2024 and March 2025 was 1.61 degrees Celsius (34.9 degrees Fahrenheit) above average -- the hottest since records began more than a century ago.

"This is certainly part of a sustained global pattern," he told AFP.