Australia's Summer of Extremes: Wettest in Nearly a Decade and Eighth-Hottest on Record
The Bureau of Meteorology has confirmed that Australia just experienced its wettest summer in nearly a decade, with rainfall 32% higher than average across the country. This marks the rainiest summer season since 2016-17, according to the bureau's comprehensive summary. Simultaneously, the 2025-26 summer ranked as Australia's eighth-hottest on record, with temperatures 1.1°C above the 1961-1990 average.
Dramatic Weather Swings Across the Nation
This summer season ricocheted from extremely hot to intensely wet across various parts of the country, with South Australia experiencing some of the most acute weather swings. The state endured severe January heatwaves followed by significant February floods, creating what climatologists describe as "weather whiplash" conditions.
Only one summer in the 20th century was hotter than this recent season, according to Bureau of Meteorology climatologist Qian Zhou. That exceptional summer occurred in 1997-98, which registered 1.11°C hotter than average. Remarkably, nine of the ten hottest Australian summers have occurred since 2012-13, highlighting a concerning warming trend.
Record-Breaking Heat and Rainfall Events
The heatwave event in late January proved particularly severe, with 62 weather stations recording their highest-ever daily maximum temperatures between January 26 and 31. South Australia experienced its fourth-hottest summer on record, with Andamooka reaching 50°C on January 29 and Port Augusta hitting the same extreme temperature on January 30.
February brought dramatic rainfall contrasts across the nation. South Australia's February rainfall was an astonishing 356% above average, making it the state's second-wettest February after 2011. Large parts of the state's north-east recorded their highest-ever February rainfall following an exceptionally dry January.
"The switching between dry and wet conditions was quite remarkable," said Associate Professor Andrew King, a climate scientist at the University of Melbourne. "We witnessed heatwaves and fires followed by rain and floods in rapid succession."
Climate Change Implications and Future Outlook
Professor King emphasized that Australia's summers have always been severe weather seasons, but climate change is intensifying these patterns. "We should be expecting some of these types of extreme weather events to get worse as we continue to warm the planet," he warned. "We know that heat and fire weather is getting worse with climate change. And in some parts of Australia, extreme rain events are getting more intense as well."
Summer nighttime temperatures across Australia were the fifth-warmest on record, with some inland areas of Western Australia and Northern Territory experiencing their hottest-ever summer nights based on average minimum temperatures. Three towns in Western Australia's north-west recorded their hottest summer nights on record, including Paraburdoo Aero at 35.8°C on January 7, which also represented the hottest minimum temperature nationwide this summer.
Regional Variations and Autumn Forecast
February rainfall was higher than average across all states and territories except Tasmania, which recorded 17% lower than usual precipitation. Despite the overall wet conditions, some areas in southern Australia continued to suffer from rainfall deficiencies, according to climatologist Qian Zhou.
The Bureau of Meteorology forecasts that above-average rain is likely to continue during autumn for northern Australia, with drier conditions expected in southern regions. Warmer-than-usual days and nights are anticipated for most of the country, alongside an increased fire risk for parts of Western Australia, South Australia, New South Wales, and Victoria.
This summer's extreme weather patterns serve as a stark reminder of Australia's vulnerability to climate variability and the increasing intensity of weather extremes in a warming world.
