Australia Heatwave 2026: Temperatures to Hit 48°C | Splittly

South-east Australia is bracing for a punishing heatwave, with the Bureau of Meteorology (BoM) warning that temperatures could soar as high as 48°C (118°F) in some regions. The extreme conditions are set to challenge records and test the resilience of communities across Victoria, South Australia, and New South Wales.

Record-Breaking Heat

Forecasters predict that the mercury will climb steadily throughout the week, peaking on Friday. Inland towns are expected to bear the brunt of the heat, but coastal cities including Adelaide and Melbourne will not be spared, with tops of 40°C+ predicted.

"This is a severe intensity heatwave," said a senior meteorologist at the BoM. "The duration and the overnight minimums remaining high are what make this particularly dangerous for health." Total fire bans have been declared across multiple districts as the hot, dry, and windy conditions elevate the bushfire risk to 'Catastrophic'.

Health and Safety Warnings

Authorities are urging Australians to stay hydrated, avoid outdoor activities during the hottest part of the day, and check on elderly neighbors and relatives. Surf Life Saving Australia is also on high alert, expecting thousands to flock to beaches to cool off, warning of strong currents and the importance of swimming between the flags.

Climate Trends

This latest heatwave aligns with long-term climate projections for Australia, which point to more frequent, longer, and more intense heat events. As 2026 kicks off with sweltering temperatures, the conversation around climate adaptation and heat resilience in urban planning is becoming more urgent than ever.