The Illawarra region is bracing for a severe heatwave this week, with the Bureau of Meteorology issuing an official warning as temperatures are forecast to soar to 35 degrees Celsius.
Heatwave Details and Forecast
The intense heat is set to begin on Thursday, December 18, 2025, with a predicted top of 34 degrees. The mercury will climb even higher to 35 degrees on Friday, before remaining in the early 30s across the weekend. This spike is well above the average December maximums for the region.
To put the forecast in perspective, the mean maximum temperature for December in Albion Park is 25.6 degrees. In Bellambi, it's 24 degrees, and in Kiama, it's just 22.4 degrees.
What Defines a Heatwave?
While hot weather is expected in an Australian summer, meteorologists emphasise that this event meets the specific criteria for a heatwave. According to the Bureau of Meteorology, a heatwave occurs when both maximum and minimum temperatures are unusually hot over a three-day period, compared to the local climate and historical data.
"It takes more than a high daily maximum temperature to make a heatwave," the Bureau explains. "It's also about how much it cools down overnight."
Cooler nights allow the body to recover from the day's heat. During a heatwave, high overnight temperatures mean the heat stress is continuous, putting significant extra strain on the body as the next day heats up rapidly.
Staying Safe and Looking Ahead
With the heatwave coinciding with the busy pre-Christmas period, authorities are urging residents and visitors to take precautions. Key advice includes:
- Staying hydrated.
- Avoiding strenuous outdoor activity during the peak heat of the day.
- Checking on vulnerable neighbours, the elderly, and pets.
While detailed predictions for Christmas Day are not yet available, current forecasts extend to Tuesday, December 23. The community is advised to stay updated with the latest warnings.
Residents are encouraged to download the free Hazards Near Me app to receive timely alerts about bushfires and other emergencies during this period of extreme weather.
