People take to the beach at night to cool off in Sydney
The mercury may be dropping here but in Sydney people have been taking to the beach at night to cool down.
The city is enjoying an early summer heatwave and have been enjoying temperatures of up to 37C this week.
People have just sweltered through the city's second hottest night on record and its hottest December night in 148 years, with many forced to cool off at beaches long after dark.
A minimum of 27.1C was recorded in Australia's largest city early on Wednesday, Australian Bureau of Meteorology forecaster Jordan Notara said.
It's the hottest overnight minimum recorded there in five years.
Beaches, rivers and swimming pools have been crowded with people cooling off.
The hottest December minimum nighttime temperature on record had been Christmas Day in 1868, when the temperature dipped to 26.3C.
"It was mainly due to the hot day yesterday when we didn't have the sea breeze cool things down as significantly as it could have," Mr Notara said of Wednesday's minimum.
Sydney was forecast to reach 38C during later today after hitting 37.8C on Tuesday.
Electricity supplier Endeavour Energy was able to cope with the increased demand from Sydney air conditioners on Tuesday and was prepared for Wednesday's heat, company spokesman Peter Payne said.
A cool change was forecast late Wednesday afternoon with southerly winds expected to substantially cool the city.
Daytime temperatures peaked above 33C in the south-east capitals of Sydney, Canberra, Adelaide and Melbourne for the first time since 1965.
Like Sydney, the other three cities were expecting cool changes late Wednesday.