​Scientists have confirmed what anyone who lived through the past summer knows to be true - climate change is driving hotter and longer summers that are becoming "the new normal", according to scientists, with worse to come unless tough decisions are made.

The summer of 2016/17 produced not only Sydney's hottest summer on record, Canberra's hottest summer for daytime temperatures and Brisbane's hottest summer in terms of mean temperature, but Queensland's second hottest summer on record and the hottest summer temperatures on record for almost 45 per cent of NSW.

Scientists have called it "the angry summer" as more than 205 records were broken in just 90 days, according to a new report from the Climate Council.

"We are into the latter half of the critical decade, and temperatures are continuing to increase and extreme weather events are worsening. Climate change is increasing the frequency, duration and intensity of heatwaves and warm spells. Hot days and heatwaves, like those experienced in the 2016/17 angry summer, are becoming the new normal, and even more extreme heat is on the way in future unless rapid and deep reductions in greenhouse gas emissions are achieved around the world," the report warned.