Melbourne's spring weather has sent records tumbling, with forecasters predicting the longest November heatwave in more than 150 years.

The city has sweltered through its first taste of summer early this year, and if temperatures stay as high as predicted, it will be Melbourne's first seven-day spell of temperatures higher than 28 degrees in November since official records began in 1862.

Melbourne is halfway though its hot streak, and unless you plan on being poolside for the rest of the week, there's not much relief in sight.

The mercury hit 34 degrees on Tuesday and Melburnians are expected to toss and turn through another sticky night with the temperature not expected to drop below 22 degrees.