Following a mild Sunday with a top of 20 degrees, Sydneysiders can expect an early taste of summer on Tuesday and Wednesday when temperatures are forecast to hit 28 degrees in the city and 33 degrees in the west.

"Monday will be about 24 degrees but it will really start warming around Tuesday," said Lachlan Maher, a meteorologist at Weatherzone.

Temperatures in Sydney are expected to hit 28 degrees in the city and 33 degrees in the west on Tuesday and Wednesday. Credit:Katherine Griffiths

Warm temperatures will continue throughout Tuesday evening and into Wednesday morning, when it will be a minimum of 14 degrees, which is six degrees above average morning temperatures for September.

Winds are expected to accompany the spike in temperature on Wednesday but "it'll be nothing like what we've seen in the past couple of weeks", Mr Maher said.