Sydneysiders are in for a wild start to the week, with coastal rain and winds from Monday afternoon expected to bring about "one of the more wild days the city has seen for a while".

Daytime temperatures will be about average for June, with predicted top temperatures of 19 degrees on Monday and 17 on Tuesday, but the weather could become "fairly miserable" thanks to increasing rain and strong winds from Monday afternoon, Tom Hough, meteorologist at Weatherzone, said.

Wild weather is expected to cross the state's coastline on late Monday afternoon, with damaging winds and surf predicted. Credit:Adam McLean

"Tuesday has the potential to be fairly miserable for anyone in the city, it's going to be a pretty wet and very windy day," he said.

While a small amount of rain is expected on Monday, between 20 and 40 millimetres could fall on Tuesday - the likes of which has not been seen in Sydney since March, he said.