Summer is about to make a return to Sydney. But it will only be a fleeting visit.

On Monday temperatures will soar past 30 degrees, with the city to expect a top of 35.

But if you are not chained to a desk you should get out and about under the sun while you can – this glimpse of summer will be a short one.

Duty forecaster Andrew Haigh from the Bureau of Meteorology said Monday's maximum temperatures were forecast in the mid-30s in both the city and the west.