Very warm air is being directed across the Harbour City this morning ahead of a trough, but conditions will change significantly this afternoon.

As of 9:30am AEST, the mercury had already climbed above 29 degrees. Temperatures are expected to peak in the low-to-mid 30's shortly after midday. 

A gusty S/SE’ly wind change is then due to arrive around 1pm this afternoon, which will quickly drop the temperature below the 20 degree mark. Cloud will also increase through the afternoon, as moisture is brought onshore. 

Following a much cooler day on Saturday, warmth will rebuild in time for the Labour Day public holiday (NSW, ACT and SA) on Monday.