Sydney enjoyed a hot and sunny morning before a southerly changed dropped temperatures by up to 10 degrees. Manly and Bondi were teeming this morning as the mercury climbed, reaching 29 degrees in the city and 34 degrees at Terry Hills by lunch time. However, those that hit the sand late were soon to be disappointed when an early-afternoon southerly change arrived. Temperatures stood no chance as hot northerlies were replaced by cooler southerly winds. The mercury plunged by 10 degrees at Homebush in less than one hour before 2pm, while Canterbury dropped by nine. The cool change produced wind gusts of to 80 km/h at Wattamolla and 65 km/h at the Airport. Southerly winds will remain fresh in the wake of the change this afternoon, before easing overnight. The weekend is looking calmer although a cool air mass lingering over the city will see the mercury reach a top in the mid 20s each day. Onshore winds may even bring a few light showers on Sunday.