Integral Energy said about 5000 homes across the Illawarra and south to Ulladulla lost power, but most had it restored within two hours.

Mt Ousley residents were affected more than most, with 150 customers facing five-hour black-outs.

Most connections across the region had been fixed last night, though a small number of homes - including several in Kangaroo Valley - were still being attended to, an Integral spokeswoman said.

Winds peaked between 5.30am and 11.30am, averaging about 70km/h through the morning.

A wind averaging 30-40km/h is "a pretty good breeze - we'd get call outs for that," a State Emergency Service (SES) worker said.

A west-north-westerly gust at Bellambi at 7am reached 106km/h.

Wollongong SES received 63 call outs, split evenly between fallen trees, trees threatening to fall and roof damage.

"Calls were received from Dapto to Bulli and involved roof damage and fallen trees on houses and surrounding properties," the SES's Melanie Sutherton said.

Crews were also called in from the Shoalhaven to help with the clean up, which continued last night.

About 70 per cent of jobs had been completed by 6pm.

In Corrimal St, Wollongong, the collapse of a construction awning of the new Phoenicia building blocked southbound traffic for most of the day.

No one was injured by the collapse.

Several incidents on the Princes Hwy caused by the winds delayed motorists on their way to work.

Wires and metal roofing from a petrol station came down at Unanderra on the highway, causing moderate traffic delays around 8am, while a tree blocked traffic at Milton.

Blacked-out traffic lights at Fairy Meadow also caused congestion.

In Victoria, the SES responded to 118 calls, but damage was not as severe as predicted.

Highest winds recorded were 91km/h at Mt Dandenong, Bureau of Meteorology senior forecaster Ward Rooney said.

Winds were not as bad as the "extreme weather event" that hit Victoria in April.