Wollongong residents may have smelled smoke in the air this morning when they went outside.

A Rural Fire Service spokesperson said that smoke had been blown north from a bushfire at Callala Bay which started on Friday night.

The fire posed no threat to property but burned out 30ha of bushland before it was brought under control last night.

The spokesperson said the fire was creating a lot of smoke, which was then blown north by winds and not able to escape into the atmosphere due to last night’s cloud cover.

There was also a much smaller grassfire at Haywards Bay, which was brought under control last night.

The fire burned out 8ha of grassland last night and a fire truck will remain on scene today to ensure against any flare-ups.

The spokesperson said they had received a number of Triple 0 calls due to smoke in the air.

They reminded people not to call Triple 0 if they smell smoke but only if they see a fire that is unattended by a fire truck.