Tangalooma Island Resort has become a refuge for about 220 people forced to leave camp grounds and holiday homes in the north of the island on Sunday.

They were forced out by an unpredictable bushfire sparked by a lightning strike a day earlier.

That blaze is now burning close to the tiny community of Bulwer, with people told to leave as crews try to steer the blaze around the township.

Erratic, high winds fanned the fire on Sunday, driving it towards isolated camp grounds where hundreds of people, including some schoolies, were staying.

"We're close to capacity so we turned our two conference facilities into evacuation centres, opened up the amenities," resort director David James has told AAP.

"We hosted a BBQ dinner free of charge. We also turned the sprinkler systems off around the garden and some of the campers pitched their tents there."

He said vessels were travelling to and from the mainland on Monday, but many evacuees were waiting to see what authorities would say about the fire conditions ahead.

The latest warning says campsites on the island could be affected for some days.

Australian Associated Press