Tasmania Fire Service said on Christmas Day, a drone being flown near the fire forced the grounding of firefighting aircraft.

Tasmania Police said the drone operator put lives at risk, and that flying drones near bushfires could be an offence under the Civil Aviation Safety Authority.

The bushfire began in the early evening on Christmas Eve, with about 100 people evacuated to Alonnah during the night.

Volunteer crews from South and North Bruny Island responded to the incident, with support from a number of firebombing aircraft.

SEE ALSO: Emergency services evacuate Cloudy Bay due to bushfire threat

During the early hours of Christmas morning conditions worsened with strong winds pushing the fire East towards Prices Lookout.

The fire went to an Emergency Warning Alert level.

Weather conditions over the coming days are favourable for fire crews.

At 10.32am on Wednesday, all areas of the island were accessible aside from Conleys Point, Cloudy Bay, and the camping areas.

As of Wednesday afternoon the fire had burnt about 120 hectares with a nine-kilometre perimetre, with 30 to 40-metre flames.

For more information, visit www.fire.tas.gov.au.