A diver has been attacked by a shark in Tasmania.

Police said the 31-year-old man was diving with two others near Cole Point, Adventure Bay when the attack happened.

It is understood they were diving at a depth of about eight metres approximately 50 metres offshore at the time of the attack.

The man from southern Tasmania was able to get to shore with the assistance of the other divers.

Emergency services were contacted about 9.10am on Saturday.

Inspector Darren Latham said it is believed that the shark was a two-metre long broadnose sevengill shark.

He said that the 31-year-old sustained non-life-threatening injuries to his forearm and was taken to the Royal Hobart Hospital in a stable condition.

He was transported by a Westpac Rescue Helicopter.

Coal Point is located on the island of Bruny Island, south of Hobart.

There have been no further sightings of the shark but a police vessel continues to patrol the area.

“While this appears to be an isolated incident, we are reminding anyone planning to swim or dive in the area to remain vigilant, follow local safety advice and be aware of their surroundings,” said Inspector Latham.

The attack comes after a spate of sightings of great white sharks along Sydney’s beaches, which have prompted closures in June and July.

Leah Stewart, 34, was mauled by what is believed to have been a 3.5m great white shark on June 13.

She was swimming less than 30 metres offshore and inside the flags at Sydney’s popular Coogee Beach at the time.

Ms Stewart sustained “severe and life-threatening injuries” and suffered bites to her arms and legs, significant blood loss, and fractures throughout her body.

The 34-year-old has since undergone several surgeries, including an amputation of her arm.

There have been four fatal shark attacks in AUstralia this year.