Organisation for the Rescue and Research of Cetaceans in Australia (ORRCA) spokesperson Jools Farrell said members are certain it's the same seal which was seen at Dunbogan on Tuesday, September 3.

Leopard seals, Ms Farrell said feed during the night and then rest in the day on beaches.

Ms Farrell said it's possible the seal could stop in at a Port Macquarie beach on Thursday, September 5.

ORRCA is reminding people to keep well away of the animal, which can be dangerous.

Ms Farrell said the seal species is very vicious and second only to that of an Orca Whale.

She warned members of the public to keep at least 40 metres away from a leopard seal if they see one.

She said it's important people never stand between the animal and the water, as they might perceive it as a threat.

It's not uncommon for leopard seals to be seen on the NSW coastline at this time of year and ORRCA has received numerous reports of sightings.

On Monday, September 2 a Tuncurry couple came across a leopard seal on Nine Mile Beach.

For more information about ORRCA and seals, please visit the organisation's Facebook page.

Report all injured or distressed whales, dolphins, seals and dugongs by calling the 24 hour hotline on (02) 9415 3333.