Snorkeller dies on NSW South Coast

A man has died after experiencing difficulties snorkelling on the NSW South Coast, during a horror few days in the nation's waters.

Six people have died snorkelling or scuba diving in Australia since Wednesday.

A man in his 40s was snorkelling with two people on Sunday when he got into trouble and was assisted onto a boat off Congo, NSW, around 10.30am.

Paramedics tried to treat the man at Preddy's Wharf, Moruya, but he died on the scene.

The same day a diver died in Melbourne and a Tasmanian man was found unresponsive by diving companions on Saturday.

The incidents at the weekend come after two elderly French tourists died snorkelling north of Cairns on Wednesday and a 60-year-old Englishman died during a diving trip north of Port Douglas on Friday.