Port Macquarie is averaging sea surface temperatures about 25 to 26 degrees, one or two degrees warmer than normal for this time of year and will retain some warmth over winter due to a number of weather factors.

A Bureau of Meteorology spokesperson said although sea temperatures would decrease as normal heading to winter, the area was experiencing a warm anomaly.

"In the last month the north-easterly winds have eased and the warm surface water of the East Australian Current has come back into the shoreline," they said.

"This warmth along the coast has been amplified by a particularly strong eddy current moving warm waters southwards down the NSW coast.

"We're also seeing some influence from a broader-scale Tasman Sea marine heatwave which developed in late December.

"Sea temperatures will cool in the coming months, however near Port Macquarie the warm anomaly is expected to persist into winter.

"Absolute temperatures will decrease but they will probably still be warmer than they would normally be for the particular time of year."

This contrasts with January and the first half of February around Port Macquarie which were in the bottom ten per cent of typical temperatures for that time of year.

This was due to persistent northeasterly winds from high pressure in the Tasman Sea, causing coastal upwelling which brought cold deep ocean water to the surface, according to the spokesperson.

Town Beach regular Jacqui Martin, who swims with the Port Macquarie Sunrise Swimmers said the group was attracting around six to 12 people most days for a dip in the water.

"There has been more red weed than usual," she said.

"The temperature differs one day from the other, I don't think it's common for it to be warm for this long.

"Most Sunrise Swimmers go every day and only miss a morning if someone has had an accident or is out of the country.

"A dip in the ocean and a chat is great for everyday health, for the mind especially if you're feeling down."

Visiting tourists from England, Lara Brooks and Odette Ryan said the water seemed to be about average as they travelled along the coast and was bearable.

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