Wind gusts of up to 60 to 65 kilometres per hour are expected to batter the Port Macquarie coastline with the Bureau of Meteorology issuing a two-day marine wind warning.
The bureau predicts offshore wind gusts could peak even higher at 70 to 80km/h.
A wind warning and hazardous surf warning have been issued for Monday and Tuesday for the Macquarie coastline.
Meteorologist with weatherzone Brett Dutschke says Monday is likely to be the windiest day of the two.
"Showers are also likely to develop on Monday evening," he said.
"Those showers will not just be confined to the coast with a chance they will also develop on the hinterland areas.
"By Tuesday these showers will become more confined to the coast before becoming light and infrequent.
"The total rainfall for the two days is likely to be around five millimetres," he said.
Mr Dutschke said some areas may also miss out completely.
The forecaster said winds will comfortably reach 40kmh on Monday with gusts peaking at 60 to 65kmh at times.
"Offshore those gusts could reach as high as 70 top 80kmh," he added.
Offshore those gusts could reach as high as 70 top 80kmhBrett Dutschke
Mr Dutschke said a low pressure system sitting offshore was combining with a front to bring the burst of wind and showers.
He said the slow moving front was responsible for high winds on Friday.
More rainfall was likely if the south to southwesterly winds shifted offshore.
NSW Police have advised people to stay out of the water and avoid walking new surf-exposed areas while rock fishers should also avoid coastal rock platforms exposed to the ocean.
"Seek safer locations that are sheltered from the surf," the police said.
Mr Dutschke said people should stay away from the water until at least Wednesday afternoon, and to regularly check weather updates.
Monday's maximum temperature will top 19 degrees with Tuesday's temperature range from five to 18 degrees.
Wednesday's temperature range will be six to 20 degrees.
Port Macquarie's average for September is 22 degrees. It is likely to warm up again by Thursday.
Patrolling of local beaches commences on Saturday September 28 across Port Macquarie-Hastings beaches.
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