Police search for man lost in Sydney lake

Officers searched the water without success and police divers have been called in.

It comes after a woman aged in her 40s died after being pulled from rough waters at a beach on NSW's Mid North Coast earlier on Monday.

Emergency services were called to Park Beach at Coffs Harbour about 12:50pm after reports an unconscious woman had been pulled from the water. 

Witnesses tried to save the woman before police and paramedics arrived and treated her, however she died at the scene.

Police are investigating the circumstances around the incident and a report will be prepared for the coroner.

Dangerous surf and abnormally high tides has closed popular beaches on NSW's Coffs coast, as Tropical Cyclone Seth loomed.