It is believed he was attacked during an altercation after leaving the water.
He was taken to Coffs Harbour Base Hospital for treatment, where he later died.
As investigations continue, strike force detectives are appealing to identify a man riding a bicycle in the area at the time of the incident.
They are also appealing for witnesses â or anyone who may have dashcam footage â in the vicinity of the Coffs Harbour Surf Club and the Orlando Street area at the time of the incident.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000.
