The warning has been issued for the coastline between Batemans Bay and Coffs Harbour, and is particularly timely given that it’s expected to coincide with a king tide today.

Although not as large as swells of recent weeks, the forecast conditions are still expected to pack a punch.

Peaks of over two metres are expected in some areas.

“There’s going to be a huge amount of moving water which can potentially cause even the most experienced swimmers to get into difficulty. With it being the school holidays and still reasonably warm weather it is very important that people are aware of the conditions,” NSW Lifesaving manager Matt du Plessis said.

“This season we’ve had a number of tragic drownings at our beaches and many rescues involving people getting caught in rip currents, and all of these incidents are a sobering reminder of the power of the ocean.

“Please take note of the safety warnings and if you have any doubt whatsoever about your ability to handle the water it’s better not to go in,” he said.

Beachgoers need to be particularly aware of the long period swell of between 13-15 seconds expected right along the coast with fishers in particular urged to exercise caution when getting on and off exposed rock platforms, wear a life jacket, and to never turn their back on the ocean.

Volunteer surf lifesavers and lifeguards will be out in force throughout the NSW School Holidays. Flags will come down on the 2017/18 season following the last official day of patrol on Sunday April 29.

General safety tips during hazardous surf conditions: 

 Avoid rock fishing and water activities on exposed beaches/rock-shelves

 Only swim at patrolled beaches, between the red and yellow flags. See www.beachsafe.org.au for patrolled locations/times          

Check the official Bureau of Meteorology (BOM) forecast before undertaking rock fishing and water activities  

 Boaties should seek advice from Marine Rescue NSW and always wear a life jacket 

 If witnessing an in-water emergency dial Triple Zero – Police.