Waves hitting NSW after the Tonga volcanic eruption have peaked, the Bureau of Meteorology says, but it's not quite all clear to get back in the water on Monday.
The weather service on Sunday evening confirmed that a hazardous surf warning remained in place for much of the NSW coast as small, unusual waves were expected to continue.
The conditions were "no longer expected to be dangerous".
Surf and swell conditions are expected to be hazardous for coastal activities such as rock fishing, boating, and swimming throughout the day.
Areas impacted include Byron Coast, Coffs Coast, Macquarie Coast, Hunter Coast, Sydney Coast, Illawarra Coast, Batemans Coast and Eden Coast.
NSW SES assistant commissioner Sean Kearns said on Monday the public must stay clear of the water.
"The surf conditions will likely remain hazardous well into tomorrow," Mr Kearns said.
"There is also a chance we could experience severe weather this afternoon, which could only add further dangers," he said.
Surf Life Saving NSW Director of Lifesaving, Joel Wiseman agreed, saying it was important the public was aware of the dangers the conditions posed.
"Surf Life Saving NSW's position is always for the benefit and safety of the public, and while we have remained proactive and operational despite flags being down during the course of the Marine Tsunami Warning, we hope that potential beachgoers understand the risks associated with the hazardous surf conditions," he said.
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"As an organisation, we are rescue ready and have Support Operations actively working across the state to ensure optimal safety on our coastlines, but we still encourage anyone planning to head to the beach this afternoon and into the evening to reconsider."
NSW Water Police say:
- People should consider staying out of the water and avoid walking near surf-exposed areas.
- Rock fishers should avoid coastal rock platforms exposed to the ocean and seek a safe location that is sheltered from the surf.
- Boaters planning to cross shallow water and ocean bars should consider changing or delaying their voyage.
- Boaters already on the water should carry the appropriate safety equipment and wear a lifejacket.
- Boaters should remember to log on with their local Marine Rescue radio base, via VHF Radio or the Marine Rescue APP, and consider their safety management plan.
The Bureau of Meteorology warning is due to be updated at 5pm.