Hazardous surf warning in place as NSW coast hit with 11-metre swell

Hazardous surf warning in place as NSW coast hit with 11-metre swell

People across NSW are being urged to stay out of the water this weekend with a one-in-50-year event bringing powerful winds, dangerous surf, and the risk of coastal erosion across the state's coastline.

Last night, the coastal low stirred up 100km/h winds and an 11-metre swell, with a coastal hazard warning continuing to stretch down from Forster to past Eden.

The hazardous surf warning is set to remain in place for the rest of the day, bringing dangerous surf forecasts, cold temperatures and powerful winds.

READ MORE: 'By far the worst, the most scary': Tropical Cyclone Narelle makes landfall in third stateThe conditions are set to bring cold temperatures, powerful winds and dangerous surf forecasts.

"Our concern is that those conditions that we are predicting may exceed our ability to safely respond and affect a rescue," Brent Manieri from Surf Lifesaving NSW said.

The Bureau of Meteorology said the low is expected to move slowly east into the Tasman Sea and weaken during Saturday evening.

"Wind gusts can be 40 per cent stronger than the forecast, and even stronger in squalls and thunderstorms," the bureau said.

"Maximum waves can be twice the forecast height."

Marine Rescue NSW Acting Superintendent Commander Dan Duemmer described the coast as a "no-go zone" this weekend.

While the conditions are expected to ease, close to 100 flights were cancelled to and from Sydney Airport last night.

READ MORE: Israel warns attacks on Iran 'will escalate and expand' as Trump claims advances in ceasefire talksCancelled flights at Domestic Airport.

The ferry between Manly and Circular Quay has also been cancelled until at least Sunday morning due to rough conditions.

The system also impacted travel in Melbourne, with more than 40 flights cancelled last night.

All flights at the airport have resumed this morning.

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