The Bureau of Meteorology (BOM) is warning of waves in excess of five metres in the surf zone across NSW and in Queensland a hazardous surf warning is in place for Fraser Island Coast, Sunshine Coast and Gold Coast Waters.

The conditions may cause damage and coastal erosion between Ulladulla and Port Macquarie throughout the morning.

The large seas are being generated by the interaction between a deep low pressure system near New Zealand and a high pressure system over southeastern Australia with a ridge to the south.

Rock fishers, swimmers, surfers, and recreational boat users are being urged to exercise caution in the water this weekend.

Offshore conditions are likely to be significantly stronger while southern facing beaches and exposed rock platforms are expected to bear the brunt of the weather.

At this stage it is anticipated the hazardous swell conditions will continue well into Sunday before gradually easing into next week.

The NSW BOM has issued a number of warnings:

Rock fishers in particular are encouraged to wear a lifejacket and be aware of the swell period, especially as they get on and off exposed rock platforms.

SLSNSW Lifesaving Manager Matt Du Plessis is urging the public to be aware of the changing conditions.

“It’s important that anyone looking to head to the beach this weekend is aware of these hazardous conditions and factors it into their planning.

“A great first port of call is the BeachSafe App or website which provides an overview of all patrolled beaches, beach closures and other important safety information which is particularly handy in winter,” said Mr Du Plessis.

“While we do have emergency assets on call, it does take time for them to get to you, so if you have any doubt about your abilities to handle the conditions it’s safer not to go out.”