Following advice that hazardous surf conditions can be expected for much of the NSW coastline this week, Surf Life Saving NSW is urging the public, particularly rock fishers and boaters, to exercise caution.

The Bureau of Meteorology issued the warning as large swells have been the catalyst for several big rescues in Sydney as well as up and down the coast.

Read more:

While the swell tapered slightly on Tuesday, it is expected to pick up again on Wednesday, September 8, with cyclone-like conditions of three to four metre swells and a longer than average 14 to 16 second swell period.

For context, the length of time between waves is a good indication of the wave power.

It is anticipated that this will result in more powerful waves breaking in deeper water.

Conditions will be hazardous for coastal activities such as surfing and swimming, but particularly for boating and rock fishing on exposed and south-facing headlands.

Read more:

SLSNSW Director of Lifesaving Joel Wiseman is urging the those who live on the coast to exercise caution.

"In anticipation of the release of our NSW Coastal Safety Report for 2021 tomorrow, I would encourage people to consider staying out of the water and avoid taking unnecessary risks," he said.

"As we have seen in past years, the report will be reflective of an overrepresentation of males being caught in situations they are not prepared for or undertaking risky behaviour.

"I would strongly suggest that at all times, but particularly in these conditions, you understand your limits.

"People are strongly urged to check BeachSafe and understand your limitations if you do decide to take to the water."

Surf Life Saving NSW club call-out teams, Duty Officers and surf rescue assets are on standby to respond to critical coastal incidents, despite it being off-season.

HAZARDOUS SURF CONDITIONS SAFETY TIPS

We depend on subscription revenue to support our journalism. If you are able, please subscribe here. If you are already a subscriber, thank you for your support.