"We've had pieces of the boat wash up on beaches from North Wollongong all the way up to Coledale," Mr Davies said.

He said many of the pieces comprised the hull of the boat.

"It's a carbon fibre hull with a foam composite. There's two layers of carbon fibre and in between there is foam.

"The fibre is quite heavy but it's attached to this foam core and floats very well. It's also sharp and jagged. It's the stuff that will cut you up."

Police were contacted and the lifesavers instructed to make a stockpile of the parts in preparation for collection.

Debris continued to be collected along the coast throughout yesterday, with large pieces found at Fairy Meadow and Sandon Point beaches.

Mr Davies said surf-lifesavers were using IRBs to spot the debris but were unable to approach for fear of damaging the vessel.

"We have to be careful because it's that sharp it will cut up the IRB," he said.

"If any of it washes in to the surf zone we're closing the flags while it's cleared from the surf zone."

No injuries to swimmers were reported.

"The lifesavers have been very vigilant. They're right on it," Mr Davies said.

"They're talking to people who are walking along the beach and swimming, just explaining what it is.

"People are worried, seeing boat wreckage come up on the beach. So we're explaining what happened yesterday and the tragedy of the whole thing."

Mr Davies said strong surf, including rips, had also forced beaches to close throughout much of the weekend.