Dee Why Beach was closed again on Monday when a shark was spotted in the same location where a surfer was knocked off his board on Sunday.
The Westpac Life Saver Rescue Helicopter flew over Dee Why and surrounding beaches on Monday morning after an off-duty Warringah Council lifeguard, Danny Sheather, was knocked off his board while surfing at the beach about 12.45pm on Sunday.
Stephen Leahy, CEO of the Westpac Life Saver Rescue Helicopter, said the helicopter started sweeping over Sydney’s northern beaches at 8.30am on Monday and soon spotted a 2.5-metre shark at the south end of Dee Why.
They radioed to lifeguards, who sounded the shark alarm and closed the beach to swimming.
‘‘It was very much the same size and colour as the shark we saw yesterday, so it could be suggested that it was the same shark,’’ Mr Leahy said.
‘‘Lifeguards were advised of that and we stayed in the area for quite some time, but the shark wasn’t moving on.’’
He said the helicopter continued north and spotted a shark at North Narrabeen Beach, however the shark soon moved out to sea.
When the helicopter returned to Dee Why the shark had gone, he said.
He said life guards on jetskis were patrolling the area, and a number of surfers had already returned to the water. The beach re-opened about 10am.
The helicopter will sweep over the beaches again on Monday afternoon.
Mr Sheather did not see what hit him but noticed a 30-centimetre chunk out of the bottom of his board when he returned to shore on Sunday.
"It looked like something had come up and rammed him from underneath," Steve Downman, a Warringah Council lifeguard supervisor, said.
Sunday’s incident was the second involving a shark on NSW beaches in a week.
Luke Allan, 29, lost a finger to a shark near Port Macquarie on Friday but said he plans to surf again.
"Absolutely, the first chance I get … I don’t know of anyone that’s been attacked twice."