More beaches have closed after a great white shark was detected offshore following a nearby fatal attack on a surfer.

Manly and Freshwater beaches on Sydney's northern beaches were closed on Monday following the detection offshore about 10.50am.

The shark had last been detected near Soldiers Beach on the Central Coast in June, having been tagged in 2023 at Coffs Harbour.

Dee Why and Long Reef Beach have not reopened following a fatal attack on Saturday morning which killed local surfer Mercury Psillakis.

The 57-year-old had been alerting other surfers to the shark before he was attacked, Dee Why local and former pro surfer Toby Martin said.

"Unfortunately, he was the last one furthest out to sea and ultimately paid with his life," he told Nine's Today program on Monday.

"But it's imp

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