As storm cells took hold of Sydney on Wednesday, with a warning of hazardous surf, Collaroy residents braced for a repeat of the eight-metre swells which swept parts of their homes away in a disastrous king tide in 2016.

For Tony Cargorski, Wednesday's wild weather caused "really big waves" and a sense of "deja-vu" after he lost metres off his multimillion-dollar property in the disaster two years ago.

"The whole backyard was gone, the living area was gone, deck gone and the house was almost tilted over," he said.

The aftermath of the Collaroy 2016 king tide. Credit:DEAN LEWINS

A repeat of the 2016 king tide which eroded huge sections of his and his neighbours' beachfront properties is "always on our minds" he said.