A strong storm system in the Southern Ocean will bring swells as high as 7 metres off Australia's southern coastline ahead of the weekend, creating dangerous conditions for fishing, surfing and boating.
The "very large south-west swells" are expected to hit Victoria, Tasmania and South Australia on Friday before easing on Saturday.
Tragedy had already struck South Australia during the Easter break when a father and daughter were swept off rocks at the Whaler's Way Sanctuary at Cape Carnot, south of Port Lincoln, on Sunday.
"Although it is inviting, just be conscious not to get out there and take too many risks."
He urged people to be careful when fishing from rocks because an unexpected wave could lead to tragedy.
Surf Life Saving SA chief executive Damien Marangon said crews would be ready to respond to any emergency if needed.
"Things can change quite quickly and dramatically and with the swell that's predicted, there may be some people attracted to that," he said.
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