SA surfer Simon said there had been ample time to find a window of favourable weather and light winds to access and fix the buoy, located off the island's south-west coast.
"I'm not sure what kind of dog and pony show they're running at the bureau, but seven months to repair a wave buoy is entirely indefensible,"Simon said.
"One of the parts for the replacement system is a specialist mooring sourced from Canada, which the bureau understands experienced a supply issue and has recently been resolved,"she said.
"This will provide good baseline data about coastal waters that has been lacking, and there has never been a better time to have more information about this stretch of ocean."