WA's first shark barrier will return for at least the next three summers.

The City of Cockburn agreed last night to pay $85,000 a year to continue the trial of the Eco Shark Barrier at Coogee beach until November 2017. It is negotiating with the State Government to help pay the bill.

The barrier was installed for a trial from December to April after a series of shark attacks off the WA coast.

It was deemed a success, with no reported damage to marine life and positive feedback from swimmers.

The barrier at Coogee beach is expected to be reinstalled next month.