The Department of Fisheries says it's not too late for people to register online to get their abalone licence before the season opens tomorrow.

About 5000 recreational abalone fishers are expected to brave big swells along Perth's coast for the first hour of the season.

Nathan Harrison from the Department of Fisheries says the season opens for one hour each Sunday morning for the next six weeks.

"We will have a large number of Fisheries officers out there on the beach making sure people do abide by the rules," he said.

"We certainly want to make sure people are aware of the rules and make sure they do treat the stocks with a sense of personal responsibility."