SEAL BEACH, CA — Steer clear of the ocean water this week, Seal Beach — the National Weather Service issued a surf advisory for the entire Orange County coast due to dangerous surf conditions.

Residents can expect five to nine-foot waves Thursday and Friday, the National Weather Service said.

“A High Surf Advisory means that high surf will affect beaches in the advisory area producing localized beach erosion and dangerous swimming conditions,” the NWS said.

Inexperienced swimmers were urged to steer clear of the waves until the advisory expires after 10 p.m. Friday.