HUNTINGTON BEACH, ­Calif. — Seawater spread into several low-lying communities along the California coast Thursday morning as unusually high ‘‘king tides’’ pulled the ­Pacific Ocean farther ashore than normal.

Causing some damage but mostly just making a nuisance, water flooded Pacific Coast Highway and side streets in Sunset Beach, a sliver of Huntington Beach between the ocean and a yacht harbor. Down the Southern California coast, Newport Bay was brimming, while just north of San Francisco the tide swamped a commuter parking lot in Marin City and seeped into dozens of cars.