MONTEREY  (AP) — Officials warn boaters and beachgoers to be especially careful of high tides along the California coast.

Mark Strudley of the National Weather Service in Monterey said that he expects high tidal activity through Tuesday. He said it will peak Monday, with the likelihood of flooding at low-lying areas along the coast.

Strudley says the so-called King Tide is cause by the earth’s alignment with the sun and moon, creating some of the most extreme swells of the year.

He warns people that coastal lagoons, trails and parking lots may flood.

Capt. Greg Stump, commander of the Coast Guard Sector San Francisco, says swells could rise to around seven feet.

He warns marinas and boat owners to check their moorings and to be careful.