Update: High surf advisory extended for south-facing shores of Big Island, elsewhere

July 15 7 a.m. update: The high surf advisory has been extended through Tuesday morning.

A large, long period south swell (190 degrees) will peak this morning and produce advisory level surf along south-facing shores. This swell will gradually decline Tuesday through Friday.

Original post: The National Weather Service has issued a high surf advisory for south-facing shores of the Hawaiian Islands.

The advisory is in effect from 6 a.m. Sunday through Monday evening.

“The current long-period south swell will build in, with surf increasing to advisory levels on Sunday, and persisting Monday,” a National Weather Service alert reads.

Large breaking waves are anticipated building Sunday to eight to 12 feet. Strong breaking waves and strong currents will make swimming dangerous.

“Heed all advice from ocean safety officials,” the National Weather Service said. “When in doubt, don’t go out.”