Update: High surf advisory once again extended for south-facing shores

7:36 a.m. update on July 16: A high surf advisory for south-facing shores of the Hawaiian Islands was extended through 6 p.m.

The current long-period south swell (180-190 degrees) will maintain near to slightly above advisory level surf through the morning hours and into the afternoon. The swell is expected to decline below advisory levels by tonight.

According to the National Weather Service in Honolulu, large breaking waves of 8 to 12 feet are expected early this morning, then declining to 7 to 10 feet this afternoon.

Impacts will be moderate. Strong breaking waves and strong currents will make swimming dangerous.

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.”