(BIVN) – The National Weather Service in Honolulu has issued a High Surf Warning, which is in effect until 6 a.m. Monday. The High Surf Advisory is no longer in effect.

Surf heights along south facing shores will be 10 to 15 feet through late tonight, forecasters say, then lowering to 8 to 12 feet on Monday.

“Expect ocean water occasionally sweeping across portions of beaches, very strong breaking waves, and strong longshore and rip currents,” the National Weather Service says. “Breaking waves may occasionally impact harbors making navigating the harbor channels dangerous.”

“Exercise extra caution entering or leaving harbors along the affected coasts and watch for surfers near the harbor channels,” a Marine Weather Statement reads.

The most dangerous time along the coast is during periods of high tide forecast to occur around 3:00 p.m. Sunday afternoon, Hawaiʻi County Civil Defense says.

In a radio message issued Sunday morning, civil defense said:

• Oceanfront residents and beachgoers along the exposed south facing shores of Hawaii Island from Cape Kumukahi to Keahole Point are advised to be on the alert for high and dangerous surf.
• Inexperienced persons should remain off beaches and adjacent beach front areas.
• Fishermen should pay close attention to the surf.
• Boat owners and oceanfront residents should take action to secure their property.
• Closures of roads and beaches may occur at any time.