WHHW40 PHFO 220113 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 313 PM HST Sat Mar 21 2026 ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI AND OAHU... .A northerly swell will continue to produce borderline advisory level surf for north-facing shores through the rest of this evening, then gradually decline overnight. HIZ001-007-009-029-030-035-221415- /O.CON.PHFO.SU.Y.0021.000000T0000Z-260322T1600Z/ Niihau-Oahu North Shore-Olomana-Kauai North-Kauai East- Koolau Windward- 313 PM HST Sat Mar 21 2026 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM HST SUNDAY... * WHAT...Large breaking waves of 10 to 15 feet. * WHERE...North facing shores of Niihau, Kauai, and Oahu. * WHEN...Until 6 AM HST Sunday. * IMPACTS...Moderate. Strong breaking waves and strong currents will make swimming dangerous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all advice from ocean safety officials. When in doubt, don't go out. && $$