WHHW40 PHFO 210851 CFWHFO Coastal Hazard Message National Weather Service Honolulu HI 1051 PM HST Fri Mar 20 2026 ...HIGH SURF ADVISORY FOR NORTH FACING SHORES OF NIIHAU KAUAI AND OAHU... .A northly swell is building in and will create large surf for north facing shores peaking Saturday afternoon and then slowly declining Saturday night. HIZ001-007-009-029-030-035-212200- /O.NEW.PHFO.SU.Y.0021.260321T1600Z-260322T1600Z/ Niihau-Oahu North Shore-Olomana-Kauai North-Kauai East- Koolau Windward- 1051 PM HST Fri Mar 20 2026 ...HIGH SURF ADVISORY IN EFFECT FROM 6 AM SATURDAY TO 6 AM HST SUNDAY... * WHAT...Large breaking waves rising to 12 to 16 feet. * WHERE...North shores of Niihau, Kauai, and Oahu. * WHEN...From 6 AM Saturday to 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. && $$