High Surf Advisory: Niihau; Kauai Southwest; Waianae Coast; Kahoolawe; Maui Leeward West; Kona; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Molokai Leeward South; Lanai Leeward; Lanai South; Maui Central Valley South; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast

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High Surf Advisory — Niihau; Kauai Southwest; Waianae Coast; Kahoolawe; Maui Leeward West; Kona; Kauai South; East Honolulu; Honolulu Metro; Ewa Plain; Molokai Leeward South; Lanai Leeward; Lanai South; Maui Central Valley South; South Maui/Upcountry; South Haleakala; Big Island South; Big Island Southeast Severity: Minor. Certainty: Likely. ...HIGH SURF ADVISORY FOR SOUTH FACING SHORES THROUGH THURSDAY NIGHT... .Forerunners from a moderate, long-period south swell are already reaching Hawaii this afternoon. The swell builds tonight into Thursday, with surf increasing to advisory level along south- facing shores sometime on Thursday. Thursday night into Friday, the swell may peak near warning level. Long-period south swell energy will keep surf elevated beyond Friday, which may require the advisory to be extended through the weekend. * WHAT...Surf 8 to 12 ft. * WHERE...South facing shores of all Hawaiian Islands. * WHEN...From 6 AM Thursday to 6 AM HST Friday. * IMPACTS...Moderate. Strong breaking waves and strong currents will make swimming dangerous.