HONOLULU (HawaiiNewsNow) - A High Surf Warning will go into effect at 10 a.m. Thursday for north and west facing shores of Kauai and Niihau and north facing shores of Oahu, Molokai and Maui, and west facing shores of the Big Island.
The National Weather Service say that a strong low pressure system in the northwest Pacific has generated a large west-northwest swell that will fill in across Hawaii waters late tonight.
The swell will produce large and hazardous surf along exposed shorelines tomorrow through Friday. Due to the westerly direction of the swell, select west facing shores of the Big Island will see much larger than normal surf.
- Surf: 20 to 30 feet with larger more frequent sets to 30 to 35 feet on Kauai and Niihau.
- Timing: surf will begin building rapidly on Kauai and Niihau Thursday morning then spread eastward to Oahu Molokai and Maui through the remainder of the afternoon and evening hours.
- Impacts: High, expect Ocean Water occasionally sweeping across portions of beaches, very strong breaking waves and strong Longshore and Rip currents. Breaking waves may occasionally impact harbors making navigating the harbor channel dangerous.
A High Surf Advisory is also in effect for west facing shores of Oahu, Molokai, Lanai and Kahoolawe.