A giant swell will generate large surf for north and west shores of some of the islands this week, forecasters say.
The National Weather Service has issued a High Surf Advisory for north- and west-facing shores of Oahu, Kauai, Molokai and Niihau. A High Surf Advisory is also in effect for north-facing shores of Maui and the Big Island.
The High Surf Advisories are in effect until 6 p.m. Friday.
Surf along north-facing shores of Maui and the Big Island will reach 12 to 18 feet, while surf along north-facing shores of Oahu, Molokai, Kauai and Niihau will be 10 to 15 feet. Surf will be 8 to 12 feet along west-facing shores.
A distant storm several days ago is responsible for the above-normal swell, NWS said. Another approaching swell could bring warning-level surf of up to 25 feet to the islands by the weekend, forecasters added.
Forecasters said beachgoers should expect strong breaking waves, shore break and strong longshore and rip currents, making swimming difficult and dangerous.