HONOLULU (HawaiiNewsNow) - The National Weather Service has issued a High Surf Warning for all north and west facing shores of Oahu, Kauai, Niihau and Molokai, and the north facing shores on Maui.
A High Surf Advisory is also in effect for all west facing shores of the Big Island through Thursday.
According to forecasters, an extra large northwest swell will peak Wednesday then slowly subside.
Surf will peak between 25 and 35 feet on north and west facing shores of Kauai and Niihau, and the north facing shores of Oahu, Molokai and Maui. Peak surf along the west facing shores of Oahu and Molokai will be 18 to 22 feet.
Forecasters say coastal flooding may occur around the time of high tide on Wednesday.
The public is advised to stay well away from the shoreline in the affected areas and should be prepared for possible road closures.
The High Surf Warning remains in effect until 6 p.m. Thursday.