HONOLULU (HawaiiNewsNow) - Forecasters have issued a High Surf Warning for north and west facing shores of Niihau, Kauai, Oahu and Molokai until 6 p.m. Tuesday.
A high surf warning is also issued for north facing shores of Maui and a high surf advisory for west facing shores of the Big Island.
The National Weather Service says a new northwest swell will build Monday afternoon and peak Monday night in most areas, bringing surf above warning levels to exposed north and west facing shores.
The west facing shores of the Big Island will see surf increasing above advisory levels tonight remaining so through Tuesday night.
Forecasters say surf along north facing shores will build to 20 to 30 feet. Surf will reach 15 to 20 feet along west facing shores.
Forecasters said swimmers and surfers should exercise caution and heed advice from ocean safety officials and lifeguards. Meantime, boaters could expect recreational surfers and bodyboarders using harbor channels to access surfing areas.