A large northwest swell will bring dangerously large surf to the Hawaiian islands starting Wednesday.
The National Weather Service has issued a High Surf Warning for north- and west-facing shores of Niihau, Kauai, Oahu and Molokai, and for north-facing shores of Maui. The warning will be in effect through 6 p.m. Thursday.
Surf is expected to rise to 20 to 25 feet, forecasters said.
A High Surf Advisory has also been issued for west-facing shores of Oahu and north-facing shores of the Big Island until 6 p.m. Thursday. Surf along north-facing shores will rise to 10 to 15 feet.
Expect strong breaking waves that may be dangerous for swimmers.