The National Weather Service has issued a high surf warning for the north-facing shores of Oahu and Maui until 6 p.m. today. The warning also extends to the north- and west-facing shores of Kauai, Molokai, and Niihau.
Ocean water is expected to occasionally sweep across portions of beaches, with very strong break waves and strong longshore and rip currents. Breaking waves may impact harbors making navigating the harbor channel dangerous.
Surf is expected to build up to 20 to 25 feet today, except for the west-facing shores of Molokai, which should see surf up to 15 to 20 feet.