A high surf advisory has been posted for north-facing shores of the Big Island through 6 p.m. Sunday.
A north-northwest swell is expected to build Saturday and gradually subside on Sunday, according to the National Weather Service in Honolulu. Forecasters cautioned that northerly winds will make conditions particularly rough and choppy.
The surf is forecast to range in height from 10 to 15 feet at north-facing shores along the island’s northern and eastern coasts, according to the service.
The service categorized the surf’s impact as “moderate,” noting that the public should expect strong breaking waves, shore break and strong longshore and rip currents that can make swimming difficult and dangerous. Beachgoers, swimmers and surfers are urged to heed all advice given by ocean safety officials.