A high surf advisory is now in effect for portions of Kaua‘i and Ni‘ihau.
The National Weather Service in Honolulu says the advisory will remain in effect until 6 a.m. Monday.
Surf of 18-24 feet is forecast along north-facing shores of Ni‘ihau and Kaua‘i, with surf along west-facing shores reaching up to 14-18 feet.
Surf along exposed north- and west-facing shores will ease to around the advisory levels through the day as a west-northwest swell that peaked Saturday begins to move out. A new, west-northwest swell arriving by tonight, however, will support advisory-level surf continuing through tonight.
A gradual downward trend is expected late Monday through midweek.
Expect strong breaking waves, shore break and strong longshore and rip currents, making swimming difficult and dangerous. Beachgoers, swimmers and surfers should heed all advice given by ocean safety officials and exercise caution.