A northwest swell forecast to hit the Hawaiian islands tonight is expected to bring advisory-level surf to most islands.

Scheduled to go into effect at midnight, a high surf advisory is scheduled for the north- and west-facing shores of Oahu, Kauai, Molokai and Niihau, and the north shore of Maui. The advisory is set to expire at 6 a.m. Friday.

Surf up to 12 to 16 feet is expected along most north- and west-facing shores, except for the west-facing shores of Oahu and Molokai, which are expected to see 8- to 12-foot surf, according to officials at the National Weather Service.

Beachgoers are advised to heed advice from ocean safety officials.