The National Weather Service at 3:57 a.m. issued a high surf advisory for north facing shores of Oahu and Maui and north and west facing shores of Niihau, Kauai and Molokai until 6 a.m. tomorrow.

A combination of strong north to northeast facing winds and a large north-northeast swell will lead to dangerous surf along exposed north and west facing shores.

Officials expect surf to be between 6 and 10 feet this morning, rising to 15 to 20 feet by this afternoon before dying down by tomorrow.

Beachgoers, swimmers and surfers are urged to heed all advice given by Ocean Safety officials and exercise caution, as strong breaking waves and rip currents could make swimming difficult and dangerous.