The National Weather Service issued a high surf advisory for north- and west-facing shores of Niihau and Kauai, and north-facing shores of Oahu, Molokai and Maui this morning, in effect until 6 p.m. tomorrow.
A large, northwest swell will continue to build today and tonight, according to the NWS, bringing advisory level surf of 10 to 15 feet to exposed north- and west-facing shores. A reinforcing north-northwest swell, meanwhile, will build Tuesday and peak Tuesday night, enhancing already dangerous surf along the exposed north- and west-facing shores.
Expect strong, breaking waves and strong rip currents, making swimming difficult and dangerous.
A gale watch is also in effect for Alenuihaha channel, Maalaea Bay and Maui’s leeward side due to strong winds filling in behind a passing cold front from Tuesday morning through Tuesday afternoon.