UPDATE 5:35 p.m.
A high surf advisory is in effect for north- and east-facing shores from Kauai to Hawaii island until 6 p.m. Monday, the National Weather Service said. A high surf warning for north- and east-facing shores of Maui and Hawaii island has been canceled.
Surf along north-facing shores of Niihau, Kauai, Oahu, Maui, and Big Island was expected to reach 16 to 22 feet tonight and subside to 12 to 18 feet Monday. Surf along east-facing shores was predicted to reach 8 to 12 feet tonight and lower to 6 to 9 feet Monday.
A wind advisory for most of the state has been cancelled, leaving a wind advisory in effect for Lanai until 6 a.m. Monday. Northeast winds of 20 to 30 mph with gusts to near 50 mph were expected.
Strong winds were expected across the state today along with some large surf and ocean swells in the eastern half of the islands, the National Weather Service said.
A wind advisory is in effect for all islands until 6 p.m. today, according to the NWS. A strong high pressure north of the state is generating the strong winds.
Northeast winds of 20 to 30 mph with gusts of up to 50 mph are forecast for Niihau, Kauai, Oahu, Molokai, the lower elevations of Maui, Lanai, Kahoolawe, Maui central valley, and downwind of the Kohala Mountains on Hawaii island.
The winds could bring down tree branches and cause isolated power outages, the NWS said.
The cities noted in the advisory include Lihue, Princeville, Poipu, Waimea, Hanapepe, Kokee State Park, Honolulu, Waikiki, Hawaii Kai, Kapolei, Nanakuli, Makaha, Haleiwa, Waialua, Kahuku, Punaluu, Laie, Kailua, Kaneohe, Waimanalo, Mililani, Wahiawa, Pearl City, Makakilo, Kalaupapa, Kaunakakai, Wailuku, Lahaina, Kaanapali, Haiku, Makawao, Hana, Kihei, Makena, Pukalani, Kula, Manele, Lanai City, Kahului, Hilo, Volcano, Honokaa, Kamuela, and Waikoloa.
Large surf was also predicted for north- and east-facing shores of Maui and Big Island, and a high surf warning was in effect for those areas until 6 a.m. Monday. The rough surf should build to 20 to 28 feet along north-facing shores and 8 to 12 feet along east-facing shores. The swell was expected to peak this afternoon before slowly subsiding overnight. Although diminished on Monday, the surf will probably be large enough for a high surf advisory through Monday afternoon, the NWS said.
A small craft advisory was in effect for waters surrounding the state until 6 a.m. Monday as strong winds with rough, elevated seas expected through early Monday. Northeast winds of 20 to 30 knots with higher gusts are expected with seas of 10 to 15 feet. Gale force winds are possible over the Pailolo and Alenuihaha Channels.
The weather service also warned about significant surges in north-facing harbors of Maui and Big Island. The large swells will be generated by a long-period north swell along with a large northeast swell and affect the Hilo and Kahului harbors through early Monday.
The swells and wind waves will likely create “very large breaking waves near the harbor entrances,” the NWS said.
Mariners should exercise caution when entering or leaving port.