We could see the biggest surf swell so far this season Friday.
A high surf warning is in effect for north- and west-facing shores of Niihau, Kauai, Oahu, and Molokai, and north-facing shores of Maui.
The warning is in effect until 6 p.m. Saturday.
A very large northwest swell will build Thursday night and peak on Friday, producing dangerous surf conditions along most north- and west-facing shores, and advisory-level surf along the west-facing shores of Hawaii Island.
Surf along north-facing shores is expected to rapidly build to 30-40 feet Friday morning, then lower to 20-25 feet on Saturday, and decline though the weekend.
No word yet if waves will be big, or clean, enough for the Quiksilver in Memory of Eddie Aikau Invitational.
Expect ocean water surging and sweeping across beaches, coastal benches, and lava flows creating the potential for impacts to coastal properties and infrastructure, including roadways. Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling.
These dangerous conditions mean that only the highly experienced should enter the water. The general public should remain off beaches and adjacent beachfront areas. Large breaking surf, significant shorebreak, and dangerous currents make entering the water very hazardous. Anyone entering the water could face significant injury or death.