The National Weather Service has issued a high surf warning for north and west facing shores of Niihau, Kauai, Oahu, Molokai and north facing shores of Maui and Hawaii Island.
A large north-northwest swell will build rapidly Monday, bringing warning level surf of 30 to 40 feet along north and west facing shores of Niihau, Kauai and Molokai, and north facing shores of Oahu and Maui, and surf 20 to 30 feet along west facing shores of Oahu and north facing shores of Hawaii Island.
The surf will rise rapidly Monday morning across Kauai, reach Oahu and Maui county by midday, and then Hawaii Island in the evening.
Expect the water to occasionally sweep across portions of beaches, with very strong breaking waves and strong longshore and rip currents.
Breaking waves may occasionally impact harbors, making the navigation of the harbor channel dangerous.
These dangerous conditions mean that only highly experienced persons should enter the water. Inexperienced persons 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.