Routine forecast are issued for the Hawaiian Coastal Waters, the Offshore Waters, and High Seas. The Hawai`i Coastal Waters are within 40 nautical miles of the main Hawaiian islands. The Offshore area extends from this 40 nautical mile mark to 240 nautical miles of the main Hawaiian islands. The high seas forecasts are issued for an area that covers approximately 15,000,000 square miles. The high seas area extends as far north as 30N, and as far south as 25S, and between 120W south of the equator and 140W north of the equator to 160E. See Marine Area Map for a graphical representation.
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