High surf advisory issued for western shores of Big Island as two swells build down island chain

Forecasters at the National Weather Service office in Honolulu issued a high surf advisory in effect until 6 p.m. Friday (Jan. 30) for west shorelines of the Big Island as two significant northwest swells build down the island chain.

The first moderate to large, long-period northwest swell will peak overnight tonight into early morning Friday, followed by a second overlapping, larger, long-period northwest swell building in Friday and peaking late Friday into Saturday (Jan. 31) before subsiding through the rest of the weekend.

High surf advisory conditions for exposed west-facing shores are the main concern with the first swell’s arrival. The peak of the second swell, however, is forecast to push surf heights possibly above warning levels late Friday through Saturday for some shorelines.

Surf heights are forecast to build to 6 to 8 feet along west-facing shores of the Big Island, causing strong breaking waves and strong currents that will make swimming and other ocean activities in the advisory areas dangerous.

The public is advised to heed all advice from ocean safety officials; remember: when in doubt, don’t go out.

Additionally, a combination of surf and high-than-expected water levels will produce nuisance coastal flooding throughout the state — including the Big Island.

National Weather Service issued a coastal flood statement for all islands in effect through Monday afternoon (Feb. 2).

Visit the Honolulu forecast office website for the most up-to-date weather information, including advisories, watches and warnings.