Hawaii Braces for High Surf and Coastal Flooding as Advisories Issued

The Hawaiian Islands are experiencing significant wave activity, prompting high surf advisories for many north and west-facing shores. Residents and visitors are urged to exercise caution due to dangerous conditions, including strong currents and large breaking waves. Coastal flooding is also a concern, particularly during high tide cycles.

Key Takeaways

• High surf advisories are in effect for north and west-facing shores across most of the Hawaiian Islands.
• Waves are expected to reach heights of 10 to 16 feet.
• Dangerous swimming conditions, including strong currents, are anticipated.
• Coastal flooding is occurring in low-lying areas, exacerbated by high tides.
• Advisories have been extended through the New Year’s holiday period.

High Surf Conditions

A series of overlapping northwest and north-northwest swells are generating large waves, with surf heights ranging from 10 to 16 feet along northern shorelines and 8 to 12 feet on western shores. These conditions are expected to persist through the New Year’s Eve period and into early January. The National Weather Service has issued high surf advisories for the north and west-facing shores of Niʻihau, Kauaʻi, Oahu, Molokai, and Maui, as well as the north shores of the Big Island.

Dangerous Ocean Activity

Ocean safety officials are strongly advising the public to stay out of the water in the affected areas. Strong breaking waves and powerful currents pose a significant risk to swimmers and surfers. The mantra "when in doubt, don’t go out" is being emphasized to prevent accidents.

Coastal Flooding Concerns

In addition to the high surf, a coastal flood statement has been issued for vulnerable low-lying coastal areas across all islands. This is attributed to peak monthly high tides coinciding with higher-than-predicted water levels. Minor flooding is expected along shorelines and in low-lying coastal zones, particularly around the early morning high tide cycles. Residents are advised to take precautions, such as moving valuables to higher ground and avoiding driving through flooded roadways. Saltwater inundation and minor coastal erosion are also possible.

Sources

• UPDATE: Coastal flooding advisory for Kauaʻi, Niʻihau through Saturday night : Kauai Now, Kauai Now.
• High surf advisory covers most Hawaii north, west shores, Honolulu Star-Advertiser.
• UPDATE: Coastal flooding advisory for Kauaʻi, Niʻihau through Saturday night : Kauai Now, Kauai Now.
• UPDATE: Coastal flooding advisory for Big Island extended through Saturday night : Big Island Now, Big Island Now.