Humboldt Bay Communities Face Coastal Flood Risk November 7–10 as High Tides and Surf Build

EUREKA / HUMBOLDT BAY — November 7, 2026. National Weather Service forecasters warn that high astronomical tides and above-normal water levels could produce minor coastal flooding around Humboldt Bay from November 7–10, with additional wave hazards on exposed North Coast beaches.

Why water levels could rise

A November 6 weather discussion from NWS Eureka described predicted astronomical tides near 7.4–7.5 feet at North Spit. Winds and other tidal anomalies could push observed water levels higher, potentially approaching or exceeding a local advisory threshold near 8.8 feet. Forecast totals are estimates, not guaranteed measurements at every shoreline location.

Dangerous surf is a separate problem

The agency also issued a High Surf Advisory for Sunday, November 8, from 4 a.m. to 10 p.m., affecting coastal Del Norte, Humboldt and Mendocino areas. The advisory described possible 22–24-foot breaking waves at exposed beaches. Visitors should avoid jetties, steep shoreline areas and places where waves can surge much farther inland than expected.

How residents should prepare

Low-lying waterfront businesses and residents can move vulnerable objects away from the shoreline, secure boats according to harbor rules and monitor local transportation notices. Drivers should never cross flooded roadways. A forecast of potential flooding is not evidence that streets are already under water. Check the latest National Weather Service and local emergency agency notices before travelling or entering coastal areas.

Sources: National Weather Service Eureka, November 6 forecast and alert. California58 report prepared November 7, 2026.

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