California's coastline on alert as King Tides fuel prolonged flooding from San Francisco to San Diego

Record-high tides have been observed in Los Angeles, while coastal flooding is expected from San Francisco south to San Diego.

THE TAKEAWAY: 

  • Portions of the California coastline are seeing higher-than-normal King Tides.
  • In Los Angeles, San Diego and Santa Monica, water levels have already exceeded 2.50 feet.
  • Coastal Flood Advisories and warnings are in effect from San Francisco south to San Diego.

While the Southeast coast is getting slammed with coastal flooding as peak fall King Tides combine with persistent northeasterly winds push seawater onshore, another region of the U.S. is experiencing a similar weather phenomenon.

WHAT IS COASTAL EROSION AND WHY IS IT DANGEROUS?

Portions of the California coastline are seeing higher-than-normal King Tides, which are expected to last through Thursday.

Record-high tides have been observed in Los Angeles, while coastal flooding is expected from San Francisco south to San Diego.

HOW TO WATCH FOX WEATHER

In Los Angeles, San Diego and Santa Monica, water levels have already exceeded 2.50 feet.

Coastal Flood Advisories and Warnings are in effect from San Francisco south to San Diego due to the threat of continued coastal flooding.

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A surfer crosses a parking lot on E. Ocean Blvd. after exiting Alamitos Bay Dredging operations continue as a King Tide comes ashore in the Balboa Peninsula, Long Beach, CA on Monday, Oct. 26, 2026.  (Robert Gauthier)

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Dredging operations continue as a King Tide comes ashore in the Balboa Peninsula, Long Beach, CA on Monday, Oct. 26, 2026.  (Robert Gauthier)

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Michael Koury stands near his classic Volkswagen Beetle in a flooded garage on Bay Shore Avenue as a King Tide comes ashore in the Balboa Peninsula, Long Beach, CA on Monday, Oct. 26, 2026.  (Robert Gauthier)

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Dredging operations begin along the Long Beach coast.   (Robert Gauthier)

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King Tide comes ashore in the Balboa Peninsula. (Robert Gauthier)

A King Tide is the highest naturally occurring high tide of the year. Even on clear, sunny days with no storm in sight, these extra-high seasonal tides can push seawater back up through storm drains and onto coastal streets.

Unlike Florida and the Southeast coast, King Tides on the West Coast are driven by astronomical factors, as well as seasonal changes in water temperatures.

WHAT IS A KING TIDE OR PERIGEAN SPRING TIDE?

According to the FOX Forecast Center, residents should expect significant beach erosion, higher-than-average surf and flooding of parking lots and roads.

Low-lying homes and businesses may also be impacted.

THIS COMPANY IS FIGHTING THE SEA TO PROTECT NORTH CAROLINA COASTAL HOMES

Flooding will be worse during high tides, which typically occur between 9 and 10 a.m. and between 10 and 11 p.m. each day.

Stay with FOX Weather as we continue to track this developing story.