El Niño-driven wave to raise California sea levels
El Niño-driven wave to raise California sea levels
US · Published Sep 15, 2026
A coastal Kelvin wave, driven by the ongoing El Niño, is moving north from the west coast of Mexico and is expected to reach California by October.
This wave, caused by changes in Pacific wind patterns, will raise sea levels by approximately one foot (30 cm).

Impact & Risks

The raised sea levels will increase the likelihood of coastal flooding and beach erosion, which could disrupt tourism and recreational activities. Roads near the coast may experience sinkholes, leading to travel delays and infrastructure damage. Surfers in Southern California may face heightened risks due to reduced beach areas and larger waves. If the wave coincides with King Tides or powerful storms, the impacts could be severe, including significant property damage and safety hazards for coastal residents. The ongoing El Niño could bring additional waves, compounding these risks throughout the fall and winter.

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