Giant Ocean Wave Set to Pummel California as El Niño Intensifies
An oceanic Kelvin wave generated by a strong El Niño is days away from the California coast and could raise sea levels by up to a foot. Scientists say effects may persist well into spring 2027.
- 6 to 12 inches: the typical sea level increase a Kelvin wave produces, per NOAA.
- 17 named storms have formed in the eastern Pacific so far in 2026, with six becoming hurricanes.
- Ocean levels off Southern California are already about a foot above normal due to El Niño.
- California Gov. Gavin Newsom declared a statewide emergency over flooding and coastal hazard risks.
Why it matters: The Kelvin wave does not arrive in isolation. NOAA oceanographer Michael McPhaden described a potential 'quintuple whammy' for California: the Kelvin wave, a marine heatwave, climate-driven sea level rise, El Niño storm activity, and hurricane swells.
- Higher baseline sea levels lift the starting point for tides and storms, pushing water farther inland and accelerating beach and cliff erosion.
- Kate Huckelbridge of the California Coastal Commission wrote in a September memo: 'The most damaging storms are often those that coincide with the highest tides.'
How 3 sources split on this story
Where they split: Coverage agrees on the physical facts; outlets differ on how prominently to emphasize climate change as a driver versus El Niño's natural variability.
Center coverage, 1 sources: The center presents the Kelvin wave as a compounding coastal hazard, balancing scientific explanation with on-the-ground damage reports and official emergency declarations.
Left coverage, 1 sources: The left frames the Kelvin wave as one more symptom of accelerating, human-driven climate change — emphasizing thermal expansion, land subsidence, melting polar ice, and the warning that these hazards will outlast El Niño.
Right coverage, 1 sources: The right emphasizes the scale and immediacy of the physical threat — a planetary-sized wave, record-breaking hurricane activity, and a multi-factor 'quintuple whammy' — with less focus on climate change as a root cause.
What’s next: Climate scientist Daniel Swain said California could face two or three more Kelvin waves this winter.
- Dillon Amaya of North Carolina State University said Bay Area sea levels may not normalize until spring 2027.
- How much total coastal damage will this El Niño season produce before conditions normalize?
- Will any subsequent Kelvin waves arrive during peak storm or king tide windows, compounding impacts further?