Scientists Expect Kelvin Wave to Raise West Coast Sea Levels This Winter

Scientists Expect Kelvin Wave to Raise West Coast Sea Levels This Winter

Climate

Scientists say a Kelvin wave linked to the current El Niño is expected to raise sea levels by up to a foot along the California, Oregon and Washington coasts through the winter, increasing flood and erosion risks. Earlier reports warned that the warm-water Kelvin wave could combine with an unusually strong El Niño, prompting emergency officials to ready flood defenses and urging residents to prepare for higher tides. The same scientists have repeatedly projected that the wave could persist for several months, potentially intensifying coastal flooding and shoreline erosion across the West Coast.

Actors

Severine Fournier NASA Jet Propulsion Laboratory Nate Mantua NOAA Mike Jacox Southwest Fisheries Science Center Gavin Newsom California Coastal Commission Kate Huckelbridge

Locations

South America U.S. West Coast California

Fact Check

How these metrics work
Verdict: Insufficient evidence Confidence: 22% Claims: 1
At a glance

The claim that scientists said on October 3, 2026, a coastal Kelvin wave linked to El Niño could raise sea levels along California’s shoreline by up to twelve inches in the coming days has insufficient evidence. No claims were confirmed, partially confirmed, or refuted.

Sign in or subscribe to unlock the full breakdown: claims, sources, and validations.

Sign up Sign in

This section contains an automated verification of claims against external sources and may contain inaccuracies.

Articles

October 03, 2026
2 total
Kelvin wave expected to raise West Coast sea levels through winter
Kelvin wave expected to raise West Coast sea levels through winter

PBS • 03 Oct 19:45

A Kelvin wave linked to the current El Niño is projected to lift sea levels by up to a foot along the California, Oregon and Washington coasts, potentially intensifying flooding and erosion risks during the coming months.

Credibility 72% Manip. 8% Center
El Niño-driven Kelvin wave expected to raise California sea levels by up to a foot
El Niño-driven Kelvin wave expected to raise California sea levels by up to a foot

nypost.com • 03 Oct 02:12

Scientists say a coastal Kelvin wave linked to El Niño could lift sea levels along California’s shoreline by as much as twelve inches in the coming days, increasing flood and erosion risks.

Credibility 68% Manip. 30% Center
September 30, 2026
1 total
California prepares for Kelvin wave and rising sea levels
California prepares for Kelvin wave and rising sea levels

The Guardian • 30 Sep 11:02

Scientists warn that a warm-water Kelvin wave could raise California's coastal waters by up to a foot and combine with an unusually strong El Niño, prompting emergency officials to ready flood defenses.

Credibility 68% Manip. 32% Center
September 29, 2026
1 total
Kelvin Wave Expected to Raise California Sea Levels by Up to One Foot
Kelvin Wave Expected to Raise California Sea Levels by Up to One Foot

newser.com • 29 Sep 10:40

Scientists warn that a large Kelvin wave of warm Pacific water, intensified by a strong El Niño, could lift California's sea level by as much as a foot for several months.

Credibility 68% Manip. 12% Center
September 28, 2026
1 total
Kelvin wave may raise California sea levels by up to a foot as El Niño intensifies
Kelvin wave may raise California sea levels by up to a foot as El Niño intensifies

The Guardian • 28 Sep 11:00

Scientists say a slow-moving Kelvin wave, amplified by a strong El Niño, could lift coastal water levels in California by as much as one foot through the winter, prompting state emergency preparations.

Credibility 78% Manip. 9% Center

Related events