The National Oceanic and Atmospheric Administration's Climate Prediction Center issued an El Niño Watch on May 14, saying El Niño conditions are likely to emerge soon and persist through the Northern Hemisphere winter of 2026-27. Forecasters placed the odds of El Niño developing during May through July at 82%, with a 96% chance the pattern remains in place through winter.
Current ocean and atmospheric conditions remain classified as ENSO-neutral, though warming trends continue across the equatorial Pacific Ocean. NOAA reported above-average subsurface ocean temperatures for the sixth straight month, along with atmospheric signals that often precede El Niño development. Surface temperatures in key monitoring regions also continued trending warmer.
For insurance claims professionals, El Niño development can influence seasonal catastrophe exposure across multiple regions of the United States. Historically, El Niño winters have been associated with wetter conditions across parts of the southern U.S., including California and Gulf Coast states, while some northern regions can experience warmer and drier conditions. Those shifts can alter flood, mudslide, severe weather, agricultural, and freeze-related claim activity.
Adjusters and catastrophe response teams may begin incorporating the latest ENSO outlooks into long-range staffing and deployment planning. Property insurers often monitor El Niño years closely because rainfall patterns, wildfire conditions, and severe storm frequency can shift significantly depending on the strength and timing of the event.
NOAA cautioned that uncertainty remains regarding how strong this El Niño could become. Forecasters noted that stronger ocean-atmosphere coupling during the summer months would increase the odds of a stronger event later in the year. The agency also emphasized that stronger El Niño events do not automatically translate into stronger impacts, but they can increase the likelihood of certain seasonal weather anomalies.
The next ENSO Diagnostic Discussion is scheduled for June 11, 2026.
