Weak La Niña conditions are fading as tropical Pacific indicators shift toward ENSO-neutral state
Sea surface temperatures and atmospheric patterns in the tropical Pacific show clear signals of transition from La Niña conditions that have persisted through early 2026
| Period | ENSO-Neutral | La Niña | El Niño |
|---|---|---|---|
| Mar-May 2026 | 60% | 30% | 10% |
| Current Status | Transitioning | Weakening | Minimal |
Substantial uncertainty exists across tropical Pacific sea surface temperature forecasts, with widespread variation among models and ensemble members
Warmer Pacific conditions
Cooler Pacific conditions
Baseline conditions
ENSO transitions drive extreme weather events that kill people, displace millions, and collapse food security
The shift from La Niña toward potential El Niño conditions creates cascading risks across agricultural systems, coastal communities, and vulnerable populations globally
Food-insecure populations face affordability collapse as agricultural systems destabilize during ENSO transitions, with farmers confronting crop planning chaos
Regional seasonal outlooks must assess relative effects of ENSO alongside other climate drivers to provide accurate impact forecasts for decision-makers