Current observations show La Niña conditions persisting in the equatorial Pacific as of early 2026, with sea surface temperatures in the Niño 3.4 region averaging -0.5°C. NOAA’s Climate Prediction Center has issued an El Niño Watch, projecting a transition to ENSO-neutral conditions by May-July 2026 (55% probability) and a 62% chance of El Niño emerging during June-August. The pattern is expected to persist through the end of 2026.
The latest ECMWF seasonal ensemble, released in April 2026, shows every member predicting moderate to strong El Niño conditions by mid-June. Roughly half of the 20-plus ensemble members forecast Niño 3.4 sea surface temperature anomalies exceeding +2.5°C by October, using the 1981-2010 climatology baseline. NOAA currently assigns a 33% probability to a strong El Niño (Niño 3.4 index of +1.5°C or higher) during October-December.
A “super El Niño” is an informal classification for events where Niño 3.4 anomalies reach or exceed +2.0°C for at least one three-month period. Only five such events have occurred since 1950: 1972-73, 1982-83, 1997-98, 2015-16, and 2023-24. The 2015-16 event recorded the highest anomalies in recent decades. Model guidance indicates this year’s potential event could approach or exceed those thresholds.
If a strong El Niño materializes, it typically contributes to elevated global temperatures and shifts in precipitation patterns worldwide. Historical analogs show increased rainfall in parts of the southern United States, Peru, and eastern Africa, alongside drier conditions in Indonesia, Australia, and the Amazon. Atlantic hurricane activity tends to be suppressed during such events.
Long-range forecasts issued in spring carry higher uncertainty due to the seasonal predictability barrier. While subsurface ocean heat content and recent wind patterns support El Niño development, final strength and exact timing remain subject to change as models are updated in coming months.