The latest seasonal modeling from the European Centre for Medium-Range Weather Forecasts projects sea surface temperatures in the equatorial Pacific Ocean will surge well above average later this year, and in nearly every scenario, the coming El Niño event would surpass anything in the modern record.
The numbers are not subtle. In almost every ECMWF simulation, temperatures in the equatorial Pacific will climb 3°C (5.4°F) above average by December. Some model runs show warming in excess of 4°C (7.2°F). Even the most conservative projections put the anomaly around 2°C (3.6°F) above normal, still a powerful event by any historical standard.
If these projections hold, the brewing El Niño would blow past the two strongest events ever measured. The 1997, 98 and 2015, 16 El Niños each registered a peak of 2.3°C on the Niño 3.4 index. What the models now show is a different order of magnitude, and the downstream consequences for weather, agriculture, and energy demand across the globe could be severe.
Ben Noll, a meteorologist and global weather writer at the Washington Post, flagged the ECMWF data on X. His assessment was blunt.
"Almost every scenario now reaches past +3˚C, with a cluster of high-end scenarios in excess of +4˚C. This outlook now depicts the strongest El Niño on record."
The World Meteorological Organisation has separately predicted an 80 percent chance that El Niño conditions will begin by June or August, and a 90 percent chance the event will persist until at least November. The WMO also projects above-normal temperatures across "nearly all parts of the globe."
NASA satellite data adds another data point. The agency reported that a swell of warm water hundreds of miles wide has arrived in the Pacific, a telltale precursor. NASA explained the mechanics plainly: "Waves of higher, warmer water move eastward across the Pacific Ocean a few months before an El Niño emerges. Several have shown up in 2026 satellite data."
Those Kelvin waves, subsurface pulses of warm water that weaken the normal easterly trade winds and allow warm Pacific water to spread, are the engine that drives El Niño into gear.
The ECMWF modeling uses what scientists call "relative indices," which strip out the background warming trend to isolate changes driven specifically by the El Niño, Southern Oscillation cycle. That distinction matters. It means the projected anomalies reflect the El Niño signal itself, not just the general upward drift in ocean temperatures.
The Niño 1+2 index, which tracks waters off the coast of South America, paints an even more dramatic picture. That index suggests sea surface temperatures could approach 5°C (9°F) above average by November.
For context: during the 1982, 83 El Niño, the monthly Niño 1+2 index peaked at 4.2°C (7.6°F). The 1997, 98 event hit 3.9°C (7°F). A reading near 5°C would exceed both by a wide margin.
El Niño does not distribute its effects evenly. The WMO forecasts the strongest heat signals across southern and western North America, Central America, the Caribbean, Europe, North Africa, and much of Asia. In the Southern Hemisphere, northern South America is expected to see the most pronounced warming, with southern Africa also forecast to experience widespread above-normal temperatures.
Australia faces warmer conditions mainly along its western, southern, and eastern coasts, though no clear trend is projected for the north. Tropical regions, especially equatorial Africa, Southeast Asia, and the Maritime Continent, are forecast to run hotter than normal.
Rainfall patterns shift, too. El Niño typically brings wetter conditions to parts of the southern United States, southern South America, the Horn of Africa, and central Asia. It brings drier conditions to Central America, northern South America, the Caribbean, Australia, Indonesia, and parts of southern Asia.
The practical consequences of those shifts, for crop yields, water supplies, wildfire risk, and energy grids, are what make El Niño more than an abstract climate curiosity.
The El Niño, Southern Oscillation is a natural climate pattern that shifts between warm (El Niño), cool (La Niña), and neutral phases every two to seven years. Climate.gov describes the cycle's three phases and notes its irregular timing. The Niño 3.4 region, the patch of ocean between 5 degrees north and 5 degrees south latitude and 120 to 170 degrees west longitude, is the standard benchmark scientists use to gauge intensity.
The last El Niño cycle ran from June 2023 through April 2024. That injection of heat helped make 2024 the hottest year on record and the first year to breach the 1.5°C (2.7°F) warming threshold set out in the Paris Agreement.
Now, barely a year later, models suggest a far stronger event is forming. Scientists say there is a strong chance 2026 will surpass 2024 as the hottest year ever recorded.
Models are not guarantees. Seasonal climate forecasts carry real uncertainty, and projections issued months in advance can shift as new data arrives. The ECMWF plumes represent a range of possible outcomes, not a single locked-in trajectory. Even so, the consistency across nearly all model runs, and across multiple agencies, is difficult to dismiss.
Several questions remain open. How quickly will the Kelvin wave activity translate into surface warming? Will the high-end scenarios materialize, or will the event settle closer to the conservative end of the range? And how will governments, farmers, and energy planners prepare for the disruption that strong El Niño events historically deliver?
Those are practical questions, not theoretical ones. A super El Niño reshuffles weather patterns across continents. It strains food production in drought-hit regions. It drives energy demand higher in places already struggling with grid reliability. It can turn a manageable wildfire season into a catastrophic one.
What matters now is whether policymakers treat these projections as actionable intelligence or as background noise. The data from ECMWF, NASA, and the WMO is converging on the same signal. The last time a strong El Niño hit, it caught infrastructure and supply chains off guard in multiple countries. The window for preparation is measured in months, not years.
For American households, the implications are concrete. A strong El Niño can drive up food prices through disrupted harvests abroad. It can spike natural gas and electricity costs through extreme weather. It can reshape insurance markets in flood- and fire-prone areas. None of that is speculative, it is the documented pattern from prior events.
Nature does not care about political timelines or budget cycles. If the models are right, the strongest El Niño ever recorded is forming now, and the time to plan for it is before it arrives, not after.
