The tropical Pacific is heating up—fast. The National Oceanic and Atmospheric Administration (NOAA) now gives an 82% probability that El Niño arrives between May and July 2026. The chance of it lasting through the Northern Hemisphere winter stands at 96%.
More striking: one in three odds now favor this becoming a “super” El Niño—a classification scientists reserve for the rarest and most destructive tier of the phenomenon.
What Is El Niño—and What Earns It “Super” Label?
El Niño is a periodic warming of the central and eastern equatorial Pacific Ocean that occurs every two to seven years. When it peaks, it reshapes global weather—triggering droughts, floods, crop failures, and extreme heat across regions far from the Pacific.
Meteorologists classify El Niño’s strength by how far ocean surface temperatures rise above historical averages. A “very strong,” or super, El Niño requires temperatures to exceed 2°C above normal. The last super El Niño struck in 2015–16. The strongest on record may have been the 1877 event, which triggered a famine that killed more than 50 million people roughly 3% of the world’s population.
“After a period of neutral conditions at the start of the year, climate models are now strongly aligned, and there is high confidence in the onset of El Niño, followed by further intensification in the months that follow,” said Wilfran Moufouma Okia, Chief of Climate Prediction at the World Meteorological Organization.
Signal Driving the Alarm
The current threat traces to a burst of unusual wind activity in early 2026. Two cyclones straddling the equator in April briefly reversed the Pacific’s trade winds, sending a pulse of subsurface heat—called a downwelling Kelvin wave—moving eastward beneath the ocean surface. That pulse has now reached the eastern Pacific, driving surface temperatures off South America up by as much as 1°C above average.
For El Niño to reach super status, those warmer surface waters must trigger a self-sustaining feedback loop: rising temperatures weaken the trade winds, which push more warm water east, which weakens the winds further. That loop has not locked in yet.
“Confidence is clearly shifting higher on potentially the biggest El Niño event since the 1870s,” wrote Paul Roundy, a professor of atmospheric and environmental sciences at the University at Albany, on X on May 5.
But scientists urge caution. In both 2014 and 2017, models signalled strong El Niño conditions that never materialised. As of mid-May, the wind patterns needed to sustain ocean warming have not appeared. NOAA’s own report states that no single strength category carries a probability above 37%.
India’s Monsoon Under Threat
India is directly in El Niño’s path. The India Meteorological Department (IMD) has already forecast a below-normal monsoon—rainfall at 92% of the long-period average—its weakest projection since the agency adopted its current forecasting system in 2007.
“If the El Niño forms earlier than expected, it is likely to have an impact on monsoon rainfall,” said Mrutyunjay Mohapatra, IMD Director General.
Roughly 70% of El Niño events since 1980 have coincided with deficient monsoons in India. Agriculture and water supplies for hundreds of millions of people depend on those four months of rain.
A World at Risk
El Niño does not strike everywhere at once. Its effects unfold in sequence across the globe.
During the summer months, India and Southeast Asia face monsoon suppression. The Atlantic hurricane season typically quiets while the eastern Pacific grows more active. By winter, heavy rainfall and flooding strike Peru and southern Brazil. Drought spreads across the Amazon, Indonesia, and parts of southern Africa.
The 1997–98 El Niño alone caused an estimated $32 billion to $96 billion in global economic losses.
“You’ve got more people already living in poverty and if you get a reduction in crop yields because of drought or flooding then that drives prices even higher,” said Liz Stephens, a professor of climate risk and resilience at the University of Reading. “So we’re looking at potentially quite huge humanitarian impacts this year.”
Climate change sharpens the threat. A warmer ocean and atmosphere generate more energy and moisture for extreme weather events.
“What is different now is that our atmosphere and oceans are substantially warmer than they were in the 1870s, which means the associated extremes could be more extreme,” said Deepti Singh, head of the Climate Extremes and Impacts Lab at Washington State University.
Next Critical Window
NOAA’s next ENSO update arrives June 11. By then, the spring predictability barrier—the seasonal window when El Niño forecasts are least reliable—will have passed.
The European Centre for Medium-Range Weather Forecasts was more aggressive in its May 1 estimate, projecting that Pacific waters could reach 3°C above average by November.
How winds behave in the coming weeks will determine whether this El Niño becomes merely strong—or earns the super label forecasters are already debating. For regions already stretched by poverty and climate stress, Singh and Stephens make the same point plainly: preparing for the worst cannot wait for the forecasts to catch up with what the Pacific is already doing.
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