El Niño has formed in the Pacific and the World Meteorological Organization says it could strengthen rapidly into a strong event by July–September 2026—raising odds of drought, heavy rainfall, and heatwaves worldwide. Forecasters also say there’s a 63% chance
For a climate pattern that usually stays out of the public eye, El Niño is suddenly impossible to ignore.
The World Meteorological Organization says El Niño conditions have developed in the tropical Pacific and could “strengthen rapidly” in the coming months. That warning isn’t just about shifting sea temperatures—it’s about what those shifts can mean on land and at sea. from drought and heavy rainfall to the risk of heatwaves.
WMO Secretary-General Celeste Saulo put it bluntly: “El Niño conditions are already underway and are forecast to strengthen rapidly into a strong event. as accurately anticipated by WMO forecasts.” She added that this would intensify the chances of drought and heavy rainfall and raise the risk of heatwaves on land and marine heatwaves in many regions of the world.
The latest data WMO is pointing to suggest a “rapid development” into a strong El Niño event during July–September 2026.
The arrival has also been acknowledged elsewhere. The National Oceanic and Atmospheric Administration officially confirmed El Niño last month—describing it as a prolonged period of warming sea surface temperatures in the central and eastern Pacific that affects weather patterns across the globe.
What’s settled is that El Niño is here. What remains uneasy is how strong it could get—and what that strength will translate into for weather this winter.
WMO’s forecast lands in a familiar but high-stakes question: how hard will this El Niño push the atmosphere out of its usual rhythm?
The physics start in the Pacific. Normally, Pacific trade winds blow west across the equator, pushing warm water toward Asia. Cold water then “upwells” from deeper in the ocean to replace what’s been moved away.
El Niño interrupts that pattern. It’s triggered by weaker-than-usual trade winds, which allow much of the warm water to flow back toward the west coast of the Americas.
That change forces the Pacific jet stream—described by WMO-like explanations as a high-altitude air current and a roughly 7. 000-mile “conveyor belt” that moves storms east across the Pacific toward North America—to shift south of its usual path. The result is altered weather patterns across the U.S. and the globe.
The opposite phase is La Niña: stronger trade winds, colder water, and a jet stream that moves north rather than south.
El Niño and La Niña tend to happen roughly every two to seven years, and they typically last nine to 12 months. El Niño generally arises more frequently than La Niña.
From “just forming” to “super”
Meteorologists judge El Niño strength by how much water temperature rises above average in a patch of the equatorial Pacific. The threshold for a weak El Niño is 0.5°C (0.9°F). Current temperatures are just above that mark.
To become a very strong or “super” El Niño, the equatorial Pacific would need to warm by 2°C (or 3.6°F)—a level that’s far less common.
If a “super El Niño” develops in 2026, NOAA says it would be the first since 2015-2016, which was one of the strongest on record. Other super events included 1997-1998, 1982-1983, and 1972-1973.
The uncertainty shows up clearly in the numbers. Between November 2026 and January 2027, NOAA estimates a 63% chance that sea surface temperatures will rise 2°C (or 3.6°F) or more above their historical averages—the level forecasters would consider very strong or “super.”
That matters because even when the “super” label is possible, the weather consequences don’t arrive on schedule with the same consistency.
A winter that could tilt colder and wetter—then keep warming
One scenario some forecasters watch closely: a “super El Niño” could saddle the southern half of the United States with a much cooler and wetter winter.
In the background is another worry tied to a warming world. Such an event could also help push what might become the hottest year on record.
NOAA said in early May that 2026 is “very likely” to be one of the five hottest years on record—without even accounting for El Niño’s warming influence. A “super El Niño” could make 2026 or 2027 the hottest year on record, displacing 2024.
There’s no guarantee, though. Michelle L’Heureux, a physical scientist at NOAA, told USA Today: “Stronger El Niño events do not ensure strong impacts; they can only make certain impacts more likely. There is still enough uncertainty that seeing a weaker outcome would not be a surprise.”
Where storms and heat can shift
Some effects are still easier to anticipate than others.
Stronger El Niño events tend to flip the hurricane season equation. They often suppress storms in the Caribbean and tropical Atlantic while amplifying them in the central and eastern Pacific. That means more tropical threats to Hawaii and the Southwest U.S. are a possibility.
But it’s not just one season or one type of weather. Extremes of wetness and dryness—and heat and cold—are on the table.
Winter tends to get warmer in the northern half of North America and cooler and wetter in the southern half, especially in the Southeast and along the Gulf Coast.
Elsewhere, drought could afflict the Caribbean, while India and Southeast Asia might see fewer summer monsoons.
The economic stakes
The impacts don’t stay in the weather forecast. They reach budgets, food systems, insurance bills, infrastructure, and livelihoods.
A 2023 study published in the journal Science traced the broader fallout from past El Niño events. It found that the 1982-83 El Niño led to $4.1 trillion in global income losses, while the 1997-98 successor cut global income by $5.7 trillion.
The warning is sobering: even if the exact outcome varies, the range of plausible damage can be enormous.
No single winter story, just a pattern that can tighten
El Niño doesn’t behave like a script. The 2015-2016 “super El Niño,” for example, didn’t deliver a wetter-than-average winter in Southern California—one of its typical trademarks.
And climate change complicates what past events can teach. The ocean is already significantly warmer today than it was back then, making what we “know about previous El Niños” less helpful for predicting what could come next.
Still, the current sequence is clear: El Niño conditions are already underway, and WMO expects rapid strengthening into a strong event during July–September 2026.
As the calendar moves toward late 2026 and early 2027, the atmosphere is being asked to decide how strong this one becomes. If it turns into the “super” variant NOAA has quantified, the odds of drought, heavy rainfall, shifting storm patterns, and heat extremes rise.
The only certainty, at least for now, is that the world will feel it—and that the strongest impacts are still not guaranteed.
El Niño WMO NOAA super El Niño July–September 2026 drought heavy rainfall heatwaves hurricane season global income losses
So basically July-September is gonna be chaos again.
I don’t even know what El Niño is but people keep saying it like it’s weather magic. If it causes drought and heavy rain… how is that even possible at the same time? Sounds like every forecast is just doom.
Wait so this is the Pacific Ocean “deciding” to get worse? My cousin said El Niño is why the hurricanes acted weird last year, so I guess it’ll hit us the same way. Also 63% chance means it’s guaranteed right??
Man WMO always says “strengthen rapidly” like that’s supposed to help. Drought, heavy rainfall, heatwaves… sounds like the same excuses for whatever happens anyway. Are they saying this will start in 2026 for sure or just “odds,” because the article jumps around. Either way I’m buying a fan and acting like I’m in control.