Scientists and meteorologists around the globe are sounding the alarm as the world braces for what could be a significant El Niño event later this year, with the potential to push global temperatures to new extremes. According to the U.S. National Oceanic and Atmospheric Administration (NOAA), there is now a 62% chance that El Niño will form during the summer months of 2026, with the possibility of a “super El Niño” — an exceptionally strong version of the phenomenon — reaching a one-in-three likelihood by the end of the year.
El Niño, a naturally occurring climate pattern, is marked by the warming of ocean surface temperatures in the central and eastern Pacific Ocean. This phenomenon typically emerges every two to seven years and has far-reaching impacts on weather patterns across the globe. Under normal conditions, cooler waters prevail near South America, while warmer waters remain in the western Pacific. However, during El Niño, this balance is disrupted as warmer waters spread eastward, affecting atmospheric circulation and triggering changes in rainfall, storms, and temperatures worldwide.
“If El Niño forms, the potential strength remains very uncertain, with a one-in-three chance that it would be ‘strong’ during October to December 2026,” NOAA’s Climate Prediction Center stated, as reported by Fox Carolina and Euronews. While the term “super El Niño” has gained media traction, experts emphasize that it is not an official scientific category. Instead, the strength of El Niño events is measured using the Oceanic Niño Index (ONI), which tracks sea surface temperature anomalies. A strong El Niño is defined as a peak ONI reading of 1.5°C or higher above normal.
Forecasting El Niño’s development is notoriously tricky, especially in the spring. Researchers at the University of Virginia highlighted that predictions made during this period carry a higher degree of uncertainty. Despite early signals — such as warming subsurface ocean temperatures and weakening trade winds — meteorologists caution that there is still considerable variability in how the phenomenon may evolve. “Seasonal forecasts are still evolving, and predictions made in spring 2026 carry higher uncertainty,” Virginia news reported.
The last El Niño event, which spanned from May 2023 to March 2024, had dramatic consequences. According to reports from The Economic Times and Euronews, it contributed to record-breaking global heat, deadly heatwaves, widespread wildfires, and severe flooding across multiple continents. Scientists estimate that a typical El Niño can temporarily raise global mean temperatures by about 0.1 to 0.2 degrees Celsius. While this may seem modest, it can amplify existing warming caused by human-driven climate change, which has already pushed global temperatures up by approximately 1.3 to 1.5°C compared to pre-industrial levels.
For every 1°C rise in air temperature, the atmosphere can hold about 7% more moisture. This increased capacity leads to heavier rainfall and greater flooding risks in some regions, while tropical areas may face more intense heatwaves. It’s no wonder, then, that El Niño years are frequently among the warmest on record. “El Niño years are frequently among the warmest on record due to increased atmospheric moisture holding capacity,” Euronews reported.
But what exactly distinguishes a “super” El Niño from a regular one? While there’s no official scientific definition, the term is used informally to describe a particularly strong event. As NOAA explains, a weak El Niño registers between 0.5 and 0.9°C above normal, a moderate event falls between 1 and 1.4°C, and a strong El Niño — the so-called “super” — occurs when the peak reading reaches 1.5°C or higher. The forecast for 2026 suggests a one-in-three chance of such a strong event developing between October and December, supported by “large amounts of heat already stored in the subsurface ocean and the expected weakening of low-level trade winds,” according to NOAA’s Climate Prediction Center.
El Niño’s impacts are not uniform worldwide. In the U.S., for instance, a strong El Niño during the summer and fall can suppress Atlantic hurricane activity, as increased wind shear makes it harder for hurricanes to form and intensify. “A stronger El Niño means more shear in the Atlantic waters and hurricanes don’t like shear,” Fox Carolina explained. If El Niño persists into winter, it could shift the jet stream northward, bringing cooler and wetter conditions to the southern U.S., including the Carolinas, while the north typically experiences warmer and drier weather.
El Niño and La Niña are two sides of the same climate coin. While El Niño brings warmer ocean conditions to the eastern Pacific, La Niña is characterized by stronger trade winds that push warm water westward, allowing cooler water to rise in the east. La Niña events generally have a cooling effect on global temperatures, though their regional impacts can still be significant. The recent transition from a La Niña phase increases the likelihood of El Niño forming, but scientists remain puzzled about whether there has been enough time for the ocean to accumulate the necessary heat for a truly strong event.
Researchers at Columbia University have raised intriguing questions about the influence of human-driven climate change on El Niño’s frequency and intensity. “It takes time to recharge the ‘battery’ of heat in the East Pacific, but perhaps human-made warming is decreasing the time needed to recharge the battery,” they noted. The rapid pace of ocean surface warming may be shortening the recharge time between El Niño events, potentially accelerating their timeline and increasing their strength. A paper published in March 2026 highlighted the “ongoing, extraordinary, acceleration of ocean surface warming” as a critical concern, beyond the frequency or strength of El Niño events themselves.
Despite the mounting evidence and growing concern, experts caution that more research is needed to establish clear links between climate change and changes in El Niño’s behavior. The stakes, however, are significant. As the world continues to warm, even a moderate boost in global temperatures from El Niño could push conditions well beyond what vulnerable communities are prepared to handle. The combination of human-induced warming and natural climate variability presents a formidable challenge for populations worldwide, especially in regions prone to extreme weather.
As summer 2026 approaches, all eyes are on the Pacific. Scientists, policymakers, and communities will be watching closely, hoping for clearer answers — and preparing for the possibility that the coming El Niño could be one for the record books.