Super El Niño threat grows as Pacific Ocean temperatures surge

Tuesday 12 May 2026 - 13:18

By: Dakir Madiha

Super El Niño threat grows as Pacific Ocean temperatures surge

Climate models are rapidly converging toward the emergence of a powerful El Niño event later this year, as ocean temperatures across the equatorial Pacific accelerate beyond earlier forecasts. Updated projections from the European Centre for Medium Range Weather Forecasts now place the probability of a Super El Niño forming by November at 100%, marking one of the sharpest forecast revisions recorded in recent years.

Scientists tracking Pacific Ocean conditions say warm waters are advancing eastward at an unusually fast pace. Current projections indicate sea surface temperatures in the central Pacific could exceed 3 degrees Celsius above average, a level not observed since the historic El Niño episode of 1877. Forecast confidence has risen dramatically in only a few months. In March, the probability of a Super El Niño stood at 22%. By late April, it had climbed to 80% before reaching full certainty in the latest May update.

Meteorologists attribute the rapid transition to a strong subsurface heat anomaly moving eastward through the Pacific via a Kelvin wave. This process transports large volumes of warm water from the western Pacific toward South America and intensifies warming near the equator. The US National Oceanic and Atmospheric Administration stated in its April diagnostic discussion that El Niño conditions are likely to emerge between May and July and persist through the end of 2026. The agency also acknowledged a 25% probability that the Niño 3.4 index could surpass the +2.0°C threshold associated with a Super El Niño event.

Additional atmospheric signals are reinforcing concerns among climate researchers. The World Meteorological Organization reported in April that sea surface temperatures across the equatorial Pacific were rising rapidly. Researchers also observed one of the strongest westerly wind bursts in decades during early April, with another expected later this month. These wind events accelerate the transfer of warm ocean waters eastward and strengthen El Niño development.

The evolving climate pattern could reshape weather conditions across multiple regions. In the Atlantic basin, El Niño tends to suppress hurricane activity by increasing upper-level wind shear, making it harder for tropical systems to organize. Forecast specialists expect this effect to reduce the likelihood of an extremely active Atlantic hurricane season in 2026. Conditions in the eastern Pacific are expected to move in the opposite direction, with a stronger tropical storm season likely after activity begins on May 15.

The United States could also face significant weather disruptions during the coming winter. Historically, strong El Niño events bring wetter conditions to California and the southern tier of the country. Southern California often experiences heavier rainfall, elevated flood risks and shifts in winter storm tracks during major El Niño years. Agricultural planning, water management and emergency preparedness agencies are already monitoring the forecasts closely.

Humanitarian organizations are also preparing for wider global consequences if the event extends into 2027. Previous Super El Niño episodes triggered droughts, flooding and monsoon disruptions across Latin America, Southeast Asia and Pacific island nations. Aid agencies have started contingency planning as scientists warn that a prolonged warming event could add further pressure to global temperatures that are already near record highs.