The 2026 El Niño is poised to cause new extreme weather patterns. Forecasting models can't predict these patterns currently. It will probably introduce conditions that vary from past seasons. Forecasters say the lack of data makes it challenging to foresee storms, droughts, and heatwaves. Scientists observe sea surface temperatures in the Pacific. They expect effects to come over the subsequent period. Without good predictions, governments and communities must remain vigilant to multiple consequences. Researchers seek to upgrade their systems as new data comes in. Right now, uncertainty is the key feature of the 2026 El Niño.