National Weather Service United States Department of Commerce

El Niño Information Links

El Niño describes the warm phase of a naturally ccurring sea surface temperature oscillation in the tropical Pacific Ocean. 

La Niña Information Links

What is La Niña

La Niña is characterized by unusually cold ocean temperatures in the eastern equatorial Pacific, as compared to El Niño, which is characterized by unusually warm ocean temperatures in the Equatorial Pacific.


Sea Surface Temperatures