El Nino Or La Nina 2024 Dates. While those odds have shifted slightly, the data is still favoring la niña. Scientists say this winter will likely see a weak to moderate strength event, with the phenomenon possibly weakening early in 2025.

The 2023/24 el niño event is now showing signs of ending. There is likely to be a swing back to la niña conditions later this year, according to a new update from the world meteorological organization (wmo).