El Niño / ENSO Monitor

A public data service for following the El Niño–Southern Oscillation: current state, index history, ocean and atmosphere maps, equatorial subsurface temperature, and official forecast guidance.

API

/api/v1/state — current ENSO state
/api/v1/indices — available indices and history
/api/v1/layers — map layers and tile templates
/api/v1/forecast — official forecast guidance
/api/v1/subsurface/dates — subsurface observation dates

Sources

Observations and forecast guidance are derived from public datasets published by NOAA (CPC, PSL, NCEI) and the North American Multi-Model Ensemble. Each response carries its own observation dates and freshness metadata.