Track El Niño like an expert.
The daily Niño 3.4 index, the ocean below the surface, Kelvin waves, tide forecasts for the West Coast, and 13 forecast models, plus a seasonal outlook for your own area. The data NOAA uses, in your pocket.
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A very strong El Niño is building for winter 2026–27, and it raises the sea along the West Coast. Version 1.3 adds tide forecasts and flood-day odds for 42 gauges.
Current conditions
The daily Niño 3.4 index, absolute or relative to the warming tropics, with its record rank; RONI, NOAA's official index since 2026; and the full NOAA/CPC advisory with its figures.
Tides New
Ten-day tide forecasts for 42 gauges from Southern California to Alaska and Hawaii: NOAA's tide table, plus how far the water is running above it and what the weather adds. A season calendar of flood-day odds, the Pacific's sea-level tilt, and alerts for the gauge and level you choose.
Kelvin waves
A tracker that maps every wave of the last three months across the equatorial Pacific and up both American coasts, with the moorings and tide gauges it passes; a Hovmöller along the equator and both coasts; and the El Niño phase plane, where the ocean is in its cycle.
Expert views
The equatorial Hovmöller (SST, convection, thermocline depth and sea level), the subsurface temperature section, the ENSO Longitude Index with its forecast, and a sea surface height map.
13 forecast models
The full multi-model plume from NOAA, NASA, ECMWF, the Met Office and more, the multi-model mean that decades of verification say to trust, and trends as each month's runs come in.
My Forecast
Pick any point on Earth and get its own outlook: a plain verdict, the map framed on your region, and a week-by-week timeline, as anomalies or percentiles, °F or °C.
Built by a PhD atmospheric scientist
Every tile below the surface has a method note and references. The maps are easy to read at a glance, and experts can open individual models and draw their own conclusions.
Alerts that matter
A push when the official status changes, a new ONI posts, a new forecast arrives, a Kelvin wave reaches the coast, or the ocean changes phase, a few a month. Tide alerts are separate and fire only for the gauge and level you pick.
75 years of history
Every El Niño and La Niña since 1950 in RONI or ONI (MEI.v2 since 1979), plus seven short Learn chapters on how ENSO works, Kelvin waves and tides.