Ocean temperature
Daily sea surface temperature anomaly: how much warmer (red) or cooler (blue) the water is compared with normal. The warm tongue along the equator is El Niño's fingerprint.
Sea surface temperature anomaly
Last 90 days at 1° resolution. Drag the slider or play the animation.
Source: NOAA NCEI OISST v2.1 (preliminary) via CoastWatch ERDDAP. Anomalies relative to 1971–2000 (which is why they run slightly higher than NOAA CPC indices, based on 1991–2020).
Equatorial Hovmöller diagram
Mean anomaly between 5°S and 5°N, from 120°E to 80°W, day by day.
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Bands tilting to the right are warm Kelvin waves crossing the Pacific towards South America in about two months.
Daily indices
Niño 3.4 and Niño 1+2 computed daily from OISST.
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Our own estimate (unofficial), 1971–2000 base.