See whether the Pacific is warming.

See what’s happening in the Pacific

See whether the Pacific is warming.

Live NOAA data shows whether the tropical Pacific is warming, cooling, or still uncertain.

• Live public NOAA data
• Current picture, not a forecast
• No account needed

Start here

The four things you want to know.

• Pacific nowWarming, cooling, or uncertain
• Signal strengthHow clearly the signs agree
• Recent changeBuilding or fading
• What to watchThe next sign that matters

Trusted across the World

Get your instance



Sea temperature anomaly · °C

• ≤ −2
• −2 to −1
• −1 to −0.5
• −0.5 to +0.5
• +0.5 to +1
• +1 to +2
• ≥ +2

Real El Niño users, mapped from App Store data

Ocean data: NOAA PSL OISST v2.1 · Land data: Natural Earth

Inside the app

The answer first. The details when you want them.

The Today screen starts with a simple summary. Open the maps, charts, past events, or source details when you want to see why.



Pacific map

See where the Pacific is warmer or cooler than usual.

The map marks Niño 3.4, the part of the tropical Pacific scientists watch most closely for El Niño and La Niña.



Changes over time

See whether the pattern is growing or fading.

Weekly and monthly charts show how ocean temperatures are changing and whether the air and winds above the Pacific are changing too.



Past events

Compare today with completed events.

See which completed El Niño events look most like today, then compare how temperatures changed before and after their peak. Similarity adds context; it does not predict what happens next.



ENSO Signal Score

One score for how clear the pattern is.

ENSO is the name for the Pacific cycle that includes El Niño and La Niña. The 0–100 ENSO Signal Score combines ocean temperatures with changes in the air above the Pacific. A higher score means the signs agree more clearly; it does not mean El Niño is certain.

0–49Too early

50–64Early

65–79Watch

80–100Strong



Share and see the sources

Share a clear update and see where it came from.

Share a daily snapshot, then open Sources to see which public NOAA data was used and when it was updated.

• A daily picture ready to share
• Source names and update times
• Home Screen widget and alerts

El Niño for iPhone

See what the Pacific is doing today.

Get the current picture, maps, charts, past events, widgets, and updates you can share.