Monthly Climate Timeseries:
Niño 3 SST

Central Tropical Pacific SST (5N-5S;150W-90W). Calculated from the NOAA ERSST V5. Map of region.
Correlation of January Niño 3 timeseries with NCEP SST.
Timeseries Plot:
Select this link to get an anomaly plot. Plot is taken from the Time-series Plotting and Analysis webpage.
Calculation Method:
SST area averaged 0-10S and 90W-80W. Dataset is the NOAA ERSST V5. Climatology time period is 1981-2010.
Time Interval: Monthly
Time Coverage: 1950-present
Update Status: Monthly

Get Data:
Niño 3 Index (Anomaly): Standard PSL Format (What is standard format?)
Niño 3 (Mean) : Standard PSL Format (What is standard format?)
Data is from the NOAA/NCEP CPC
  1. (Data) Reynolds, R.W., N.A. Rayner, T.M. Smith, D.C. Stokes, and W. Wang, 2002: An improved in situ and satellite SST analysis for climate. J. Climate, 15, 1609-1625.