Comments:

Altimetry map and indicator seem to indicate that the situation is evolving towards an El Niño, even if it's out of season (but experts think that we still haven't seen the whole range of possible El Niño/La Niña in the twenty years or so since global monitoring is enabled).
Temperature anomalies with respect to depth at the equator (equatorial section based on TAO array data) show an anomaly about +1°C in surface. This suggest that the warm pool is beginning to empty towards East and Equatorial Peru coasts.

J. Merle, Club des Argonautes, June 2008

Latest monthly mean of Sea Level Anomalies over the Tropical Pacific. A Sea Surface Temperature anomalies map is also available.
See also previous maps

Standardized Sea Level Anomalies over the Nino3.4 region. See also Standardized Sea Surface Temperature Anomalies, and non-standardized Sea Level Anomalies and Sea Surface Temperature Anomalies.

• Previous maps (since November 1992)
• Other observations
• CPC/NCEP (every Monday, sea surface temperature maps, subsurface analysis - thermocline variations - temperature/depth diagrams...)
• Maps and sections from the TAO array
• Forecasts :
• ECMWF
• CPC/NCEP Climate Prediction Center/National Center for Environmental Prediction
• IRI International Research Institute for Climate Prediction

For more information:

• Applications: ENSO