The sea surface temperature anomalies on the current day

According to some indicies, we are currently experiencing a La Niño.

The FNMOC story: Sea Surface Temperature (SST) anomalies from OTIS

click image for fullsize image

and the SSTs themselves:

Click on image for full-size version

The NOAA story

This animation shows the development of the 1997-98 El Niño from January 1997 to the present day.

See NOAA-CIRES Climate Diagnostics Center's page showing an animated comparison between the 82-83 El Niño and the 97-98 El Niño