There are several research institution that produce experimental seasonal forecasts and monitor SST conditions in the tropical Pacific.
 

 Latest El Niño/La Niña advisory

 Official NWC SST forecast

 ENSO outlook

 EMC SST forecast

 ENSO forecast from UCSD  Seasonal forecasts for the tropics form ECMWF

 Experimental El Niño forecasts

 SST forecasts from the neural network model

 Inverse Model ENSO forecast