Wind anomalies are difficult to forecast over the long-term. In general, what makes them easier to forecast is the state of ENSO to begin with. If an El Nino or La Nina has already formed, long-term wind anomaly forecasts become more skillful as the ocean and atmosphere have coupled. Absent this coupling, however, like in ENSO-Neutral or the development phase of El Nino or La Nina, it can be a bit more difficult.