The surface interannual variability of the Pacific Sector of the Southern Ocean (PSSO) is related to the variations of the large-scale climatic patterns. Both the Southern Annular Mode (SAM) and El Nino Southern Oscillation (ENSO) influence the level of Eddy Kinetic Energy (EKE) in the PSSO and then the Antarctic Circumpolar Current (ACC) dynamical balance. Altimetry and drifter data depict two different possible responses of the EKE field during the period 1995-2017, showing positive/negative anomalies of the EKE when positive SAM values coincide with La Niña/El Niño events. Positive anomalies of the EKE are associated with increments of the meridional eddy heat fluxes both in southward and northward directions. Largest poleward fluxes are observed along the western boundary while largest equatorward fluxes involve the main meanders of the ACC latitudinal band. The PSSO results also linked to the decadal variability associated with the EKE and baroclinic transport time series derived from XBT and Argo float data. In the first decade (1995-2006) the prevalence of years with significant El Niño events is reflected by a predominance of negative anomalies of EKE an almost constant value in the transport time series. In the second decade (2007-2017), the higher variability of indices and the larger contribution of significant La Niña events are reflected by a predominance of positive anomalies of EKE and by a sharp increase of the transport time series.