In this research, we apply the method of colocalization of altimetry data and CTD profiles from multiple platforms (research vessels, autonomous profiling floats, and gliders) to study the seasonal variability of thermohaline structures of cyclonic and anticyclonic eddies in the Lofoten Basin. We demonstrate the thermohaline structure of anticyclonic eddies reveals significant seasonal variability manifesting itself in the deepening of positive anomalies in the summer period and decreasing the vertical extension of the eddy cores. We show that a prominent feature of the thermohaline structure of cyclonic eddies is the positive salinity anomalies in the upper layer. We establish mean zonal eddy-induced transport is generally westward in both summer and winter periods. The pronounced seasonal cycle manifests itself in the intensification of zonal and meridional eddy-induced transport in winter.