The seasonal and inter-annual variability of the Modified Atlantic Water (MAW) in the Levantine Basin, particularly in the broader area south of Cyprus, is examined based on new data sets collected in the frame of the CYBO (Cyprus Basin Oceanography), CYCLOPS (Cycling of Phosphorous in the Mediterranean) and HaiSec (Long-term Haifa Section) projects, carried-out between 1995-2003. This new high resolution data sets provide quite strong evidence on the existence and the spatial/temporal fluctuation of the MAW and of the MMJ (Mid Mediterranean Jet). The MAW was traced during summer and winter to flow eastward, as transferred by the MMJ. The MMJ was well pronounced, both from in-situ and satellite SST, to meander eastward close to the south of Cyprus, along the periphery of the Cyprus eddy and of the re-appeared Shikmona gyre. The present investigations vividly shown that the MMJ in fact is a major driving mechanism responsible for the eastward spreading of the MAW in the Levantine Basin.