The upper most layers of the Persian Gulf (PG) as a pert of suface waters, along with the lower atmospheric boundary layer, play a crucial role in the air-sea fluxes of momentum, heat, and mass, thereby providing important boundary conditions for both the atmosphere and the surface waters that control the evolution of weather and climate. The principal internal feature of the thermocline is a series of thin, laminar-flow sheets of high static stability, separated by weakly turbulent layers of only moderate density gradient and a few metres thick. In this paper, the au¬thors present evidence of a clear coupling between thermocline and turbulence in northern part of the PG. Turbulence kinetic energy increasing will be resulted from winter to summer due to thermocline development in northern part of the PG.