A cooling device for cooling a cable assembly, containing an outer pipe, which is designed to accommodate the cable assembly in such a way that an intermediate space for accommodating a cooling water layer remains between the outer pipe and the cable assembly, a connecting element for creating a water-tight connection between the outer pipe and the cable assembly, and a pressure controller for controlling the water pressure in the cooling water layer, is provided. A cable device is also provided, including an electric cable assembly, and a cooling device. A wind farm is also provided, including a number of cable assemblies for transmitting electrical power from wind turbines and including a number of cooling devices for cooling the cable assemblies A method for providing a cooling device for a cable assembly is further provided.