MR. A. J. LEE has recently commented1 on my paper dealing with variations of sea surface temperature in coastal waters of the British Isles. He points out that I made no mention of the part played by currents in determining the winter pattern of sea surface temperature. I was, however, primarily concerned with the shape of the isotherm patterns. The presence of the relatively shallow water of the Dogger Bank area will, in itself, ensure that the pattern will consist of two tongues, although the level of temperature of these tongues will be largely determined by the strength of the currents mentioned by Mr. Lee.