Further support to Kolmogoroff's theory of local isotropy is provided by hot-wire measurements of fluctuations of downwind velocities at a height of 1 to 2 m above the sea surface. The results agree with those obtained from observations made in a tidal stream by Grant, Stewart and Moilliet (1962) and with measurements of skewness of velocity differences in air over land, made by Gurvich (1960).