The flux of 222Rn from shallow water off the bay of Malaga has been measured by the accumulation method. The mean value of 67 atoms m-2 s-1 was obtained compared with a range of values from 11 to 116 atoms m-2 s-1 calculated from near-surface 222Rn profiles in seawater obtained by other investigators. Quanititative relations between the flux of 222Rn and 222Rn concentrations in surface water and the temperature of seawater were found. A correlation was also found between the flux of 222Rn and the wind speed at the moment of taking the sample.