This paper is the second of a two-part series on using microwave techniques for detection and characterization of wave breaking. The statistics of sea spikes detected using the method described in Part 1 are investigated as functions of friction velocity u* and of a Reynolds number Re* based on u* and the dominant surface wavelength. For vertical (VV) and horizontal (HH) polarization, the frequency of sea spikes and their contribution to the mean radar cross section show a roughly cubic dependence on u*. The percentage of wave crests producing sea spikes, Pss, is consistent with the Re* exponent of 1.5 reported by other investigations. At high friction velocities (u* between 40 and 50 cm s-1), sea spikes contribute between 10% and 15% to the mean radar cross section for VV polarization and between 15% and 25% for HH polarization. The data suggest that the average radar cross section of an individual sea spike does not depend on u*. Measurements of Doppler frequency and bandwidth are used to investigate the kinematics of the breaking process. ¿American Geophysical Union 1991