The circumferential variability of chloride penetration is analyzed based on the powder inspection collected from circular concrete column in Zhapu port. Then, the cumulative wind velocity, the cumulative wind pressure and wave pressure circumferential distribution at each direction of the circular concrete column are calculated according to the wind regime and wave conditions of Zhapu port. Also, using a grey analysis method, the correlations among the cumulative wind velocity, the cumulative wind pressure, the wave pressure and the surface chloride content, as well as the chloride diffusion coefficient are obtained. Finally, the research highlights the cumulative wind pressure which considers the Bernoulli effect and reflects a much real situation than cumulative wind velocity. The result of this research has a significant contribution to the similarity theory and durability evaluation system of seaport wharf.