Wave distribution characteristics of the southeast coastal area of Guangxi are discussed based on the analysis of one year’s observed wave data from Guangxi Beihai offshore sea area.The results show that the annual average H1/10 is 0.6 m regardless of direction,and the most frequently occurring direction is WSW with a corresponding frequency of 15.48%;during observation period,Hmax is 8.23 m with a ESE direction and a corresponding H1/10 of 6.26 m that was recorded during the typhoon 201409 Rammasun;the joint distribution of wave height and period of the area is similar to oblique triangle distribution.Using the least squares regression analysis method,we establish the correlation between each characteristic wave height and mean wave height of the research sea area.