There were no wave investigations, and few data on the Huanghe River Delta offshore area were available before 1984. Since then about 5 years investigation in the sea area around the 5# pile was started to provide scientific basis for development of the area’s petroleum and natural gas resources, expansion of communication transportation, port construction, etc. Eight or more times of 15 minutes running recording measurement were made daily at 6m water depth in strong winds, yielded wave data (on 31 typical strong winds directed mainly N to NE) analysis of which was important for clarifying wave characteristics (such as distribution of individul wave heights and periods and their correlations ) and showed that: 1) Shallow water wave heights and periods follow Weibull distribution, 2) Wave height and period are not independent because the correlation coefficient is 0.42, and 3) Shallow water waves. have. Clearly regional characteristics.