This study concerns the possible interrelationships of wave data among wave-measuring stations. This study uses wave records collected at Station Pi-Tou-Chiao (PTC) from 1983 to 1988, and at Station Keelung (KL) from 1983 to 1988. Depending upon the amount of consecutive data missing in the records, three methods were used to estimate their values. The methods used for data completion are: interpolation, ARMA model, and O'Carroll [O'Carroll, F.M., 1984. Weather modelling for offshore operations. The Statistician, 33,[161][162][163][164][165][166][167][168][169] model. Using monthly transfer functions (TFs) between these two stations, the interrelationships of the significant wave heights measured at PTC and KL were estimated, and the records of the two measuring stations were set to have equal lengths. Assessments of the proposed methods were carried out by comparing the mean values, standard deviations, skewness, and kurtosis of both the completed and estimated wave records. The results indicate that the proposed methodologies can be used to fill in data gaps and to transfer data from one station to another-both of these methodologies are needed in the study of oceanographic time series.