Seasonality is a frequent and important occurrence in the tourism industry, with concurrent effects on both the financial and volume flows of tourism. The purpose of this study is to measure pattern, amplitude and timing differences between the seasonal factors of monetary and non-monetary indicators of tourism development in Aruba. The study contributes to filling the gap in the literature on the dynamics in the co-movement of these two types of seasonal factors, with the simultaneous incorporation of three measurement dimensions of this relationship. The methodology involves decomposing time series on both stay-over tourism and tourism expenditure using the Census X-12 technique, with the subsequent calculation of Pearson's correlation coefficients, ratios of amplitudes and timing differentials of peaks and troughs. The results show important differences in the pattern, amplitude and timing of the seasonal factors.