Several studies have focused on groundwater flow within barrier islands and how it’s affected by tides and storms. However, predicting the hydrological response of a barrier island’s surficial aquifer to dynamic tidal and storm conditions remains a challenge. This thesis aims to bring more insights into the effects of precipitation, evapotranspiration, tides, and storm surge on the water table of a barrier island’s surficial aquifer. Water levels in ponds, used as a proxy, were monitored on Sapelo Island and the significance of the aforementioned variables was assessed through cross correlation and wavelet analysis methods. The data show that all variables have a consistent effect on the water table, with precipitation and storm surge having the strongest effect and the spatial location of the ponds controlling the overall response to tides. In particular, the water table increases rapidly following a sustained high tide from storm surge coupled with significant precipitation.