High waves (winter swells) are generated during the winter months from November to April as a result of extra-regional storms, affecting the Eastern Caribbean islands. During the winter months (November to April), very intense low-pressure systems in the North Atlantic Ocean generate storm waves, which travel south as swells to affect the island. While the waves are experienced on the north, west and east coasts, the most severe effects are felt on the west coast since these experience only low wave energy for most of the year. The south coast beaches also experience erosion during this period from the indirect effect of wrap-around waves from the west and east coasts.