Lewes, Delaware Breakwater Harbor tide charts for the year 2017. All tides are predicted so they can be off due to wind, storms, and location. Keep in mind back bay tides are not the same times as the ocean tides. You will have to add or subtract time for the corresponding back bay tides. Be sure to check the moon phases to help plan your trips. To get an accurate idea of the tides for Rehoboth Beach, Dewey Beach, and Fenwick Island. Refer to the . . .