An amount below 100 means Dayton, Ohio is cheaper than the US average. A cost of living index above 100 means Dayton, Ohio is more expensive.
Sea Island, GA Weather. The average temperature of Sea Island is 67.50Â°F, which is much higher than the Georgia average temperature of 62.30Â°F and is much higher than the national average temperature of 54.45Â°F. Historical Weather.
Tybee Island average April sea temperature. Max: 22.4Â°C / 72.4Â°F. Avg: 18.5Â°C / 65.3Â°F. Min: 15.2Â°C / 59.3Â°F. These figures are calculated from several years of recorded data and are the maximum, minimum and average temperatures of all the recorded years. Average daily April sea temperatures. Monthly Tybee Island water temperature chart.