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.
How warm / cold are seas during the summer and winter? Sea temperatures along our beaches range from 56Â°F/13Â°C in the winter to 86Â°F/30Â°C in the summer! The sea temperatures along the Atlantic beaches several degrees cooler in the summer than those along the Gulf coast. See our Florida Weather page for more information.