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.
Sea Island, Georgia. Sea Island is a privately owned, unincorporated area of Glynn County, Georgia; and is part of the Golden Isles of Georgia, including St. Simons Island, Jekyll Island, Little St. Simons Island, and the mainland city of Brunswick.