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.
The island is located in Glynn County on Georgia's coast and lies east of Brunswick (the seat of Glynn County), south of Little St. Simons Island and the Hampton River, and north of Jekyll Island. The resort community of Sea Island is separated from St. Simons on the east by the Black Banks River.