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.
Today's Sea Island sea temperature is 86 Â°F. Statistics for 28 Aug (1981â2005) â mean: 83 Â°F, range: 81 Â°F to 84 Â°F. Very warm air temperatures and very warm water(86 Â°F) too at Sea Island, warm enough for wearing board shorts and a rash vest in the surf. Cloudy, but feeling very pleasant in and out of the water. (click thumbnails to expand) Below is a graph of Historical Sea Surface Temperature for Sea Island.