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 St George Island sea temperature is 24.5 Â°C. Statistics for 20 Apr (1981â2005) â mean: 21.6 Â°C, range: 19.8 Â°C to 24.7 Â°C. Warm in and out of the water temperature at St George Island today, but forecast to be overcast.