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 weather on Harbor Island is exceptional. Average high temperatures are in the mid 70s and 80s and lows are in the mid 60s and 70s. Monthly rainfall in prime season is less than 4. Ocean breezes keep you comfortable both day and night.