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.
Warmed year-round by the Gulf Stream... Hilton Head Island's average daytime air temperature is 70, and the average annual ocean temperature is 69. Monthly averages are summarized below. The most authoritative perspective on the weather comes from National Weather Service, with links below.... Beaufort current conditions.