Callawassie Island Real EstateCallawassie Island is located in South Carolina. Callawassie Island, South Carolina has a population of 9,211. The median household income in Callawassie Island, South Carolina is $69,534. The median household income for the surrounding county is $60,603 compared to the national median of $57,652. The median age of people living in Callawassie Island is 68.4 years. Callawassie Island WeatherThe average high temperature in July is 91.6 degrees, with an average low temperature in January of 39.3 degrees. The average rainfall is approximately 48.3 inches per year, with 0 inches of snow per year. Callawassie Island MapReal estate near Callawassie IslandNearby CitiesNearby Cities Homes for Sale |