Seabrook island is located in Charleston county South carolina with a geographic area of 5.9 square miles. The total population in Seabrook island is 1,810 with 48.2% male and 51.8% female. Children under age 5 represent 0.6% of the population, under age 18 equal 1.7% of the population and over age 65 is 62.9% of the population. The median household income is $100,265, per capita income is $85,123. There are a total of 1,047 housing units with 94.8% owner occupied. Education includes 4.7% of residents that are high school graduates and 82.0% with a bachelor's degree or higher. The average temperature in Seabrook island in the summer is 77 degrees, and in the winter 43 degrees.