Seabrook is located in Harris county Texas with a geographic area of 5.3 square miles. The total population in Seabrook is 13,849 with 48.7% male and 51.3% female. Children under age 5 represent 6.7% of the population, under age 18 equal 23.1% of the population and over age 65 is 12.0% of the population. The median household income is $89,885, per capita income is $47,871. There are a total of 5,368 housing units with 55.0% owner occupied. Education includes 11.7% of residents that are high school graduates and 45.3% with a bachelor's degree or higher. The average temperature in Seabrook in the summer is 83 degrees, and in the winter 49 degrees.