Judith Steele Wescott, 72, a teacher of mathematics and science in the D.C. public schools for more than 30 years before retiring in 1966, died of congestive heart failure Monday in a hospital at Port Charlotte, Fla.

She began her public school career at Powell Junior High School in 1933, taught at the old Central junior and senior high schools from 1948 to 1950, and then at MacFarland Junior High. During her years with the D.C. public schools, she received science teaching awards from the D.C. Council of Engineering and Architectural Societies and the Washington Academy of Sciences.

After leaving the public schools, Mrs. Wescott taught for four years at the Academy of the Holy Cross in Kensington before retiring a second time in 1970. A former resident of Silver Spring, she had made her home in Port Charlotte since 1975.

Mrs. Westcott was born in Anniston, Ala., and moved to Washington as a teen-ager. She was a graduate of the old Western High School and was a 1930 graduate of George Washington University. She earned a master's degree there in 1935. She taught at the Maret School in Washington before joining the faculty at Powell.

She was the widow of James B. Wescott, who died in 1965.

Mrs. Westcott was a member of the National Education Association, the D.C. Education Association, and the Eleanor Wilson Chapter of the Daughters of the American Revolution.

Survivors include a son, Dr. Howard Blakely Wescott of Buffalo, N.Y., and a sister, Dr. Sally Steele MacDonald of Silver Spring.

The family suggests that expressions of sympathy be in the form of contributions to the American Heart Association, or to the George Washington University Heart Fund, Department of Cardiology, George Washington University Medical School, Washington, D.C.