The Science Association at Sumedha College, Gampaha, is a vibrant and active group dedicated to fostering a love for science among students. The association organizes various activities, including workshops, seminars, and science fairs, to encourage scientific inquiry and innovation. It provides students with opportunities to explore different fields of science through hands-on experiments and projects. This engagement helps students develop critical thinking and problem-solving skills. The association also participates in inter-school competitions, promoting a spirit of scientific excellence and collaboration​ 

The Science Association at Sumedha College, Gampaha, recently organized a Science Day and an inter-school quiz competition. These events aimed to stimulate interest in science among students and encourage healthy competition between schools. Science Day included various activities and exhibits that showcased students' scientific projects and experiments. The inter-school quiz competition tested participants' knowledge across different scientific disciplines, promoting a deeper understanding and appreciation of science. These initiatives highlight the association's commitment to fostering a strong scientific community within the school.