St Joseph's exists to serve the needs of the children in the Catholic Parish of Exmouth. Mass is celebrated regularly in school with both whole-school and class masses. Daily assembly is held and provides an opportunity for prayer and reflection on religious themes. The children are given regular instruction in each class, following the 'God Matters' framework. Sacramental preparation is parish-based.

In St Joseph’s school, Religious Education is provided in accordance with the rites and teachings of the Catholic Church. The syllabus, schemes of work and core RE programmes are used with the approval of Bishop O'Toole through his appointed advisers. While Religious Education has a particular place in the timetable, it also underpins and is reflected in all areas of the curriculum. The Worship which takes place reflects the life and worship of the Catholic Church and, at the same time, respects the journey in faith of the individual. Each day, staff and pupils gather together for worship. They do so either as a class, a Key Stage or as a whole school.

Parents should inform the Headteacher if they wish to withdraw their child from RE lessons or collective worship.