You don't have to have a strong religious faith to appreciate the tranquil atmosphere of Nampula Cathedral. Check when the next service starts or when you can go for a wander through.
You'll have no end of sightseeing choices when visiting Nampula. Nampula Cathedral is an ideal place to start here, but there are many other fine spots to discover. Catedral de Nossa Senhora da Fatima, Nampula Stadium, and Cathedral of Nossa Senhora de Fátima are close to the principal church and will round out your day nicely.