The patroness of Siddi is the Madonna delle Grazie (Our Lady of Graces), celebrated on 2 July.
Between late July and early August, «Appetitosamente» takes place every year in Siddi and the surrounding area, a regional good-food festival organised by the town administration, the VillaSilli cooperative and the local population, in collaboration with Slow Food. The municipality also holds the Museo Ornitologico della Sardegna and the Nuraghe Sa Fogaia.
