The patroness of Grotte is Saint Venera, whose feast falls on 14 November.
The cattle fair is instead held for the feast of the Madonna delle Grazie, in the first week of September. The Easter celebration is also deeply felt, beginning on Palm Sunday and concluding on Easter Sunday, when the whole Passion of Christ as described in the Gospels is re-enacted, with processions involving the entire town. The town also holds the church of the Purgatorio and the church of the Carmelo.