The patron of Robecco sul Naviglio is Saint John the Baptist, celebrated on the first Sunday of September with a procession and folk events, in the Church of San Giovanni Battista.
On the first weekend of July, the «Festa del Gerusco» is held, a beer festival organized by the town's young people with the Pro Loco; on 1 May, instead, the Fiera di San Maiolo takes place, dedicated to agriculture and livestock. Every fourth Sunday of the month, except August, the Fiera del Naviglio Grande is also held. The town also holds the Naviglio Grande Museum and Villa Scotti.
