Grosseto to Siderno trains might be a good value for money solution: travelling in Italy by train is often rather cheap and faster than taking a bus indeed Trains leave from Grosseto and arrive at Siderno every about 2 hours on average. If travelling with Trenitalia, you need to know the Grosseto to Siderno train schedule: the first train leaves at 04:19, while the last ride is at 20:29. A Grosseto to Siderno train cost about 72.5 €. But how long is the train ride from Grosseto to Siderno? Your journey takes about 11 hours on average.