Portsmouth Harbour railway station is a railway station in Portsmouth, England. It is situated beside Gunwharf Quays in the city's harbour, and is an important transport terminal, with a bus interchange and ferry services to Gosport and the Isle of Wight. The station currently has four platforms in use: numbered 1, 3, 4 and 5. It is managed by South West Trains. Platform 2 is no longer in use.