Trains depart from London's Waterloo Station several times daily. The trip takes a little more than an hour. Call tel. 0845/748-4950, or visit www.nationalrail.co.uk.
National Express operates hourly departures from London's Victoria Coach Station. The trip takes 2 1/2 hours. Call tel. 0871/781-81-81, or visit www.nationalexpress.com for information and schedules.
If you're driving, take the M3 southwest from London.
The Tourist Information Centre, 9 Civic Centre Rd. (tel. 023/8083-3333; www.visit-southampton.co.uk), is open Monday to Saturday 9:30am to 5pm, Sunday and bank holidays 10am to 3:30pm.