If your using the Hovercraft, Fastcat or the Fishbourne Car Ferry, you have to pass through Portsmouth. If you have some time why not explore the city. There is the outlet shopping centre Gunwarf Quays, which has many well-known shops with large discounts. There is the Spinnaker Tower that offers views of the harbour, the Solent Forts and the Isle of Wight. There is also the Portsmouth Historical Dockyard, where you can see the remains of the Mary Rose, HMS Victory and many other naval attrations.
Further round the coast you have Southsea where you can visit Clarence Pier and the Blue Reef Aquarium
Blue Reef Aquarium
Portsmouth Historical Dockyard
Gunwarf Outlet Centre
South West Trains service to London.
International Ferry Terminal .
Wightlink Foot Passengers/Car Ferry.
City Bus Service.
Hovercraft service to Ryde