IMPORTANT NOTICE: On 18th December 2018 Irish Ferries announced that they wish to inform their customers that they are unlikely to operate a service between Rosslare and Cherbourg in 2019. Irish Ferries continue to keep this situation under review.
The Rosslare - Cherbourg sea route is served year-round by two separate ferry companies; Irish Ferries and Stena Line. The overall service level is five to six sailings a week in each direction.
Stena Horizon

Cherbourg ferry terminal (gare maritime) to Cherbourg railway station (Gare SNCF) & vice versa.

Cap Cotentin line 2 provides a link between the ferry terminal and railway station and vice versa. The journey takes nine minutes.
For further details please see the Cherbourg bus info page.
Rail tickets may be booked on a number of websites including
the Train Line
.
For further details please see the Cherbourg bus info page.
Rail tickets may be booked on a number of websites including
the Train Line
.
Gare de Cherbourg (Cherbourg railway station)

Cherbourg station has a ticket office, ticket machines, shop, waiting room and toilets.
Cherbourg - Caen - Paris train

First and second class accommodation is available on the train. There are open carriages (as pictured here) and corridor coaches (with compartments off them).
At seat power points are available (adapter required).
At seat power points are available (adapter required).