Ferry to Amsterdam

There are many reasons why people choose to travel by ferry. Some want to experience the travel by boat or want a romantic trip on on water. Some want to transport their pet or car, and some simply don't like flying. It is also more enviromentaly friendly because of up to 80% less emissions compared to a flight.

Scandinavian Seaways DFDS (Newcastle to Amsterdam)

DFDS ferry to AmsterdamFerry service from Newcastle to Amsterdam. Journey with DFDS Seaways takes 15-16 hours. Sailing at 5:00pm arriving next morning in Amsterdam 9:30am.
This line now offers also themed cruises, for example a comedy cruise with 3 comedians.

A great offer is 2 for 1 cruise with even coach to and from Amsterdam city included.
Just check this offer: Ferry to Amsterdam webpage.
And if this isn't for your needs you can search their website for other options.
Port address in Amsterdam:
DFDS Seaways, Felison Terminal, Sluisplein 33, NL 1975 AG, IJmuiden, The Netherlands

Stena Line

Harwich to Hook of Holland with easy rail and road connection to Amsterdam. Daytime sailings from Harwich to Hook of Holland aboard the Stena Line Superferry 'Stena Britannica'. Sailing at 09:00 daily and arriving at Hook of Holland at 16:15 Dutch time. There are bars, two restaurants, children's play area & WiFi.  Cabins are optional and are half price on the day crossing.
Sail overnight from Harwich to Hook of Holland aboard the Stena Line Superferry 'Stena Hollandica'. Sailing at 23:45 daily (though you can board well before this and retire to bed early) and arrive at Hook of Holland at 07:45 Dutch time.  All passengers get a private cabin with en suite toilet & shower, soap, shampoo, towels and all bedding provided.  A bar & two restaurants are available, as well as WiFi. 

P&O North Sea Ferries

Hull to Rotterdam with easy rail and road connection to Amsterdam.
With night sailings on two luxury cruise ferries, you can enjoy great onboard entertainment and delicious food choices on board the P & O ferry from Hull to Rotterdam. Comfortable ensuite cabins ensure a restful crossing . Check in 90 minutes before the 9pm departure (either way).