Ferry to Amsterdam

Scandinavian Seaways DFDS (Newcastle to Amsterdam)
Ferry service from Newcastle to Amsterdam. Journey with DFDS Seaways takes 15-16 hours. Sailing at 5:00pm arriving next morning in Amsterdam 9:30am. You may opt for a romantic cruise break, 2 nights accommodation in cabin, with a coach transfer to the Amsterdam city center and a sightseeing tour included. This line now offers themed cruises, for example a Comedy cruise with 3 comedians, whilst taking this route. Check out the website for more fun options.
www.dfds.co.uk

Port address in Amsterdam:
DFDS Seaways, Felison Terminal, Sluisplein 33, NL 1975 AG, IJmuiden, The Netherlands
Tel: +31 255 546650
www.dfds.co.uk

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. 
www.stenaline.co.uk

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).
www.ponsf.com