Stockholm to Tallin

I've done that cruise, and also the Stockhom to Helsinki cruise. They are pretty big ships, and it was a smooth ride both times. -- did not bother me at all. The only time I've gotten seasick before is on a small boat on rough seas (Dingle Peninsula to Great Blasket Island). I'm not sure what this means for you, but that was my experience.

Why take a chance? You're looking at an overnight crossing. If the weather happens to get bad, you're in big trouble. And the Baltic Sea is not exactly famous for good weather. As a seasick person myself, I wouldn't try it, no matter how much Bonine or Dramamine I had. I've done the Helsinki-to-Stockholm Silja boat on a smooth sea in good weather, and the boat still had roll to it.

Here's my seasick tips: 1. The theory I subscribe to (from a biology teacher of mine) is that you get seasick because your body is fighting the motion. Your bloodsugar s quickly because of the energy you are using, making you nauseous. That's why people eventually get their "sea legs" and stop getting sick, their body stops fighting the motion and relaxes. 2. There are a couple of medical ways to fight seasickness. Pills supposedly work but make you drowsy (a nap on the boat isn't a bad thing). I've never tried patches but I think they're essentially the same as pills. There is also a wristband - I have no idea why it would work but people say it does. 3. Going back to the original theory, how do you keep from getting sick? First, try not to fight the motion. Sit somewhere with fresh air, a good view of the horizon (to put the boats motion in perspective). Sit deep in your chair with your feet on the floor, arms on arm rests and consciously try to relax. Don't eat sugary treats but snack regularly on healthy snacks to keep your blood sugar up (carrots are supposed to be the best) and don't skip meals. 4. Catch a boat on a good weather day. We cruised the Baltic last summer. Most days were calm. On the big cruise ships with stabilizers, you really have to think about it to notice any movement. We had one day with gale winds and large waves that was pretty bad, we ended up just going to bed because there wasn't much else you could do.

The ships used on this route are cruise ship sized vessels with stabilizers. I wouldn't stress out about sea sickness...it's only an overnight crossing, 12 hours, and you'll be sleeping through most of it.

Concur that these are essentially small cruise ships - not large ferries. That said, if the weather is bad and you are sensitive, you will probably feel it. But under normal conditions I'd be surprised if you did.