How long does it take for a cruise ship from Athens to Rome to get seasick?

The cruise from Athens to Rome takes about one day and one night, depending on the speed of the cruise.

Generally, large sightseeing boats and cruise ships are definitely much better than ordinary boats;

Generally speaking, large international cruise ships are not particularly wobbly, especially inland. Most of the time, it feels no different from that on land, but the weather is a little wobbly when it encounters wind and waves.

As for whether you will get seasick, it depends on your physical fitness. Some people don't get seasick, and some people get seasick at the slightest flash. Other ships have not been studied, so I dare not talk nonsense. If you are seasick on a cruise ship, there is free seasickness medicine.

And if the weather changes, the cruise ship can get the weather forecast very early, which is very accurate. Eating a green apple and free seasickness medicine is very helpful.