We have found that a large majority of our guests experience little-to-no seasickness. One of the main reasons for this is the size and stability of our catamarans, which are not as affected by rough seas when compared to smaller monohulls.
For guests who have experienced seasickness in the past, it can help to take Dramamine (or use a medicinal patch) for the first few days. Weather permitting, you can also speak to your captain about sailing the Saronic route, which typically brings calmer seas and shorter sailing times.