We took the ferry to anguilla from Marigot april 9. I am a person who gets seasick...and i did not have a problem. It took 20 minutes.

Coming back...there was a storm...and it was rougher...but i still did ok and i did not take any medication,

I guess it is truly an individual opinion....but I have certainly gotten sick in the past...and I did ok this time.

Good luck