When are you going? We just got back from the Eastern Caribbean route and there is a good amount of weather stirring up the water out there. Captain steered clear of it by day, and our shore excursion were never interrupted but you could see the storms in the distance and watch the lightening at night.
Good chance you will feel the motion. Mostly a gentle rocking that lulls you to sleep at night but some occasional periods of time that makes walking a bit wobbly.