That seems appropriate to wear. I packed too many clothes; I didn't go swimming at all (had 2 swim suits), and a few aerobic outfits (didn't exercise either). However, we used the stairs most of the time. At least that was a little bit of exercise. One day I wanted to go around the walking track a couple of times, but found it too windy.
I hope all of you have a good time and enjoy your cruise!!