Hi Becker,
We made the trans Atlantic repositioning cruise on the Millennium last year, and enjoyed it so much that we are making the west bound trans Atlantic on the Constellation this year. We went to St Martin instead of Bermuda so we were somewhat south of where you will be crossing. We had great weather and mostly smooth seas last year and also on RCI's Splendour when we made the same crossing a few years ago. You will be crossing late in the hurricane season so you will probably miss most of the big storms, but there is usually a low pressure system east of Bermuda that could generate some rough weather. You have to realize that you are out in the middle of the ocean and the weather can be somewhat unppredictable. You are on a great ship and the itinerary is very interesting, if you enjoy the sea days, as we do, you are in for a great experience.
Peter