Last Wednesday we did the Tiko Tiko cruise to St Barts. There were 16 of us. I had heard horror stories too on the sea condition when crossing the stretch of the Atlantic between St Martin and St Barts. However, this had to be a top 10 crossing as it was very calm and smooth. The seas were only about 3 foot swells and we had a very smooth sail. It was about a 2 1/2 to 3 hour crossing and we arrived around 11. We had until about 2:30 to explore before having to be back on board. As previous comments said, you should check the forecast prior if you have any concerns. Just as a final comment, now that I have done the sail over, I find no reason to ever have to leave St Martin to go to St Barts again.