We cruised last May (18th-25th) and I don't remember what the temperature was. However, I do know that summer clothes (shorts, T-shirts, sun dresses) were perfect most of the time. We did have two nights that were a little cooler because it was windy, so I would recommend taking a light jacket or a sweater, just to be prepared. Also the restaurants and showroom can be a little cool because of the A/C. Hope that helps.