We went the first week of March 2 years ago, and while the weather was nice, we did wear sweatshirts quite a bit, especially in the evening. I'd bring one for each of you (unless you want to buy one there) and just wash it mid-trip. We did have nice days, though....even relaxed by the pool at the BC. We're going this year at the end of March, so I'm hoping it'll be a bit warmer then. Have fun!!!