I went in November 2012 and wore both my fleece and my swimsuit, LOL. The sun was warm mid-afternoon and we had a couple of great pool afternoons. The evenings were cool, but not cold (to us, from PA). I mostly wore capris with a t shirt, and a sweatshirt early a.m. and after dark. One night it was cold enough for fleece.
I packed hats and knit gloves, but we did not use those. We went for 7 days, I packed about 3 days of cold weather clothes and 3 days of warm weather clothes. I did one load of warm weather clothes laundry mid-week.