We have stayed in December and now travel every year in February. We always pack our suits and use the pools. I am from Michigan so if it is 65 degrees outside at the pool, it is still 65-80 degrees warmer than the weather I left. Also, the pools are heated at least to 80-82. Three years ago in December, my wife and I were in the pool. The three lifeguards were wearing a winter coat, mittens, leggings, a scarf and a woolen hat. I swam up to one of the lifeguards and asked him how he could possibly save my life if I start to drown wearing all of that clothing. His reply was priceless, "Sir, the water depth is 4.5 feet, stand up". I laughed for the rest of the day. Just bring a robe to wear as you walk back to your room and you will be fine.