We stayed at the Hyatt last January, before our cruise and LOVED it! If I weren't traveling with a group of others, I might've stayed there again. When I went, it was mid-January and we went swimming in the outdoor pool. No indoor pool, don't think there's an indoor hot tub, unless it's in the exercise room area. Don't know if kids are permitted in the pool, but there wasn't anyone there watching. There are 3 jets that come out of the side of the wall and shoot down into the pool. They weren't working and j u s t as we started to get out, a maintence man came and turned them on. Wished he had done it before because they were fun to play in. The air was warm enough, but the pool was warmer.
Of course, you could get an off day and have it be cool out, but at least go check it out.
Have fun!