Hi!! We were at the BC last January ( the last week into Feb.) and my kids swam either 2 or 3 different nights. The first 2 days were kinda cool and damp, but after that it warmed up. I don't remember if that quiet pool is heated. I didn't swim because I was doing laundry--which is right next to the quiet pool---worked out great. Dh would swim, then get in the hot tub. So, I guess it was ok--the kids didn't complain. They won't swim if it's really cold.