Articles about Swimming not being good for weight loss

Hello everyone, I recently happened to have read a few (probably misleading) articles about swimming and weight loss. I have started swimming 3 months ago as a replacement for other cardio exercises due to knee injury. I enjoy swimming greatly but also I want to lose weight. What I read is that because of the cold water the body tends to build a layer of fat underneath the skin to heat the body... that also the body doesn't burn as much fat because the cold water keeps it from heating... and that the cold water causes the apetite to rise. Is any of this scientific? Does it make any sense?