So Sad Summer's Over!

I will be 57 in December, and I weigh 180. I dropped from 201 to 168 using Atkins two and a half years ago, but I have been hovering around 180 for the last year and a half (this must be my natural weight zone). I can't stand hi heat and humidity, but if I can cool off in the pool, then I do alright. I like winters (I lived in Alaska for three years when I was a kid), but summers are more fun.