I guess that you are getting a real head start if you are talking about winter SAD. Believe it or not, I get SAD in the summer months. I don't like the summer months that much because of the heat and long daylight. Also it seems less quiet for me. Where I live, it has not been a very hot summer. So at least that's OK for me.

One nice thing about summer with the longer daylight is that I can ride my bike after work. I guess that's the way I get through the summer doldrums for me.