What is this offseason that you guys are talking about? I do surf more during the winter 'cuz that's when the waves are the best around here. Plus snowboarding trips when there are good storms so that I can get some powder!
We have arena softball for the off season. Crazy game. Scoring on both offense and defense, netting on all four sides plus the ceiling, no foul balls and played on turf for the perfect hop. check it out if you are in the Sacramento area. http://www.arenasoftball.com/
When I lived in KY I would play a lot of racquetball. Keeps my hand eye coordination sharp, works my rotational and swinging muscles, and is a great workout. I would also ride my bike to stay in shape. Now I do neither of those and play softball or hit bp daily since the weather is AWESOME in Yuma.