Yeah, but you have the advantage of having the water to yourself. I snuck out on a 50F degree day, and only saw a few other boats. It was clear, bright and sunny, and the winds were light and variable. It made a great learning environment without having to dodge everyone else. The days are short though, and the sunset can catch you unawares if you aren't paying close attention. It goes from bright to black in a hurry.
PDQ's blog is full of great advice. Had I read it before-hand, I probably would have harnessed up. The part about winter sailing clothing was also enlightening.
S/V Old Shoes
1973 Pearson 30 #255