People like to say that LA doesn't have seasons, but when you live here, you learn that they're just more subtle. Despite the chill, the beach in the winter feels different. The light is different, as are the waves, and even maybe the color of the water. Not to mention the natural quiet and sparsely populated beach. It can be pretty peaceful, and often a refreshing change.
[apologies for blog posts before 1/2009 that are not yet updated to format]