Plenty of my times alongside San Francisco Bay are airplane or wildlife related.  You do get to see lots of other things on the bay, though, and on a windy day the sailing is definitely worth a look.  Having grown up in a sailing town, I do love to watch sailing, even if I never got into sailing myself.  A lot of boats were out on this day.  I don’t know whether they were racing officially or just were out testing each other but they were certainly getting some speed on.  Watching the sails full of air with the boat healing over dramatically and making good speed is really cool.