Is it foggy in the Bay?

Is it foggy in the East Bay? Here's a fog forecast page:

http://www.sfgate.com/weather/fog/fogtopclose.shtml

And some webcams of the bay.  The first one shows the Berkeley Marina directly:

http://sv.berkeley.edu/view/index.html
http://www.mapwest.com/bridgecam_main.html
http://cams.exploratorium.edu:8010/
http://rntl.net/sausalitocam.htm
http://webmarin.com/http://webmarin.com/