SF Bay is an amazing place to paddle. Lots of interest and some 'challenging' conditions resulting from complex bathymetry, strong tidal flows, and strong winds. The water varies from very cold to bloody freezing - dress for immersion!
If time is tight and you don't want to drive too far, then Seatrek in Sausalito (
http://www.seatrekkayak.com/pages/renta ... entals.htm) is the closest place to the City. There is also CCK in Jack London Square, Oakland (
http://www.calkayak.com/), however, they don't have as ready access to the variety of sea kayaking that you have from Sausalito. Wherever you end up in the Bay, take note of tides (
http://www.tidesonline.com/) and weather (
http://iwin.nws.noaa.gov/pub/data/text/FZUS56/KMTR.TXT) as these will determine where you can paddle!
A couple of good trips on the Bay are:
1. From Sausalito to Belvedere Point or Tiburon Point, ferry glide across Racoon Strait and circumnavigate Angel Island. Good tide rips, interesting coastline and great views of the City.
2. From Sausalito to Yellow Bluff, Horshoe Cove and out under the GG Bridge; and on to Point Bonita if time allows. Excellent Franciscan coastline and Yellow Bluff is a great place to play when the tides are right!
If you want to travel a wee bit further afield, then Blue Waters (
http://www.bwkayak.com/) on Tomales Bay or MBK (
http://www.montereybaykayaks.com/retail/index.php) in Monterey are also recommended as places to rent kayaks and have direct access to some superb paddling.
If you are looking for a paddling partner, then send an email to BASK (Bay Area Sea Kayakers
http://www.baskers.org/frame.html) at
info@bask.org. There will nearly always be someone willing to go for a paddle on the Bay.
If you need any more detailed info, send me a PM. Also, there is an article in a recent Sea Kayaker on paddling on the Bay. If you want I can scan it and send it to you.
Enjoy your trip to SF.
Cheers,
Clark