If you're looking for stationary things to do: just hanging out in Golden Gate Park on a sunny afternoon is nice, as is the beach in San Francisco. Hit up the beach across from this surf shop:
WISE SURFBOARDS---HOME and you'll definitely see something worth watching. The last time I was there I saw some really cool displays of kiteboarding. Of course, it's a lot cooler than the beach where you are from, temp-wise. Be prepared for that!
The other nifty beach that's a short drive from where you will be is Pacifica; there's a Taco Bell on the beach and lots of surfers to watch.
Good luck with everything, noodle
