i think the address is 171-399 n. harbor dr, redondo bch, 90277. there are several restaurants in that area. you can park in the lot there.
there is a restaurant called "Polly's on the Pier"; facing the ocean from the parking lot, go RIGHT past the pier down a paved road. you'll come to a simi launch ramp/dock. you can use that to launch your kayak. you'll need to slide it across the dock to get it into the water.
there really isn't any beach to launch from. make sure that your yak isn't too overloaded b/c it is a bit scary if you haven't done this before.
here is a map
http://maps.google.com/maps?q=233+N+...ed=0CBMQ8gEwAA
from the map you can zoom in and see Polly's and the small dock area that i had mentioned.
good luck