Here are some links for various surf camps that operate in August. The Freedom surf camp is the one I enrolled my son in. It is $90 for the day per person. I think you can do a half day for less but call them to find out. The other camp is a little pricier - $90 for 90 minutes.
http://freeedom.org/surf/
http://www.campsurf.com/los-angeles-surf-lessons/private/#7ee67fe49807ecb69
If you wanted to do something fun after doing the surf camp I suggested in my previous post, you could go down to the Redondo Pier where they have a large fishermans market where fresh fish are sold and there are plenty of restaurants to eat at.