You'll have to head on over to the beach for some surfing, but happily the coast is only 15 miles away.
For a beginner, Venice Beach in Venice, California or Topanga Beach in Malibu, California might be your best bet. The waves at both these beaches are pretty mellow, and take well to a long board.
2700-3100 Ocean Front Walk
18700 Pacific Coast Hwy
For an experienced surfer, Manhattan Beach in Manhattan Beach, California, is the place to be. The swells are big and attract a lot of seasoned board riders.
400-500 The Strand
Manhattan Beach, CA
You can hardly leave the house without running into a celebrity in Los Angeles, but if you want to go out of your way, there are a few celebrity hangouts where you might be able to happen upon a celeb encounter.
Robertson Boulevard is home to Kitson and The Ivy. Kitson is a boutique frequented by the likes of the Kardashians and Jennifer Lopez. The Ivy is situated in a cozy cottage and this restaurant is a popular haunt for celebrities. George Clooney, Jennifer Aniston, Kim Kardashian and Luke Wilson have been known to frequent The Ivy.
Marina del Rey
Taking up over 800 acres (half of which are underwater), Marina del Rey is a a boating community with over 5,246 boat slips, 600 condos, 5,445 apartments, and 6 hotels. Constructed in the late 1950s, Marina del Rey is nestled in between Lincoln Boulevard, Washington Boulevard, Via Dolce, Ballona Creek, and the Pacific Ocean.
Among the attractions are canals influenced by canals in Venice, birdwatching, a multitude of beaches, biking, fishing, golfing, and hang gliding.
The City of Los Angeles has a great aquatics program that operates 38 seasonal swimming pools, 16 year-round swimming pools, in addition to 11 open-water facilities. At the open-water facilities you can take place in paddle boating and other small craft activities. More information about their aquatic program can be found on their website.