If your into cars (hotrods), free carshow every Saturday morning in Huntington Beach at a donut shop called Donut Derelicts. Corner of Magnolia and Adams. Just a show and shine, but usually a good showing and good mix of cars. Get there early, it starts clearing out 6:30-7am.
Donut Derelicts - The Official Site
If your into outdoor activities: Long Beach and Huntington Harbor rent kayaks and stand up paddle boards. Cool harbors to cruise around any time of year.
Also in Long Beach, you can rent bikes at several spots and ride along the beach path. Not too far and some good sights (Queen Mary). When your done you can walk to the Long Beach Aquarium or the Pike in downtown has tons of bars/resteraunts.
Drive to the top of Hill St, in Signal Hill for views from HB to Catalina to downtown LA. Freebe! Fun fact: Signal Hill is the only US city located within another city, completely surrounded by Long Beach.
I live in and Love Long Beach, can you tell?
Check out the Long Beach State Pyramid. Bluff Park in Long Beach overlooks the ocean then head down to 2nd street for some good eats. An after dinner walk around the Naples canal is nice as well.
If you head to LA, check out Staples Center, Dodger stadium, and Griffin Park has some nice hiking trails.
What am I doing typing? I should go do some of this. I love living here!