There's usually a fireworks show from the Santa Monica Pier
and another one inside the Marina Del Rey Harbor. That's what I remember.
It's been a few years since I've been out on New Years Eve to watch'em.
It varies from year to year. I recall one year Santa Monica had an afternoon "celebration" because it was concerned that fireworks would be too "aggressive." One year, there was a magnificent fireworks display right off the marina jetty (by the boat houses), and unlike July 4, only a handful of people ewere there.
I would contact the Marina Harbor master or the LA County Supervisor's office and ask if there's going to be a display this year.