I asked this right after my trip but never got an answer;maybe it'll catch someone's eye here...
We passed two beaches driving from Diamond Head up to Hanauma Bay, not too far from Koko Marina area. They looked really pretty from the road, but I can't really ID them in a map. One guide mentioned a beach near that area, but said the snorkeling really wasn't great due to residential runoff. I'm wondering if these beaches are those (it did look like highly residential areas), and even if snorkeling is bad, how would beginner-level surfing be there (in the summer)?
Sorry for the uber-vague info; I really didn't realize we'd be passing that close to the coast on that drive, so I hadn't researched it. TIA for any info!