My son and I visited several times to Kailua beach and Lanikai beach which are both very nice and not crowded. The marine base looks like a turtle from those beaches.
If you enjoy having the ocean waves pound you right on to the beach when boogie boarding, pay a visit to Sandy Beach park. I've noticed on several occasions that an amulance was standing by in the parking lot. It is still fun to stop and watch the young people letting themselves get beat up.
