In Newport Harbor, the most effective bait for bass fishing can vary depending on a few factors such as the time of year, the prevalent forage in the area, and the behavior of the bass. However, I can offer some general advice that may help you find success in those waters.
Firstly, considering the structure and typical harbor environment, finesse techniques can be very effective. A weightless stick bait, like a Senko, can be particularly useful when fished slowly around docks, pilings, and other cover where bass might be holding. The subtle, natural fall of a weightless stick bait often entices bites from finicky fish.
If you're targeting spotted bay bass, which are common in harbors, soft plastic swimbaits that mimic local baitfish can be a good choice. You can rig these on a jig head and bounce them along the bottom or swim them through the water column.
For topwater action, especially during low light conditions like early morning or late evening, a walking bait or a popper can draw explosive strikes from bass that are feeding on the surface. Given the typically calmer waters of a harbor, topwater lures can be very effective.
Lastly, don't overlook the use of live bait if it's permitted. Live bait such as anchovies, sardines, or even live shrimp can be irresistible to bass in a harbor setting.
Remember, the key to successful fishing is often adaptability. Start with these suggestions and let the fish's behavior guide you to what they're most interested in on any given day. If you notice baitfish activity, match your lure size and action to what the bass are naturally feeding on. And always be ready to switch up your tactics if one approach isn't producing results.