Kaluakoi's northernmost beach is also the best. Kawakiu Beach is a broad crescent beach of white sand and bright-turquoise waters. It's partially sheltered from the winds that can bedevil the beaches to the south and when seas are calm, usually in summer, Kawakiu is generally safe for swimming.
When the surf is rough, there are still areas where you can at least get wet. On the southern side of the bay, there's a small, sandy-bottomed wading pool in the rocks; the northern side has an area of flat rocks over which water slides to fill up a shallow shoreline pool. Spindly kiawe trees provide shade. Outside of weekends, you may well have the place to yourself.
To get there, turn off Kaluakoi Rd onto the road to the Paniolo Hale condos, but instead of turning left to the condos, continue straight toward the former golf course. Where the paved road ends there's space to pull over and park. You'll come first to a rocky point at the southern end of the bay. Before descending to the beach, scramble around up here for a scenic view of the coast, south to Papohaku Beach and north to ʻIlio Point.