Waialae/Kahala Beach is just past Diamond Head outside of Waikiki about 30 minutes away. It's convenient, pleasant, and scenic.
The area we use is up the beach about 200 yards, fronting a luxury low-rise condo building.
We do ceremonies on the grass under the shade of the coconut trees and we also use the beach. Both are quite nice. We use which ever area is available and not being used by others consequently, we cannot guaranty and spot or those you may see in our photo samples.
We suggest between 9 am to 12 pm as the best times. For whatever reason, many companies like to do weddings later in the day which leads to congestion for parking and ceremony spots, and it's hotter.
Mornings are cooler and the lighting we like. It's actually good most of the day but, it can be a challenge for people from 2 pm and later with the sun in their eyes.
Finally, parking can be difficult and unavailable no matter the time. You may get lucky but, we suggest you use our transportation services or just get a taxi or Uber. If you drive, we suggest leaving before the travel time we suggest on the contract so, you can wait for parking (if you're not lucky) or to give you time to park up the street in the neighborhood.