We have been to all beaches west of Auckland from Whatipu to Muriwai. This is one of the most beautiful and wildest beach, with nearly nobody. A gem as other contributors wrote.
The access road to is small, 8 km long, without tarmac but praticable. This likely explain that only few will go. And the end of the road you find the pedestrian trial to the beach. It takes 10 to 15 mn to go down. It is steepy and would be difficult only for elderly or disabled people.
It is really worth to go.
There is not surveillance: swimming and surfing are not recommended
On the road way, you may stop a few hundred meters before to go to the White Beach. The pedestrian access is more difficult and the view is less a pleasure.