Fairfax Media’s Stuff website has surveyed the top beaches in New Zealand’s North Island and declared Raglan to be the top beach. The article says, “This is a bit of a cheat, because there are three beaches at Raglan (four if you count the estuary)”. The main three that they mention are Ngarunui (Ocean) Beach, Manu Bay and Whale Bay.
You can find all about Raglan’s beaches at https://www.raglan23.co.nz/about-raglan/raglan-beaches/