The Descendants was filmed in Honolulu in the United States of America.
Puu Poa Beach
In movie
Scene where Matt and the children walk on the beach hoping to spot Brian Speer.
Real
Scene was shot Pu'u Poa Beach, located on the north shore of Kauai, is mainly used by guests of the St. Regis Princeville Resort and the Hanalei Bay Resort. If you're not a guest at either one of the two resorts, there is a small public parking lot near the St. Regis and a beach access path.The beach has reddish-golden sand and extends all the way to the Hanalei River.