The sudden death was confirmed in a joint statement from TVNZ and Boyed's family.
TVNZ's Head of News and Current Affairs, John Gillespie, said in a statement: "It is with a heavy heart we’ve learned our friend and colleague Greg Boyed has died."
The news came as "a huge shock to his TVNZ family".
Gillespie said Boyed had been a "prominent figure in our newsroom for the last 25 years".
"He was a wonderful man and a talented broadcaster who strongly believed in the power and importance of journalism in people’s lives. Greg was known for his wit and warmth and kindness. It’s a very personal loss for us."
Boyed's family also released this statement:
"It is with great sadness that we share news of the sudden death of broadcaster Greg Boyed on Monday, 20 August, whilst in Switzerland with his wife and youngest child."
He was absolutely loved and adored. A treasured son, brother, husband and father, he will be deeply missed."
Several broadcasters have taken to Twitter to express their sympathies for the family.