Surfing New Zealand chief executive Greg Townsend said: "Raglan is a world-class surfing destination - it's always been in that top 20.
"It's got consistency - it breaks a lot, that's why it's an attraction. It's got world-class breaks, a nice town and a great surfing culture."
He said Manu Bay's listing by such a widely-read source of news and information would inevitably attract surfers to New Zealand.
Former professional surfer Daniel Kereopa, 35, who runs a stand-up paddleboarding and surfing school at Raglan, said Manu Bay was a great wave, but, "I wouldn't call it one of the best waves in the world".
Asked for his best-in-New Zealand wave, he said, "It's a secret", but went on to suggest it was south of Dunedin.
South Coast Boardriders secretary Grant Godbaz, a former Raglan surfer, said Manu Bay "would definitely be one of the top 50 in the world". He reckoned the breaks at Shipwreck Bay, near Ahipara in Northland, were as good, but less consistent.
"Papatowai only breaks once or twice a year. It's one of the best big-wave spots in the world."
CNN surfing top 50
1 Pipeline, Oahu, Hawaii
2 Supertubes, Jeffreys Bay, South Africa
3 Teahupo'o, Tahiti
4 Uluwatu and Kuta, Bali
5 P-Pass, Pohnpei, Federated States of Micronesia
17 Manu Bay, Raglan, New Zealand
41 Surf pool, United Arab Emirates
50 Eisbach river wave, Munich, Germany.