Snells Beach resident Oliver Trottier has reunited a man from Orewa with his wedding ring, which he lost while surfing. 

The ring fell off at Orewa Beach on Thursday. The intrepid surfer then spent some time trying to find it, but to no avail.

After scolding him for not taking his ring off while out surfing, his wife took to the Hibiscus Coast Facebook group to see if anyone had found a ring, but with no luck. 

Instead, she found a post by Snells Beach resident Oliver Trottier, who has a passion for metal detecting, and had previously found someone else's ring with his metal detector, so she asked if he could help find it.

Happy to help, Trottier spent several hours scouring the beach on Saturday night, but interference from a lightning storm posed a challenge, so he decided to call it a night and try again on Monday.

After about four hours of hard work, Trottier found the ring in a deep hole in the sand.

Asked why he was so willing to spend hours helping outsomeone he'd never met before, Trottier said it was "super rewarding".

He's since been asked to help two others find their rings in the upcoming school holidays. Other cool things he's picked up with his metal detector include a World War I artillery helmet badge, musket rounds and a coin from 1834.

His advice for others who lose things on the beach was to take note of their surroundings, such as any trees they're standing in line with. "It can turn a six-hour thing into a five-minute thing”.