However, his skills were enough and with a training regime like his, it's no surprise.
Boles trains up to nine times a week for two hours each session and has done so for about three years, which has no doubt helped his success in the sport.
He is both a pool and open water swimmer but says open water racing is his preference because "there's a lot more facets to the race".
Last year the Swim Rotorua open-water specialist reached his sporting highlight to date - representing New Zealand at the Oceania Swimming Championships in Papua New Guinea. There, he secured New Zealand's first medal at the champs in his international debut, securing a bronze medal in the 5km race around Port Moresby harbour, before securing a second bronze at the same competition in the 10km open water race.
Boles, who has been swimming with Swim Rotorua for about five or six years but started the Learn to Swim programme since the age of six, doesn't have any major events to qualify for this year.
"I'm just taking it a race at a time," he said.
Boles says he likes to do as many Rotorua and Bay of Plenty swim events as he can and next up is Rotorua's Legend of the Lake on March 16-17. He won the 2018 3.3km swim event.
"I try and do most of the events in Rotorua and then ones that are nearby," he said.
The winners:
2.6km results:
1st man: Davey Boles, 20:55
1st woman: Sierra Thomas 23:06
Amphibian results:
1st man: Connor Farrell 25:14
1st woman: Isabella Webb 28:56