The Niners clinched the second seed in the NFC playoffs on Sunday as they thrashed the Arizona Cardinals 38-13 in their regular-season finale.
San Francisco will face arch rivals the Seattle Seahawks in the opening Wild Card round matchup on Saturday, in which they are heavy favourites having swept the Seahawks in the regular season.
The 49ers' winning streak has been made all the more remarkable by the fact much of it has come with Purdy, who began the season as their third-string quarterback, under center.
Purdy came in for Jimmy Garoppolo, who had been enjoying the best season of his career after replacing the injured Trey Lance in Week 2, when Garoppolo suffered a broken foot in the first quarter of the Week 13 win over the Miami Dolphins.
The seventh-round rookie, the last pick in this year's draft, has since won all five of his starts, across which the 49ers have averaged an NFL-leading 33.6 points per game.
Yet alarmingly for the Seahawks and any future 49ers playoff opponents, Purdy still sees room for them to grow.
"I feel great. I feel like everyone else is feeling great," Purdy told a post-game press conference. "When you're on a roll, you're on a win streak, you feel like, man, the groove and how we're playing together, it feels really good when we're on it.
"I think a lot of us are real with ourselves too though. I feel like we still haven't played to our full potential yet.
"And so, we look at it as a challenge, but we're also excited because it's like, man, if we do play to our full potential, what else could we do?
"So, those are the kind of things that we ask ourselves every day and we're excited about. But I'm excited moving forward for being on a win streak."