The 21-year-old penned a long-term contract at the beginning of the year but has now extended his commitment. His news follows on extensions for fellow homegrown teammates Liam Belcher and Ben Thomas.
“I’m so happy to extend my contract and cannot thank the club enough for the opportunities I’ve been given. I just want to thank Cardiff by performing on the pitch,” said the nine-times capped Winnett.
“I absolutely love playing at the Arms Park and really enjoy being part of a very good group of players, who are building and developing together.
“I just want to keep improving and as a group to keep building on what we have been doing in the last two years. I want to make some big memories in a blue and black jersey.”
Winnett came through the Cardiff Rugby pathway, progressing from Treorchy mini and juniors to the Blue & Blacks age-grade sides. He made his senior debut against Harlequins in 2021 in the Investec Champions Cup, scoring a try in the process, when the majority of the first team squad were in quarantine.
The full-back continued his development with Cardiff RFC and Wales U20 and broke into the first team in the 2023-24 season. He was virtually ever-present, making 17 appearances and impressing throughout.
That fine form saw him called into the Wales Six Nations squad and he has remained in the No 15 jersey ever since, also earning acclaim with the Welsh Rugby Writers’ Young Player of the Year award.
Head coach Matt Sherratt has been delighted with Winnett’s progress through the ranks and believes he has a big future with the club.
“While Cam only signed a long-term contract in the summer, his form and continued progression warrants a new deal, and we are thrilled to extend his stay further.
“He is a top-quality player and person, who has a great skill set, is very professional and does not get fazed. He is also a homegrown lad that grew up supporting the club and progressed through the pathway here.
“He is now playing with a lot of the boys he came through with as well as some he used to look up to and I know how determined he is to bring success to the Arms Park. He has a big future here and in the game in general.”