But it was his supporters that he really wanted to say goodbye to.
"I just really want to say thank you to all the fans out there. It's been awesome," the 30-year old said.
"It's been a pleasure to have your guys' support over the years, and moving forward as well.
"It's going to be a new challenge moving to London Welsh. I'm looking forward to it and no doubt you'll see my cheeky smile somewhere along the social media airwaves.
"I just wanted to thank you, and chur."
Last month, it was revealed that Weepu, one of the cult heroes of the All Blacks' 2011 World Cup winning side, had signed a two-year contract with London Welsh.
He will join the recently promoted club next month after 11 seasons of Super Rugby, eight of those at the Hurricanes before moving to the Blues.
Weepu, playing in his third and final season with the Blues, was diagnosed with a hole in his heart after suffering a stroke earlier in the season. He had surgery and returned to the field weeks later.
He made his All Blacks debut in 2004 against Wales in Cardiff before missing out on the 2007 Rugby World Cup squad.
He was a vital member of the 2011 winning squad however, taking over the kicking duties after Dan Carter and Colin Slade suffered tournament ending injuries.
Weepu kicked seven from eight in the quarter-final win over Argentina, followed by a further four penalties in the 20-6 semifinal win over Australia. His last test was against France in New Plymouth last season.