The 29-year-old former Parramatta fullback requested the release through his manager Alan Gainey, which was granted, despite being contracted with the Auckland-based club until 2011.
“We are delighted to have secured a player of Wade’s ability and experience,’’ said Wests Tigers CEO Stephen Humphreys.
“He will be a valuable addition to the squad, particularly as we have a number of injured players at present. There is no doubt that Wade is a quality player and he is keen to re-establish his career with Wests Tigers.
“His attacking style of play and ability to find the tryline will be great assets for us.”
McKinnon has enjoyed very little game time with the Warriors this season due to the emergence of speedster Kevin Locke.
“I feel I have plenty more to offer and can’t wait to team up with a very talented squad at the Wests Tigers ,’’ said McKinnon.
McKinnon will arrive in Sydney this weekend and is likely to be in contention for the round 13 game against the Bulldogs at ANZ Stadium on Friday, June 4.