Kaikorai played the percentages and used the conditions better to edge Green Island at Miller Park.
The atrocious conditions saw both sides keeping the ball mainly in the forwards and despite Green Island's best attempts at taking the game wide on the odd occasion, it was the defence of Matt Direen and Bevan Passmore that closed these opportunities down.
Fullback Craig Baird also did some superb cover work at fullback for Kaikorai and proved safe when tested under the high ball.
Kaikorai won the match in the forwards, with outstanding displays from Seko Qaraniqio, Kensak Palepoi and Jim Stevenson.
Halfback Willie Lawson complemented the work of his forwards with some clever tactical kicking.
As darkness descended on Miller Park, it was Stevenson who emerged from the mud with a classic wet-weather try, following a clever grubber kick that pierced the Green Island backs.
His try put the game beyond doubt and gifted Kaikorai the Ken St Clair-Newman Trophy and the Speight's Challenge Shield until next season.
Kaikorai 10 (Jim Stevenson try; Willie Lawson conversion, penalty goal), Green Island 0.
Half-time: 10-0.
Referee: Jeff Grubb
