Jersey overcame Channel Island rivals Guernsey 30-18 to secure their third consecutive title in the 25th annual petanque inter-insular.
The result levels the overall series at 12 wins each, with one draw.
Jersey raced into a six-game lead by the lunch break before play was switched to a different terrain because of a waterlogged surface.
The contest was closer after the interval but a strong final round helped the hosts clinch the title.
Jersey have now won for the past three years and team manager Derek Hart said: "We had a fantastic day despite the weather.
"That's put us level-pegging so next year in Guernsey it's going to be a real needle match I suspect."
Guernsey's team manager John Cuthbertson said: "We always enjoy the day and we don't cry if we lose.
"We haven't matched Jersey's growth by a long way.
"In Guernsey we have a problem getting the youngsters involved."