The 27-year-old has 985 points, 15 more than Briton Nick Thompson in second.
“Another dream has become reality this year,” he said. “It reflects my course this year and how successful 2017 was.”
Kontides got first place after winning the silver medal in the Laser Radial Medal Race at the World Cup Series in Gamagori, Japan.
Rio 2016 bronze medallist Sam Meech (NZL) won the gold after battling it out with the Cypriot London 2012 silver medallist.