The Pole scooped the bronze thanks to his fourth-place finish in the final event of the season, in Yokosuka, Japan, on Tuesday, Polish state news agency PAP reported.
The gold went to Italy's Matteo Iachino and the silver to Amado Vrieswijk of the Netherlands, according to the Professional Windsurfers Association (PWA).
Poland's Rutkowski last year won the world title in the men's slalom, the PAP news agency reported.
(pm/gs)
Source: PAP, polskieradio.pl, PWA World Tour