The 2013 NASCAR Whelen Southern Modified Tour was the ninth season of the NASCAR Whelen Southern Modified Tour (WSMT). It began with the UNOH Battle at the Beach at Daytona International Speedway on February 19, which did not count towards the championship. The first race for the championship was the Charles Kepley Memorial 150 at Caraway Speedway on March 16. It ended with the Southern Slam 150 at Charlotte Motor Speedway on October 10. George Brunnhoelzl III, who entered the season as the defending Drivers' Champion, would win his fourth and final championship in the series, thirty-one points ahead of series runner up Kyle Ebersole.