Other forms: off-seasons
Anything with a season also has an off-season. Summer marks the off-season for skiing, and winter marks the off-season for most amusement parks (unless, of course, you live in Orlando, Florida).
Off-season is often the time of the year when tourists don't visit, or when sports fans have to take a break from their favorite games. In seaside resorts, the off-season is the summer. During the off-season, visitors are sparse and sometimes businesses offer discounts to attract tourism. When you're talking about sports, the off-season is the period athletes spend training in preparation for their playing seasons.