How Can You Tell If a Watermelon Is Bad?

Tim Sackton/CC-BY-SA 2.0

Check if your watermelon is still fresh for eating by inspecting, slicing and smelling the watermelon. Watermelons have a shelf life of seven to 10 days, or two to three weeks in the refrigerator. After the melon has been cut, however, it beings to go bad quickly.