Watermelons are abundant during the summer season. The large fruits are harvested at the peak of ripeness. After you harvest or purchase a fresh watermelon, it has a limited storage life. Storing the watermelon past its storage life can cause it to spoil. Knowing the signs of spoilage will help you to determine if the watermelon is safe to consume. Consuming a spoiled watermelon puts you at risk for a serious food-borne illness.
Examine the watermelon carefully. Look for areas of mold or dark brown or black spots. The spots indicate that the watermelon has rotted and it needs to be discarded.
Look at the cut watermelon slices. Inspect them closely for signs of slime and discoloration. Throw away the watermelon if you notice any of these signs because they indicate spoilage.
Smell the watermelon. If you notice a sour or foul odor, discard the watermelon to prevent the risk of a food-borne illness.