As a melon with low sugar content, watermelon is great for diabetics. Watermelon has a high fiber and water content and a low sugar content that is filling and doesn't impact blood sugar levels, as Diet Health Club explains.
Watermelon and other melons are rich in nutrients and vitamins that are beneficial to a diabetic's diet. Portion size still matters when it comes to eating fruits and melons, since some fruits are higher in natural sugar content while others are low. Cantaloupe, pomegranates, watermelons, kiwis and pears are some of the best fruits for diabetics. These fruits have a reasonably low glycemic index meaning they don't rapidly raise blood sugar levels.