How to Pick a Ripe Watermelon It should feel HEAVY for its size. It should have a creamy YELLOW (not white) spot on one side where it was sitting on the ground. If you thump it with you finger, as if you were flicking a crumb off your shirt, it should sound HOLLOW. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X