How to Tell if a Watermelon Is Good: Look, Lift, Turn
How to tell if a watermelon is good (ripe) at the store: ground spot, weight, dull rind, and what to make of thumping. Sources from extension services and the Watermelon Board.
A good watermelon feels heavy for its size, has a creamy yellow ground spot on one side, and a dull rather than shiny rind. Those signs beat thumping, which Illinois Extension calls unreliable. A white or pale spot means the melon was picked too early.
This page is about picking a ripe watermelon, which is how to tell if a watermelon is good before you buy it. If you already have one at home and wonder whether it has spoiled, read how to tell if a watermelon is bad instead.
How to tell if a watermelon is good: Look, Lift, Turn
The Watermelon Board boils it down to three steps: look for a firm melon free from bruises, cuts or dents; lift it, since at 92% water it should be heavy for its size; and turn it over to find the creamy yellow ground spot where it sat and ripened in the sun.
| Check | Good sign | Warning sign |
|---|---|---|
| Ground spot | Large, creamy, almost buttery yellow | Small, white or pale green |
| Weight | Heavy for its size | Light for its size |
| Rind | Dull, firm, no cuts or dents | Shiny, bruised or cracked |
| Sound (optional) | Deep when you tap | Not reliable either way |
The ground spot and rind advice comes from Texas A&M AgriLife Extension: the bigger and creamier the yellow patch, the longer the melon ripened on the vine, and a shiny melon is underripe inside.
Why does the ground spot matter most?
It records how long the melon stayed on the vine. UC Davis says the ground spot changes from pale white to creamy yellow at proper harvest maturity. Ohio State University Extension agrees that a yellow-white color indicates ripeness while white or pale green suggests it wasn't mature.
Does thumping a watermelon tell you it's ripe?
Experts disagree, so don't lean on it. Texas A&M says a ripe melon has a deeper sound, and University of Georgia Extension's fact sheet says a hollow sound indicates ripeness. Illinois Extension says listening for a hollow sound is not reliable, because newer varieties tend to be firmer and crisper. Michigan State University Extension goes further and says tapping doesn't indicate ripeness. Use the ground spot and the weight first.
Will a watermelon ripen on the counter?
No. UC Davis says watermelons typically don't develop internal color or gain sugar after being removed from the vine, and the University of Maryland classes them as non-climacteric, meaning they won't ripen any further once harvested. What you pick is what you eat, so choose with care at the store.
What if you're picking one at a farm stand or from a garden?
You get more clues. University of Georgia Extension's watermelon fact sheet says a brown, dried tendril near the melon indicates it's mature, and that a striped melon should have green bands that break up at the blossom end. Illinois Extension adds that the ground side turns from white to yellow.
What should you look for in a cut watermelon?
Ohio State suggests judging by the inside: the more red flesh and less white rind, the riper. Small white "seeds" in a seedless melon are just empty seed coats, according to the Watermelon Board.
Keep track of what you bring home
Once you've picked a good one, use it before it turns. Add what you buy to Well Stockd and fresh fridge and pantry food gets an estimated expiration date based on typical shelf life, so the food closest to going off sorts to the top. Try it free. If you're comparing options, see our guide to apps that track expiration dates. The shelf-life guide covers other fresh foods.
Related guides
- How to tell if a watermelon is bad
- How to tell if a cantaloupe is ripe
- How to tell if honeydew is ripe
- Can you freeze watermelon?
FAQ
Is a bigger yellow spot on a watermelon better?
Generally yes. Texas A&M says the bigger the yellow belly and the creamier the color, the more time the melon ripened on the vine. A small spot that looks more white than yellow suggests it may not be ripe.
Are seeded watermelons sweeter than seedless ones?
Not reliably. The Watermelon Board says there's no guarantee seeded watermelons are sweeter, and sweetness varies with growing conditions and harvest timing.
Should a ripe watermelon feel heavy or light?
Heavy. A watermelon is about 92% water, so a heavier melon likely holds more water and will be juicier.