Other Signs Your Watermelon Has Gone Bad
Foam is one of the most obvious warning signs, but it isn’t the only one. Watch for:
- Sour or unpleasant smell: Fresh watermelon should have a mild, sweet aroma, not a sharp, sour, or fermented smell.
- Slimy or mushy texture: Flesh that feels slippery, excessively soft, or breaks down easily may be spoiled.
- Fizzy or tingling sensation: A carbonated or unusual sensation can indicate fermentation. If the watermelon tastes unusual, spit it out rather than continuing to eat it.
- Dark or sunken spots: Significant discoloration, soft spots, or depressions can indicate decay.
- Cracks or damage to the rind: Damaged areas can provide opportunities for microorganisms to enter and accelerate spoilage.
If you notice obvious signs of spoilage, it’s safest to discard the watermelon rather than risk eating it.
How Heat Can Make Spoilage Worse
Warm temperatures can speed up the growth of microorganisms and the deterioration of fresh produce. A watermelon left in hot conditions may spoil more quickly, sometimes before obvious external signs appear.
To help keep watermelon fresh:
- Store whole watermelon in a cool, clean place and refrigerate it when appropriate.
- Refrigerate cut watermelon promptly.
- Keep cut watermelon covered and refrigerated.
- Use refrigerated cut watermelon within a few days, following food-safety guidance.
- Discard watermelon that develops an unusual smell, texture, appearance, or signs of fermentation.
When in doubt, don’t taste-test questionable fruit. If a watermelon is foaming, bubbling, leaking unusual liquid, or otherwise appears spoiled, the safest choice is to throw it away.
