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How long does canned tuna (opened) last?
Updated 2026-05-13 · USDA FoodKeeper & FDA guidelines
Refrigerator
3 days
After opening, transfer to glass/plastic
The short answer
Canned Tuna (opened) lasts as long as you store it correctly — which can mean anywhere from a few days on the counter to a year in the freezer. The numbers above represent best quality per USDA and FDA guidelines, not absolute safety limits.
Why these numbers vary
Opened canned tuna. Storage life depends on temperature consistency, humidity, packaging, and how fresh it was when you got it. Refrigerators that swing between 38°F and 45°F shave days off these numbers; vacuum-sealing or freezing extends them.
How to tell if canned tuna (opened) is bad
- Off smell
- Discoloration
- Bulging can (NEVER eat)
Storage tips
- Don't store in opened can
- Bulging cans = botulism risk, throw away unopened
- Unopened canned tuna: 3-5 years
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Frequently asked questions
How long does canned tuna (opened) last in the refrigerator?
Canned Tuna (opened) lasts 3 days in the refrigerator. After opening, transfer to glass/plastic
How can you tell if canned tuna (opened) is bad?
Watch for: Off smell; Discoloration; Bulging can (NEVER eat).