How Long Does It Keep?
Shelf Stable Foods

Tunapacket

3–4 days in the fridge after opening and 18 months in the pantry from the date of purchase.

Pantry

from purchase
18 months

Fridge

after opening
3–4 days

Freezer

No USDA guidance

Source: USDA FSIS FoodKeeperHow to read these times

Common questions

How long does tuna (packet) last in the fridge?

3–4 days after opening.

How long does tuna (packet) last in the pantry?

18 months from the date of purchase.

How can I tell if tuna (packet) has gone bad?

Throw it out if it smells off, feels slimy or sticky, shows mold, or has changed color. Storage times assume it was handled safely and kept cold the whole time.