How long does Tuna (packet) last after opening?

Updated 2026-08-07 · Free · No sign-up

Once opened, Tuna (packet) keeps about 3–4 days in the fridge. Unopened, it keeps about 18 months.

Source: USDA FoodKeeper v128 · Category: Pantry staples

How long Tuna (packet) keeps

SituationKeeps for
Unopened · pantry18 months
Opened · fridge3–4 days

Only situations with a published figure are listed. A blank isn't “forever” — it means no reliable number is published for it.

Storage

How to tell if Tuna (packet) has gone bad

These are the general spoilage signs for pantry staples — never taste something to test it. When in doubt, throw it out.

↥ Check another product →

FAQ

How long does Tuna (packet) last after opening?

About 3–4 days refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper v128. Refrigerate it once it's open.

Does Tuna (packet) need to be refrigerated after opening?

Yes — keep Tuna (packet) at 40°F (4°C) or below once it's open. Cool, dry pantry unopened; refrigerate at 40°F (4°C) or below after opening.

How can you tell if Tuna (packet) is bad?

Look for: A rancid, paint-like, or musty smell; Bulging, leaking, deeply dented, or rusted cans; Insects or webbing in dry goods; Mould or discoloration. Never taste something to test it — when in doubt, throw it out.

Related

Walnuts (shell or no shell)Pantry staplesBreadcrumbs (commercial)Pantry staplesChocolate hazlenut spreadPantry staplesFlaxseed (ground)Pantry staplesInstant breakfast drinks (bottled)Pantry staplesNuts (jars or cans)Pantry staplesPistachios (shell or no shell)Pantry staplesPumpkin seeds (roasted, in-shell)Pantry staples