How long do Roasted nuts last in the fridge once opened?
Turning the range into a date
Roasted nuts keep 4 weeks in the fridge once opened. Two clocks run on this item: one from the day it went into storage and one from the day the seal broke. Both are listed below, 2 rows in all.
- Once opened · in the pantryUse by1 week to 2 weeks after the day you opened it
- Once opened · in the fridgeUse by4 weeks after the day you opened it
The methods the USDA actually rates for this item
The USDA rates only 2 of its nine storage methods for this item, and the pantry after opening and refrigerator after opening are what it rates. The other 7 slots are blank, and a blank is not a zero: it means no published figure, not that the method fails. On the same shelf it sits 69 of 70, between Pectin at 1 month and Polenta at 7 days.
Every storage figure the USDA publishes for this item
The USDA gives this item a pantry and a refrigerator figure and no freezer figure at all, the pattern behind 79 of the 466 foods in the data.
- Unopened · in the pantryPackage use-by date
- Once opened · in the pantry1 week to 2 weeks
- Once opened · in the fridge4 weeks
Where the USDA answers in words instead of days
1 of the nine slots the USDA keeps for this item holds an answer that is not a number, and an answer in words is still an answer: in the pantry it answers with the package date rather than a number, and the use-by date printed on that particular package is the figure to go by.
Can you freeze roasted nuts?
The USDA prints no freezer time for roasted nuts. Frozen at 0 °F any food stays safe; whether they are still good after thawing is a matter of quality. Keep the fridge at 40 °F or below and the freezer at 0 °F.
How to tell if roasted nuts have gone bad
Go by the date first: roasted nuts keep 4 weeks in the fridge once opened. A sour or off smell, mold, slime or an odd color mean it goes out. The bacteria that make people sick change none of these, so past its window it goes out even if it seems fine. Never taste to test.
Sources: USDA FSIS: the danger zone USDA FSIS: freezing and food safety USDA FSIS: molds on food FDA: are you storing food safely FoodSafety.gov: the FoodKeeper app.
Is it still safe to eat, or just past its best?
The answer at the top of this page reads 4 weeks in the fridge once opened. What decides that is the food and not the shelf the source files it on: Roasted nuts (peanuts, cashews, almonds) is acid, dry, sweet, alcoholic or pure fat. Past it, whether it has gone bad is yours to judge by look and smell: this window rates quality, not the day it turns hazardous.
It is past the date. Now what?
Say the calculator above puts Roasted nuts (peanuts, cashews, almonds) past its 4 weeks in the fridge once opened window. Past that the calendar stops deciding and the food itself does. A rancid, paint-like smell in a nut, an oil or a seed, mold around the neck of a bottle, or a swollen can mean it goes out whatever the date says.
The whole rule, including the cases the source does not cover, is set out under what to do when the date has passed.
Two places, and one of them is the wrong one
The USDA rates two places for Roasted nuts (peanuts, cashews, almonds) in one state and they disagree: 4 weeks in the fridge once opened against 1 week to 2 weeks in the pantry once opened. This page answers with the refrigerator, the longer of the two. Both figures are the USDA's own, so this is a choice of where to put the food rather than a disagreement about how long it keeps.
Items that behave the same way
The 6 items below are the closest match to this item by storage behavior, running 7 days to 5 months and bracketing its 4 weeks.
- Pectinkeeps 1 month in the pantry once opened
- Polentakeeps 5–7 days in the fridge once openedshelf-stable
- Potato chipskeeps 1–2 weeks in the pantry once openedup to 2 months sealed in the pantry
- Cashew butterkeeps 3 months in the pantry
- Pine nutskeeps 3 months in the fridge
- Marshmallow crèmekeeps 1 month in the pantry once openedup to 5 months sealed in the pantry
Where these numbers come from
Every storage time on this page is the USDA’s own published figure from the FoodKeeper data, one of the 9 it keeps per food, reproduced unchanged and never an estimate of ours. Where the USDA lists several kinds under one name, each kind keeps its own windows, and the page names the kind its answer is for. The dates and multipliers are ours, computed from those ranges.
Source: USDA FoodKeeper, retrieved 1 September 2026. Found a figure that does not match the source? Tell us on the contact page. How the site is built is on the method page.
USDA index terms: almonds, cashews, nuts, peanuts, roasted, roasted almonds, roasted cashews, roasted nuts, roasted peanuts
KeepsUntil is an independent reference built on public USDA data. It is not affiliated with, endorsed by, or connected to the U.S. Department of Agriculture or the Food and Drug Administration. Whether a given window is a safety limit or a quality window is stated on the page that prints it.