Cooked snow crab legs hold for about 3 to 5 days in the refrigerator, stored at 40°F or below in an airtight container or wrapped tightly enough to keep air out. Since most snow crab sold at grocery stores and restaurants is already cooked before it reaches you, this is the window that applies to the vast majority of snow crab people actually bring home.
The clock starts from when the crab was originally cooked, not from when it landed in your specific refrigerator, which matters if you're buying pre-cooked crab that's already been sitting for a day or two before purchase.
Why snow crab is almost always sold already cooked
Snow crab meat doesn't hold up well raw for long, so it's standard practice in the industry to cook it shortly after harvest, then either chill it for fresh sale or freeze it for later distribution. This is different from something like raw shrimp or a raw fish fillet, which are commonly sold and cooked at home from a raw state.
Because of this, checking the packaging for a "cooked" or "ready to eat" label is useful, but the safer default assumption for snow crab specifically is that it's already cooked unless clearly stated otherwise. This affects how you handle it: reheating cooked crab to a warm serving temperature is different from cooking raw crab through for the first time, and treating already-cooked crab as if it still needs a full cook can dry it out unnecessarily.
The fresh-cooked window versus the thawed window
Freshly cooked snow crab, whether cooked at home or bought pre-cooked and fresh (not frozen), holds for 3 to 5 days under proper refrigeration. Frozen snow crab that's been thawed behaves a little differently: once thawed in the refrigerator, it should be used within 24 to 48 hours, a shorter window than the fresh-cooked one.
This shorter thawed window exists because the freezing and thawing process itself puts additional stress on the meat's texture and structure, which shortens how long it holds up safely and how good it stays even within that safe window. Treating thawed crab with the same 3 to 5 day assumption as never-frozen crab is a common mistake that can mean eating crab past its actual safe point.
Refreezing: generally not a good idea
Refreezing snow crab legs after they've been thawed isn't recommended, especially if the thaw happened somewhere other than the refrigerator, such as on the counter or under running water, both of which raise the temperature into a range where bacteria multiply faster. Even a proper refrigerator thaw followed by a second freeze results in noticeable quality loss, since the ice crystal damage from freezing compounds each time it happens.
If you've thawed more crab than you'll use in the 24 to 48 hour window, cooking or reheating what you need and then freezing the cooked leftovers is a more reliable approach than refreezing the raw thawed crab and hoping for the best.
Storing snow crab legs correctly
An airtight container, or a tight wrap of plastic or foil if the original packaging isn't resealable, keeps snow crab from drying out and picking up other flavors from the refrigerator. Storing it in the coldest part of the fridge, generally toward the back rather than in the door, keeps its temperature more consistent through the day.
Labeling the container with the date it was cooked, not just the date you bought it, removes the guesswork later, especially for crab that may have already been sitting a day or two before it reached your kitchen.
Reheating leftover crab within the safe window
Since most snow crab is already cooked, reheating leftovers within the safe window is about bringing them back to a warm serving temperature without drying out meat that doesn't need any further cooking. Steaming leftover crab legs gently for a few minutes tends to work better than a microwave, which can toughen crab meat quickly if left in too long.
A quick dip in simmering water for a minute or two is another gentle option, particularly for legs that have dried out slightly in the fridge, since the brief exposure to moisture helps restore some of the texture lost during storage.
How this compares to king crab and other crab legs
The same general storage guidance, 3 to 5 days for freshly cooked, 24 to 48 hours once thawed from frozen, applies broadly to other pre-cooked crab varieties like king crab, since the underlying reasoning, most commercial crab is cooked shortly after harvest and sold either fresh-chilled or frozen, holds across species rather than being specific to snow crab. Some minor variation in exact shelf life can exist between crab types due to differences in size, shell thickness, and moisture content, but the core guidance and the same warning signs of spoilage apply across the board.
What actually indicates snow crab has gone bad
A strong ammonia-like or sour smell, a slimy texture, or a dull, grayish appearance rather than the crab's normal color are the clearest signs it's no longer good. As with other cooked shellfish, it's worth remembering that some spoilage bacteria don't reliably produce a detectable smell before reaching unsafe levels, which is why the stated day count is worth following even when the crab still looks and smells acceptable.
If you're planning to reheat leftovers from the Snow Crab Legs Tuesday deal or a Crab Your Way order, getting them into the refrigerator promptly and eating them within the 3 to 5 day window is the same guidance that applies to snow crab bought anywhere else. For confirming crab is properly cooked in the first place, whether reheating or cooking from scratch, our guide to crab leg doneness covers the visual and texture signs to check.
Buying snow crab legs at a seafood counter versus pre-packaged
Snow crab bought fresh from a seafood counter, rather than in sealed, pre-packaged form, often comes with less certainty about exactly how long it's already been sitting since it was originally cooked, since a counter display doesn't always carry the same clear date labeling a sealed package does. Asking the counter staff directly how recently a specific batch was cooked, rather than assuming freshness based on how the display looks, is a reasonable question that a well-run seafood counter should be able to answer confidently, similar to the same kind of direct sourcing question worth asking about other seafood covered elsewhere on this site.
Pre-packaged snow crab, by contrast, generally carries a clear cooked or packed date, making it easier to calculate exactly where you are in the 3 to 5 day window from a known starting point rather than an estimate based on how a counter display appears on a given day.
Why leg size doesn't meaningfully change the storage window
Larger snow crab legs, sometimes called "colossal" or "jumbo" depending on the specific size grading, don't carry a meaningfully different storage window than smaller legs, since the core factors driving spoilage, whether the meat was cooked properly and has been kept consistently cold, apply the same way regardless of individual leg size. Larger legs may take a bit longer to reheat evenly given their greater mass, similar to the same principle covered for reheating a larger, thicker cut of any protein, but this affects reheating time rather than the underlying safe storage window itself.
This is a useful thing to know specifically because larger, more expensive crab legs can create an impression that they deserve more careful, extended storage consideration than a smaller, less expensive size, when in practice the same 3 to 5 day guidance applies evenly across sizes, assuming both were handled and stored the same way from the start.
The short version: 3 to 5 days for freshly cooked snow crab, 24 to 48 hours once thawed from frozen. Keep it cold, sealed, and dated, and don't rely on smell alone to decide when it's time to let it go.