Only situations with a published figure are listed. A blank isn't “forever” — it means no reliable number is published for it.
Storage
Store at: Cool, dry pantry unopened; refrigerate at 40°F (4°C) or below after opening
Refrigerate after opening: Yes — refrigerate at 40°F (4°C) or below
Published storage guidance for Coconut water, from Harmless Harvest (manufacturer) and Vita Coco (manufacturer):
Refrigerate once opened and drink within a few days“consume Harmless Harvest Coconut Water and Coconut Smoothie products within 4-5 days of opening as long as the product has been refrigerated” — Harmless Harvest (manufacturer)
Shelf-stable cartons keep about 12 months unopened“Tetra Pak allows our coconut water to be shelf stable for up to 12 months outside of the fridge.” — Vita Coco (manufacturer)
Once opened, refrigerate and drink it within 24–72 hours — the shorter, safety-first window“place it in a refrigerator and consume within 24-72 hours (about 3 days) — nobody likes sour coconuts.” — Vita Coco (manufacturer)
Sources differ: Two manufacturers publish different after-opening windows, and the difference is the process, not the brand: Vita Coco (heat-treated, Tetra Pak) says 24–72 hours refrigerated; Harmless Harvest (raw, never heat-pasteurised) says 4–5 days. We publish the shorter one. Check your own carton — both manufacturers' own wording is quoted above.
How to tell if Coconut water has gone bad
Specific to Coconut water, published by Harmless Harvest (manufacturer):
Fizz or carbonation in what should be a still drink“Some signs of spoilage are carbonation, a strong smell, thickened consistency, or altered taste.” — Harmless Harvest (manufacturer)
Turning pink is NOT spoilage — that one is natural“the color can vary between batches due to naturally varying levels of antioxidants which can fluctuate based on the harvest and season...Clear or pink, it's still our tasty, organic coconut water!” — Harmless Harvest (manufacturer)
And the general signs for beverages:
Sour or off smell
Cloudiness, sediment, or curdling
Fizzing in a still drink, or a swollen carton or can
A bitter or 'off' first sip
The first list is quoted from Harmless Harvest (manufacturer), with the page each line came from linked beside it; the rest are the general signs for beverages. Never taste something to test it — when in doubt, throw it out.
Air and warmth are what shorten an opened item's life — the right container buys back the days the packaging gives up once the seal's broken.
About 1–2 days refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper v128. Refrigerate it once it's open.
Does Coconut water need to be refrigerated after opening?
Yes — keep Coconut water 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 Coconut water is bad?
Fizz or carbonation in what should be a still drink; A strong smell, or it has gone thick and syrupy; Turning pink is NOT spoilage — that one is natural. That guidance is published for Coconut water by Harmless Harvest (manufacturer). Beyond that, the general signs for beverages are: Sour or off smell; Cloudiness, sediment, or curdling; Fizzing in a still drink, or a swollen carton or can; A bitter or 'off' first sip. Never taste something to test it — when in doubt, throw it out.