We open a jar at breakfast, leave it near the kettle for a few minutes, then close it again. That is harmless when it is occasional, yet honey naturally interacts with the surrounding air and can draw moisture from it. Here we explain this property—hygroscopicity—and the simple habits that help preserve honey’s texture and keeping quality.
Honey is hygroscopic: what does that mean?
A hygroscopic food attracts and holds some of the water present in the air. Honey behaves this way because it is highly concentrated in sugars, several of which have a strong affinity for water.
Water does not appear spontaneously inside the jar. It comes from ambient humidity and can be absorbed through the exposed surface. That is why a properly fitted lid matters, even in a clean cupboard.
When does honey take up the most moisture?
Four factors matter most: the room’s humidity, how long the honey is exposed, the size of the opening, and the surface area in contact with air. A wide-open jar left for a long time in a steamy kitchen is very different from one opened for a few seconds in a dry room.
Kitchen steam makes a difference
Air near a saucepan, kettle, open dishwasher or misted window contains more water vapour. We recommend replacing the lid before steaming food or leaving a hot, moist dish to cool nearby.
A brief opening is no cause for alarm
There is no need to rush every spoonful. Open the jar, serve with a clean, dry utensil and close it again. Repeated or prolonged exposure to humid air is what is most worth avoiding.
How can moisture affect honey?
If honey absorbs enough water, the top layer may become runnier and its overall water content may rise. Excess moisture can also make storage less stable. A slightly softer honey is not automatically spoiled: texture naturally varies with floral source, temperature and crystallisation.
Look at several signs together. A distinctly sour or alcoholic smell, persistent foam, unusual bubbles or pressure on opening can indicate fermentation. Simple textural separation or crystallisation alone does not.
Four practical ways to limit moisture absorption
1. Close the jar promptly
After serving, wipe the thread if needed and tighten the lid. A lid merely resting on top does not protect the honey from room air as effectively.
2. Use a completely dry spoon
A wet spoon introduces water directly into the jar. Keep crumbs and other food residues out too; take what you need with a clean utensil.
3. Store it somewhere dry and temperate
A cupboard away from steam, direct sunlight and large temperature swings is generally suitable. The edge of the sink, the top of the dishwasher or a shelf directly above the hob are poorer choices.
4. Keep the original container tightly closed
If you decant honey, use a clean, fully dry food-safe container with a tight seal. Keep the useful label information as well, so the product remains traceable.
Hygroscopicity is not always a drawback
The same ability to retain moisture helps explain why honey is useful in baking. In a recipe, it can help a crumb or cake stay pleasantly soft. In the jar we limit outside moisture; in a prepared food, the same property can support texture.
Frequently asked questions
Should I discard a jar left open for an hour?
Not automatically. Consider how humid the room was, then check appearance and smell. Close the jar and watch for change. If you notice foam, a fermented smell or genuine doubt, do not eat it.
Does refrigeration protect honey from moisture?
Cold storage is generally unnecessary for properly sealed honey and may encourage or intensify crystallisation, depending on the honey and temperature. A tight jar in a dry, temperate place is what matters most.
Has crystallised honey absorbed water?
No. Crystallisation is a natural process mainly linked to sugar composition and temperature. It does not prove water ingress or spoilage.
The simple takeaway
Honey naturally attracts moisture from the air, but the solution is straightforward: close the lid tightly, use a dry spoon and keep the jar away from steam. These habits preserve its texture without making everyday use complicated.
To explore the textures and flavour profiles of our different varieties, visit our raw honey collection.
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