An Australian Perspective on Humidifiers for ukuleles.
Does your ukulele even need a humidifier at all? Just because "I read that's what they do in the USA' is not a good reason. In Australia we have such varied climates, Darwin is totally different to Hobart and Sydney is different to Perth. Also do you live on the coast, do you live inland? Does it ever snow for months at a time in your town. Do you have Airconditioning? and is that Evaporative or refrigerated? Lots of things to consider other than I read that's what they do overseas.
Black Humidifier $19.95 Including Postage
Silver Humidifier $19.95 Including Postage
What is a humidifier?
A case humidifier is a device that releases moisture into the instrument case, and your wooden instrument absorbs this moisture.Wood is hygroscopic, meaning it naturally absorbs and releases moisture. When the air becomes too dry, wooden instruments (like acoustic guitars, violins, cellos, and clarinets) shrink. This shrinkage can cause the wood to warp, crack, or pull apart at the glued joints.
What can happen storing an instrument in too dry or too wet conditions.
Dry conditions can cause wooden ukuleles to shrink and, in some cases, crack.
Too much moisture can cause swelling and changes in playability.
The aim is a stable environment suited to your instrument, not simply adding as much moisture as possible.
What humidity range should a ukulele be kept in?
Relative humidity (RH) describes how much moisture the air holds relative to what it could hold at that temperature. Instrument-care recommendations vary: Kala gives 40–55% RH in its humidifier guidance and 45–55% in its travel advice, while Ukulele Magazine describes a broader 40–60% range for solid-wood ukuleles.
For many wooden ukuleles, around 45–55% RH is a sensible starting target, but follow your maker's instructions for your particular model first. These numbers are care guidelines, not a guarantee against damage or an exact boundary where cracking begins. Duration, changes in conditions and the instrument's construction matter too.
Solid-wood instruments deserve particular attention. Laminated instruments are generally less vulnerable, but they are not immune to humidity-related problems. If you are unsure what your ukulele is made from, ask us before choosing a care routine.
Regardless of whether you have a solid wood or laminate uke the Glues used in manufacture are generally able to be softened and steamed off so Luthiers and reset a neck or replace a damaged bridge etc.
Imagine the effects of a wooden instrument in a tropical area during the pre wet season "build-up". Lots of constant heat and high humidity has seen many a ukulele or acoustic guitar have its bridge come off or neck joint move.
Check the Relative Humidity of your town on the Net is the place to start.
The Bureau of Meteorology will likely have the relative humidity's for your town over the 4 seasons. That's a good place to start working out is a case humidifier is needed. If your towns relative humidity sits around 45–55% over all 4 seasons you are off to a good start.
Now we have to ask the question about conditions within the room we store our ukulele. Do you have Evaporative Aircon that raises RH or do you have refrigerated Aircon that lowers RH.
Measure first: where to put your hygrometer
A hygrometer measures relative humidity. A weather app reports outdoor conditions, not necessarily the air surrounding your ukulele.
- Use a digital hygrometer in the place where your instrument spends most of its time. If you store it in a case, measure inside that case; a separate room reading can help explain changes.
- Position it securely in the case's main interior space, where it will not scratch the instrument or interfere with the lid. Do not put it directly against a damp humidifier or inside an isolated accessories pocket and assume that reading represents the whole case.
- Let the sensor settle according to its instructions. Check readings regularly, especially after changing rooms, turning heating or cooling on, or travelling.
- Look for a pattern rather than reacting to every brief fluctuation. Follow the hygrometer maker's accuracy and checking instructions if a reading seems unlikely.
When is a humidifier needed?
If readings repeatedly sit below the 45–55% RH recommended range, humidity control is worth addressing before symptoms appear. An in-case humidifier designed for wooden instruments can help in dry conditions. A case alone does not actively replace lost moisture.
Use the humidifier exactly as directed, including its filling, positioning and maintenance instructions. Keep free water away from the wood and finish, and never put a dripping sponge or loose wet cloth inside the instrument. Continue checking the hygrometer so you do not over-humidify.
If readings are already within the recommended range, do not add moisture.
If they are consistently too high, a moisture-adding humidifier is not the answer!
Ask about appropriate humidity control or room dehumidification for your conditions, and keep measuring.
Australian winter versus summer care
Winter: Indoor heating can create dry conditions around an instrument, even when the weather outside feels damp. Check the room and case rather than assuming rain means the ukulele has enough moisture.
Summer: Air conditioning can lower indoor humidity, while humid weather can create the opposite challenge. An Australian summer does not automatically mean your instrument needs either humidifying or drying.
Year-round: Keep your ukulele away from direct sun, heaters and heating or cooling vents. Choose a stable storage spot and put it back in its case when you are not playing. Avoid chasing a perfect number with repeated, abrupt changes.
Travelling with your ukulele
Keep the instrument protected in its case, out of direct sun and away from hot parked cars. Children, Dogs and Instruments DO NOT BELONG in Hot cars
Symptoms to watch for.
Possible signs of excessive dryness include newly sharp fret ends, a sunken-looking top, lower string action, new buzzing, opening seams or cracks.
Excess moisture can cause swelling, unusually high action or a change in sound and playability.
These symptoms are warning signs, not a diagnosis. Buzzing, tuning changes and action problems can have other causes. Record the humidity readings, when the change appeared and any recent travel or heating changes; clear photographs can help a specialist assess the next step.
When to contact a repair specialist
Seek advice promptly if you notice a crack, an opening seam, a lifting bridge, a loose part, a marked change in the instrument's shape or a sudden substantial change in playability. Stop playing if you suspect structural damage, keep the instrument protected in a stable environment and ask a qualified ukulele repairer or luthier how to handle it, including whether string tension should be changed.
Re-humidifying is not a guaranteed repair: some effects of dryness may improve, but cracks and joint problems can need professional work. If the instrument may be under warranty, contact the seller or maker before authorising repairs.
A simple humidity-care routine
- Measure where the ukulele is actually stored.
- Respond to a consistent pattern with suitable humidity control, not guesswork.
- Check more often when seasons, rooms or travel change the conditions.
- Get specialist advice early if the instrument develops structural or persistent playability changes.
Need advice for your ukulele?
Contact Ukulele Trading Co Australia for personalised care advice. Tell us your ukulele's brand and model, your location, whether it is stored in a case, and your recent room and case humidity readings. If something looks wrong, include photos and describe what has changed. We can help you work out an appropriate next step and when to consult a repair specialist.
This is general preventative-care guidance, not a diagnosis or a substitute for your instrument maker's instructions or an assessment by a qualified repairer.
