Condensation Happens – What can you do about it?
As we get closer to the winter months and temperatures start to drop, the chances you’ll have to deal with some condensation build-up inside your tent become almost certain.
Understanding Condensation
Not all of us are able to camp in the high and dry desert. But even there, condensation can still rear its watery head.
So how does it form? Condensation occurs when moist air cools down to its dew point, causing water vapor to turn into liquid. The exact dew point depends on your location, humidity, and sleeping temperatures. Under the right conditions—warm air, high humidity, and little airflow—it can even happen in the middle of the day.
Why it happens (hint: It’s You)
While weather and humidity play a role, the biggest source of moisture in your tent is you.
An average adult exhales about 25ml of water vapor per hour while sleeping. Over an eight-hour night, that’s roughly 200ml per person—and that moisture has to go somewhere. In a closed tent, it settles on the cooler tent fabric, condensing into droplets.
How to Reduce Condensation
1. Maximize Ventilation
The easiest and most effective solution is cross-ventilation. Open windows or vents on opposite sides of the tent so air can flow through freely. The more air movement you have, the less moisture will linger and condense.
2. Use a Small Fan
If natural airflow is limited, a small 4” fan can make a big difference. Fit it into one of your tent’s HVAC ports and set it to blow air out of the tent—this will draw fresh air in through the opposite vent and keep air circulating.
3. Add an Insulation Insert
For colder weather, an insulation liner not only keeps you warmer but also helps manage moisture. The quilted material absorbs ambient humidity and prevents it from forming visible droplets on the tent walls. Plus, it helps quiet the interior.
4. Wipe It Down
Even with your best efforts, a bit of condensation can still happen. Keep a chamois or absorbent towel handy to quickly wipe down the walls in the morning. This prevents dripping, speeds up drying time, and keeps your tent fresher for the next night.
In Summary
What’s the most common cause of condensation? You are.
What can be done to combat it? Cross-ventilation in the tent, whether from natural air movement or fan assisted.
Still getting moisture? Bring a chamois or other absorbent rag into the tent so you can give the tent walls a quick wipe down.
