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You can dehydrate watermelon in a dehydrator by slicing it thinly, removing the rind and seeds, and drying it at around 135°F (57°C) for 8 to 12 hours.
The result is a sweet, chewy, candy-like snack that lasts for months when stored properly.
Watermelon is over 90% water, so dehydrating it takes patience, but the payoff is absolutely worth it.
In this post, we’ll walk through exactly how to dehydrate watermelon in a dehydrator, from picking the right melon to storing your finished snacks.
Let’s dive in.
How to Dehydrate Watermelon in a Dehydrator
Learning how to dehydrate watermelon in a dehydrator is simpler than you might think.
The process basically comes down to three things: choosing good fruit, cutting it correctly, and drying it long enough.
Here’s how to nail each step so your watermelon dehydrates perfectly every time.
1. Pick a Ripe but Firm Watermelon
The best watermelon for dehydrating is ripe, sweet, and firm.
Overripe melons are mushy and hold too much water, which means they’ll take forever to dry and may even spoil before they finish.
Look for a melon that feels heavy for its size and has a deep, hollow sound when you tap it.
A ripe watermelon will also have a creamy yellow field spot on the bottom where it rested on the ground.
2. Wash, Peel, and Remove the Seeds
Start by washing the outside of your watermelon under cool running water.
Then cut it into quarters and slice away the rind with a sharp knife.
Remove any seeds as you go, especially if you’re working with a seeded variety.
Seedless watermelons make this step effortless, which is why many people prefer them for dehydrating.
3. Slice the Watermelon Evenly
Consistent slices are the secret to dehydrating watermelon evenly.
Aim for slices that are about 1/8 to 1/4 inch thick.
If your slices are too thick, the outside will dry while the inside stays wet, which invites mold.
Too thin, and they’ll crumble into brittle shards instead of chewy chips.
A mandoline slicer makes quick work of this, but a steady hand and a sharp knife work just fine too.
4. Arrange the Slices on Dehydrator Trays
Lay your watermelon slices in a single layer on the dehydrator trays.
Leave a little space between each slice so air can circulate freely around them.
If you’re using a dehydrator with mesh sheets, those are ideal because they keep small pieces from falling through.
Overcrowding the trays is one of the most common mistakes when you dehydrate watermelon, so resist the urge to pile them up.
5. Dry at the Right Temperature
Set your dehydrator to 135°F (57°C).
At this temperature, watermelon slices typically take 8 to 12 hours to fully dehydrate.
The exact time depends on how thick your slices are, how juicy the melon is, and the humidity in your kitchen.
Check on them every couple of hours after the 8-hour mark.
How to Tell When Dehydrated Watermelon Is Done
Knowing when to stop dehydrating watermelon is just as important as the drying itself.
Here’s what to look for before you pull the trays out.
1. The Texture Should Be Leathery, Not Brittle
Finished dehydrated watermelon should feel leathery and pliable, kind of like a fruit roll-up.
It should bend without snapping and shouldn’t leave any sticky moisture on your fingers.
If it still feels damp or tacky, it needs more time in the dehydrator.
2. The Color Will Deepen Significantly
As watermelon dehydrates, the bright pink flesh turns a deep, dark red.
The edges may curl slightly and take on a slightly translucent look.
This color shift is a good visual cue that your watermelon is nearly finished drying.
3. No Moisture Should Remain Inside
Tear one slice open and check the center.
If you see any shiny moisture inside, put the trays back in and keep dehydrating.
Any lingering moisture is what causes dehydrated watermelon to go bad during storage, so don’t rush this step.
Tips for the Best Dehydrated Watermelon
A few small tweaks can take your dehydrated watermelon from good to unforgettable.
Here’s what to keep in mind.
1. Sweeter Melons Make Sweeter Snacks
Since dehydrating concentrates flavor, starting with a sweet, ripe watermelon gives you a naturally candy-like result.
A bland melon will only get blander once the water is gone.
2. Try a Light Sprinkle of Seasoning
Plain dehydrated watermelon is delicious on its own, but you can get creative.
A light dusting of sea salt, chili powder, or even Tajín adds a tangy kick.
Just go easy, since the natural sugars are already intense.
3. Condition Before Storing
Before sealing your dehydrated watermelon in jars, let it cool completely and condition it.
Conditioning means placing the dried slices in a sealed container for a week and shaking it daily.
If you spot condensation inside, the watermelon needs more drying time.
4. Store It Properly
Keep your finished dehydrated watermelon in airtight jars or vacuum-sealed bags.
Store them in a cool, dark place, and they’ll stay fresh for 6 to 12 months.
For even longer shelf life, pop the jars in the freezer.
So, Can You Dehydrate Watermelon in a Dehydrator?
You can dehydrate watermelon in a dehydrator, and it’s one of the easiest ways to turn a summertime fruit into a year-round snack.
Just slice it thin, dry it at 135°F, and wait until the slices are leathery with no moisture inside.
Once you learn how to dehydrate watermelon in a dehydrator, you’ll never look at a leftover melon the same way again.