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You can barbecue watermelon by slicing it into thick planks and grilling it hot and fast until it charrs beautifully on both sides.
If you’ve been wondering how to barbecue watermelon without turning it into a mushy mess, the trick is all in the heat, the cut, and the timing.
Watermelon takes on a whole new personality on the grill, becoming smoky, caramelized, and almost savory in the best possible way.
In this post, we’ll walk through exactly how to barbecue watermelon, what to watch out for, and a few tasty ways to serve it.
Let’s fire up the grill.
Why You Should Barbecue Watermelon
When you barbecue watermelon, you transform a humble summer fruit into something unexpected and delicious.
Grilling brings out the natural sugars in watermelon, creating a caramelized crust that balances its juicy interior.
It’s a fantastic way to use up a big melon before it goes soft, and it pairs well with both sweet and savory toppings.
Plus, learning how to barbecue watermelon gives you a show-stopping side dish that nobody saw coming.
1. The Heat Concentrates the Flavor
When you barbecue watermelon over high heat, the surface moisture evaporates quickly.
This concentrates the sugars and makes each bite taste sweeter and richer than raw melon.
That caramelization is what gives barbecued watermelon its signature depth.
2. It Soaks Up Smoke and Seasoning
Watermelon is mostly water, which means it absorbs whatever flavors you throw at it.
A little smoke from the grill, a pinch of salt, or a brush of chili-lime butter all sink right in.
This is why barbecue watermelon works as both a dessert and a savory side.
3. It’s Quick and Easy
You don’t need special equipment or hours of prep to barbecue watermelon.
A hot grill and a few minutes per side are all it takes.
That makes it one of the fastest ways to add a grilled element to any summer meal.
How to Barbecue Watermelon Step by Step
Learning how to barbecue watermelon is simpler than you might think.
Follow these steps and you’ll get perfectly charred slices every time.
1. Choose a Firm, Ripe Watermelon
Pick a watermelon that’s ripe but still firm, not overly soft or mealy.
A firmer melon holds its shape better once it hits the grill grates.
If your watermelon is too ripe, it’ll fall apart before it ever gets a good char.
2. Slice It into Thick Planks
Cut the watermelon into planks about one inch thick.
You can leave the rind on to help the slices hold together, or trim it off for neat edges.
Thick slices are key when you barbecue watermelon because thin ones cook too fast and turn mushy.
3. Pat the Slices Dry
Use paper towels to blot excess moisture from each slice.
Dry surfaces char better, and this step keeps your watermelon from steaming instead of grilling.
It’s a small move that makes a big difference when you barbecue watermelon.
4. Preheat the Grill to High Heat
Get your grill screaming hot, around 450 to 500°F.
Clean the grates and brush them with a little oil to prevent sticking.
High heat is essential because it sears the outside before the inside turns to liquid.
5. Grill for Two to Three Minutes Per Side
Lay the watermelon planks on the grill and don’t move them.
Let them cook for two to three minutes, then flip and repeat.
You’re looking for dark grill marks and a slight softening, not a total collapse.
6. Add Seasoning or a Glaze
During the last minute, brush on a glaze like honey-lime, balsamic, or chili butter.
You can also sprinkle flaky salt, tajín, or fresh herbs right after you pull the slices off.
This is where you really make your barbecue watermelon your own.
Toppings and Serving Ideas for Barbecue Watermelon
Once you know how to barbecue watermelon, the fun part is deciding how to serve it.
Here are some combinations that work every time.
1. Sweet and Tangy
Drizzle grilled watermelon with honey and lime juice, then sprinkle with mint.
The sweetness of the melon, the brightness of the lime, and the cool mint are a perfect match.
2. Savory and Spicy
Top your barbecue watermelon with crumbled feta, chili flakes, and a squeeze of lime.
The salt and heat play off the caramelized sweetness in a way that keeps everyone reaching for more.
3. Dessert Style
Serve grilled watermelon with a scoop of vanilla ice cream or whipped cream.
A drizzle of balsamic glaze turns it into a dessert that feels fancy but took minutes to make.
4. In Salads and Salsas
Chop leftover barbecue watermelon and toss it into a salad or salsa.
It adds a smoky, juicy element that regular watermelon just can’t deliver.
Tips and Mistakes to Avoid When You Barbecue Watermelon
A few small habits make a huge difference when you barbecue watermelon.
Keep these in mind before you start grilling.
1. Don’t Overcook It
Watermelon goes from perfectly charred to soggy in under a minute.
Stay by the grill and pull your slices as soon as they have good marks.
2. Skip the Marinade
Watermelon already holds a lot of water, so a wet marinade just makes it soggier.
Stick to dry rubs or glazes applied at the end instead.
3. Use a Clean, Oiled Grill
Sticky grates will tear your watermelon apart when you flip it.
A quick brush of oil before grilling keeps everything intact.
4. Serve It Warm or at Room Temperature
Barbecue watermelon tastes best fresh off the grill or within an hour.
Once it sits too long, the texture starts to break down.
So, How Do You Barbecue Watermelon?
You barbecue watermelon by slicing it into thick planks, grilling it over high heat for a few minutes per side, and finishing it with your favorite glaze or topping.
It’s a quick, easy way to turn a summer fruit into a smoky, caramelized treat that works as a side, a dessert, or a snack.
Now that you know how to barbecue watermelon, grab a melon and get those grates hot.
Your next cookout just got a lot more interesting.