I love watermelons, and summer is my absolute favorite season for this watermelon mint cooler mocktail recipe.

Mostly because it’s the only time we get fresh, juicy watermelon where I live. It’s a seasonal fruit here, and nothing tastes quite as good as watermelon during a hot summer day!

Whenever I buy a big watermelon, I usually eat half of it as-is (because let’s be honest, nothing beats it chilled and plain!), and I turn the other half into a refreshing juice or a cooler mocktail.
It’s a totally free and fun cocktail alternative that my guests love — all flavor, no alcohol.

It’s my go-to when guests come over, and every single person I’ve served this to has loved it. Watermelon has this natural cooling effect on the body, which makes it perfect for scorching summer days.

Besides being delicious, watermelon also adds magnesium and potassium to your diet — both essential for healthy muscles, skin, eyes, digestion, and reducing inflammation.
It keeps you hydrated and feeling full and energized for longer, which is why it’s such a fantastic summer fruit.
It’s one of those rare recipes that tastes good and is also super healthy.

This drink is one of my personal favorites, right next to my Lemon Mint Cooler Mocktail. And trust me, both of these pair amazingly well with pizza during the summer.

Don’t believe me? Make a fully loaded pizza, pour yourself a glass of this watermelon cooler, and take a bite. The combo slaps! I promise your kids (and you!) will keep coming back for more.

Ingredients I use for this Watermelon Mint Cooler Mocktail

Watermelon – About 1.5 kg, chopped and blended to get approximately 400 ml of fresh juice. This serves around 3 people, but feel free to use more if you’re making it for a crowd!

Lemon – Juice of ½ to 1 lemon, depending on how tangy you like it.
(You can also sub this with fresh lime juice if you prefer the flavor of lime.)

Fresh Mint Leaves – ½ cup, torn roughly to help release all the refreshing minty flavor.

Soda Water – 300 ml, adds that fizzy twist and keeps it light.
(Club soda also works great here for that crisp fizz.)

English Cucumber – ½ cucumber, thinly sliced for a crisp, cooling note.

Honey (Optional) – Add 1 tsp or to taste if your watermelon isn’t sweet enough.
You can also add sugar if needed, depending on your watermelon.

How to make this Watermelon Mint Cooler Mocktail

1. Take watermelon pieces and cut them into cubes or random small pieces—whatever is easier. Then, put these slices into a blender and blend until smooth.

After that, pour the juice through a strainer and make sure you’ve got a container underneath to collect the juice. This helps separate the juice from all the pulp.

2. Now, pour this juice into a jar or large container and add the rest of the ingredients: soda water, lemon juice, torn mint leaves, and cucumber slices.
I used a large vessel for mixing because it’s easier to mix everything together that way, but you can use a jug, too, if that’s what you have.

3. For the best flavours, keep this in the fridge for 3 to 4 hours. If you’ve got the time, you can even leave it overnight.

The longer it chills, the better it tastes, trust me.

When you’re ready to serve it, add a few ice cubes if needed, top with some extra mint, and maybe pop a cucumber slice on the rim of the glass to make it look pretty.

You can also add a sprig of fresh mint for that mint mojito mocktail vibe.

Tips for the Perfect Watermelon Cooler

1. Make it ahead of time. Let it sit in the fridge for a few hours — this allows all the mint and cucumber flavors to infuse into the watermelon juice. The longer it rests, the more refreshing it tastes!

2. Add ice if you want to chill it quickly before serving. It is perfect for last-minute guests, especially during summer!

3. Want it sweeter? Add a spoonful of honey if you want the drink to be sweeter. I liked it without any, but it depends on how sweet your watermelon is as well.