Name: Sparkling Watermelon Lemonade — Easy Refreshing Summer Picnic Drink Recipe
Prep time: 15 min
Total time: 45 min
Yield: 8 servings
Cuisine: American
Ingredients: 6 cups seedless watermelon (cubed, about half a small melon); 3 lemons (juiced, about 1/2 cup fresh juice); 3 tablespoons granulated sugar (or more to taste); 2 tablespoons water (for the quick syrup); 3 cups sparkling water (cold, added just before serving); 1 cup ice (for serving); fresh mint and lemon slices (optional garnish)

Jump to Recipe

My kids started requesting this the second they see a whole watermelon on the counter, which is basically the highest review I've ever gotten.

It takes about 15 minutes of actual work, and most of that is just cutting fruit. The rest is the freezer doing its job.

Sparkling Watermelon Lemonade — Easy Refreshing Summer Picnic Drink Recipe

Fresh watermelon and tart lemon come together in a fizzy, blush-pink drink that makes any backyard feel like a celebration.

4.5 (152 reviews)

VeganGluten-freeDairy-free

Prep15 min

Chill time30 min

Total45 min

Serves8 servings

Ingredients

6 cups seedless watermelon , cubed, about half a small melon
3 lemons , juiced, about 1/2 cup fresh juice
3 tablespoons granulated sugar , or more to taste
2 tablespoons water , for the quick syrup
3 cups sparkling water , cold, added just before serving
1 cup ice , for serving
fresh mint and lemon slices , optional garnish

Instructions

Add the watermelon cubes to a blender and blend on high for about 20 seconds until completely smooth. The mixture will look almost fluorescent pink and smell intensely sweet, like summer in a glass.

Pour the blended watermelon through a fine mesh strainer into a large pitcher or bowl, pressing with the back of a spoon to push all the juice through. Discard the pulp. You should have roughly 2 to 2.5 cups of clear, jewel-red juice.

Combine the sugar and 2 tablespoons of water in a small saucepan over medium heat. Stir for about 2 minutes until the sugar fully dissolves and the liquid looks completely clear. Remove from heat and let it cool for 5 minutes before adding it to anything cold.

Add the fresh lemon juice and the cooled simple syrup to the watermelon juice in your pitcher. Stir well and taste. It should be bright and tart with the watermelon sweetness behind it. Adjust with a little more syrup or lemon if needed.

Refrigerate the watermelon lemonade base for at least 30 minutes until cold. This step matters. Pouring warm juice over ice just dilutes everything before anyone gets a sip.

When ready to serve, pour the cold sparkling water slowly down the side of the pitcher and give it one gentle stir. You'll hear a soft hiss and see the whole pitcher lift into a fizzy, pale coral color. Fill glasses with ice and pour immediately.

Tips & Notes

Freeze watermelon cubes the night before for a slushy, extra-cold version. Blend them straight from the freezer and skip the chilling step entirely.
Freshly squeezed lemon juice is not optional here. Bottled juice tastes flat against the watermelon and you'll notice immediately.
If you're serving a crowd, make the watermelon lemonade base up to 24 hours ahead and keep it covered in the fridge. Add the sparkling water only when glasses are in hand.
Taste your watermelon before you start. A sweet melon needs less syrup. A bland one might need an extra tablespoon.

Nutrition per serving · estimated

52 Cal

13g Carbs

1g Protein

11g Sugar

10mg Sodium

Why the base needs time in the fridge

The 30-minute chill is not optional padding on the total time. A warm juice base flattens the sparkling water the second they meet, and you lose that clean fizz that makes this drink worth making.

If you're prepping for a picnic, make the base the morning of and keep it in a sealed jar in a cooler. Add the sparkling water on-site. Two minutes of effort, and it tastes like you just made it.

What makes this work at a picnic

This drink travels well precisely because you keep the components separate. The base is stable for hours in a cold cooler. The sparkling water stays in its bottle until the moment you pour.

Bring a small cutting board and a lemon for extra slices as garnish. It looks deliberate and takes 30 seconds. People always ask what you did differently.

Sparkling Watermelon Lemonade — Easy Refreshing Summer Picnic Drink Recipe