How to Make a Watermelon Mojito

This watermelon mojito blends white rum, fresh mint, lime, watermelon juice and club soda into a crisp, refreshing cocktail—perfect for warm weather and backyard gatherings.

Light, fruity and effervescent, this watermelon mojito is an easy summer drink that highlights the clean sweetness of watermelon with bright lime and cooling mint. It’s simple to make at home and scales easily for parties.

A cup of watermelon mojito topped with fresh mint, lime and fresh watermelon.

When temperatures rise, a pitcher of this mojito keeps guests refreshed. The recipe calls for a small amount of simple syrup to balance the tart lime and mellow watermelon. Freshly squeezed lime juice and freshly torn mint leaves make a real difference in the flavor.

Watermelon Mojito Ingredients

Ingredients including club soda, watermelon juice, lime and mint.

You will need the following ingredients to make one serving:

  • 1 tablespoon hot water
  • 1 tablespoon granulated sugar (to make simple syrup)
  • 8 fresh mint leaves
  • 1½ ounces white rum
  • 1 ounce freshly squeezed lime juice
  • 3½ ounces watermelon juice (or strained watermelon puree)
  • 2 ounces club soda or sparkling water
  • Garnishes: mint sprigs, watermelon slices and lime wedges

How Do You Make A Watermelon Mojito?

Follow these straightforward steps to prepare the cocktail:

Mint and sugar syrup muddled in a glass.
  1. Make the simple syrup: stir 1 tablespoon granulated sugar into 1 tablespoon hot water until fully dissolved. Let cool slightly.
  2. Place the mint leaves in the bottom of a sturdy glass and add the syrup. Gently muddle the mint to release its oils—press and twist rather than shredding.
  3. Add ice to the glass, then pour in the white rum, lime juice and watermelon juice.
  4. Top with club soda and stir gently to combine, keeping some fizz in the drink.
  5. Garnish with a sprig of mint, a lime wedge and a small watermelon slice. Serve immediately.

Tips For The Perfect Drink

  • Use a muddler for best results—gently bruise the mint to release aroma without making the leaves bitter.
  • This recipe yields one serving. Increase the ingredient quantities proportionally to make multiple servings or a pitcher.
  • Store-bought refrigerated watermelon juice is convenient; alternatively, blend fresh watermelon and strain to remove pulp for a smoother drink.
  • Always use freshly squeezed lime juice—bottled lime juice lacks the bright acidity that complements the watermelon.
  • To rim the glass for an elegant finish: moisten the rim, then dip it in sugar for a frosted look.

Recipe FAQs

What does a watermelon mojito contain?

A watermelon mojito contains watermelon juice, white rum, club soda (or sparkling water), fresh mint, sugar (simple syrup) and lime juice.

What alcohol goes best with watermelon?

Watermelon pairs well with white rum, vodka or tequila. White rum is traditional for mojitos and complements watermelon’s sweet, juicy flavor.

What’s the difference between a mojito and a virgin mojito?

A classic mojito includes alcohol—typically rum—while a virgin mojito omits the alcohol and relies on watermelon, lime, mint and soda for the same refreshing taste.

Rum, lime juice, watermelon juice and club soda being poured into a cup.

Flavor Variations

Experiment with these swaps to change the character of the drink while keeping it simple and balanced:

  • Fruit: Replace watermelon juice with mango nectar, pomegranate juice, passion fruit or cranberry juice for a different fruit profile.
  • Club Soda: Try lime-flavored sparkling water or a flavored soda if you prefer a sweeter, more aromatic finish.
  • Alcohol: Swap white rum for vodka or a coconut-flavored rum for a tropical twist.
A glass of watermelon mojito with a slice of watermelon and lime wedge on top.

Nutrition

Approximate nutrition per serving:

  • Calories: 97 kcal
  • Carbohydrates: 26 g (Sugar: ~21 g)
  • Protein: 1 g
  • Fat: 0.2 g
  • Fiber: 2 g
  • Vitamin C: 27 mg

Notes

  1. For a smoother texture when using fresh watermelon, strain the blended puree through a fine-mesh sieve before mixing.
  2. Adjust the simple syrup amount to taste if your watermelon is very sweet or very tart.
  3. To serve a crowd: multiply ingredients and prepare the simple syrup in advance. Add club soda just before serving to retain carbonation.