Sparkling Rosemary Watermelon Lemonade

Julia Nguyen
Julia Nguyen
Published: July 28, 2026
Categories: Fruits, Lemonade
Tags: lemonade, Summer Drinks, Rosemary, Nonalcoholic, Watermelon, Sparkling Drinks, National Watermelon Day

Rosemary Watermelon Lemonade

Fresh watermelon and lemon meet a restrained rosemary syrup and chilled sparkling water in this crisp, nonalcoholic summer pitcher.

Prep Time:25 minCook Time:5 minTotal Time:30 minServings:8Difficulty:Easy

This pitcher begins with ripe watermelon rather than juice or flavored syrup, so the drink tastes clean, fresh, and unmistakably summery. Lemon brings enough acidity to sharpen the fruit without hiding its mellow sweetness.

Rosemary can quickly overwhelm a cold drink, so it is steeped briefly in a light syrup and removed before assembly. The result is an herbal aroma at the edges rather than a savory or piney lemonade.

Straining the watermelon puree gives the finished drink an easy, sip-friendly texture. Add the sparkling water only when everyone is ready for a glass, preserving the lively bubbles that make the pitcher especially refreshing beside a backyard meal.

Serve the lemonade over plenty of ice with small watermelon wedges and lemon wheels. For the best balance, taste the still base before adding sparkling water and adjust with a little more lemon if the melon is particularly sweet.

Nutrition (per serving)

Calories:104 kcal
Protein:1 g
Carbs:26 g

Directions

  1. 1
    Rosemary sprigs pressed gently with the back of a spoon

    Lightly bruise 2 rosemary sprigs with the back of a spoon to release their aroma.

  2. 2
    Rosemary syrup simmering gently in a saucepan

    Combine the bruised rosemary, sugar, and water in a small saucepan. Bring to a gentle simmer over medium heat, stirring until the sugar dissolves, then remove from the heat after 1 minute.

  3. 3
    Rosemary sprigs steeping in clear syrup off the heat

    Let the rosemary syrup steep for 10 minutes, then discard the sprigs and set the syrup aside to cool.

  4. 4
    Watermelon puree being strained into a glass pitcher

    Blend the watermelon in batches until completely smooth and pour the puree through a fine-mesh strainer into a large pitcher, pressing gently with a spoon. Discard the remaining pulp.

  5. 5
    Lemon juice and rosemary syrup added to watermelon juice

    Stir the lemon juice, cooled rosemary syrup, and salt into the strained watermelon juice until evenly combined.

  6. 6
    Chilled watermelon lemonade base in the refrigerator

    Taste the base and add a small squeeze of lemon if the watermelon is very sweet. Refrigerate the base until cold if the ingredients were not already chilled.

  7. 7
    Sparkling water poured into the watermelon lemonade base

    Just before serving, slowly pour in the sparkling water and stir once or twice to combine without knocking out the bubbles.

  8. 8
    Eight garnished glasses of sparkling watermelon lemonade

    Divide the ice among 8 glasses, pour in the lemonade, and garnish each glass with a watermelon wedge, a lemon wheel, and a few leaves from the remaining rosemary sprig.

Ingredients

  • Seedless Watermelon, Cubed:8 cups
  • Fresh Rosemary Sprigs:3
  • Granulated Sugar:1/3 cup
  • Water:1/2 cup
  • Fresh Lemon Juice:1 cup
  • Fine Sea Salt:1 pinch
  • Plain Sparkling Water, Chilled:4 cups
  • Ice Cubes:4 cups
  • Small Watermelon Wedges:8
  • Thin Lemon Wheels:8

Tips & Notes

  • Choose a watermelon that feels heavy for its size and has a creamy yellow field spot for fuller flavor.
  • The strained watermelon-lemon base can be refrigerated for up to 1 day; add sparkling water only at serving time.
  • For a less sweet pitcher, begin with three-quarters of the rosemary syrup and add more after tasting.