This Watermelon Gin Fizz Cocktail is a refreshing and summery take on the classic gin fizz cocktail. Made with a sweet-tart watermelon juice and a floral gin, this silky smooth cocktail is a must make for the summer! 

watermelon cocktail in a rocks glass set on two white coasters

Why We Love This Recipe for Watermelon Gin Fizz

This Watermelon Gin Fizz is the perfect light and refreshing cocktail for summer. A great option when you’re sick of all the margaritas, canned seltzers and summer shandys served all summer long. It’s also a great way to use up any leftover watermelon if you try this delicious Watermelon Tomato Salad.

If you enjoy this Watermelon Gin Fizz and like to experiment with cocktails at home, check out this Sloe Gin Fizz recipe. After many tests and much research, I think it’s the best sloe gin fizz recipe around. 

bottle of gin, two lemons, egg white, honey, club soda and diced watermelon set out on a counter

Ingredients for This Watermelon Cocktail


For this cocktail, I recommend using a London Dry Gin that’s fairly floral. I like Bloom Gin which has more citrus and floral notes and less juniper and overall “heat.” 


I prefer to use Black Diamond watermelon for this recipe. This type of watermelon has a vibrant pink flesh and a dark green rind. It’s super sweet and labeled as “seedless,” which just means it has less seeds than traditional watermelons. 


If it isn’t fresh, we don’t want it! Fresh lemon juice is blended with the watermelon to create a sweet-tart juice. Without the gin, this is a delicious watermelon lemonade. 


Most classic gin fizz recipes are made with a bit of simple syrup. This recipe skips the simple syrup and instead sweetens the watermelon juice with honey. This quick swap makes shaking up the cocktail a breeze. 

Egg White 

Egg white is traditional in gin fizz and for good reason. When shaken (without ice) the egg white gets aerated and creates a silky cocktail with a deliciously foamy head. The use of fresh eggs is traditional in cocktail making, but I prefer to use egg whites from a carton for a couple of reasons. First, it’s just easier and less fussy. And two, it’s actually safer because the egg whites are pasteurized. 

Club Soda 

Most gin fizz cocktails get a splash of club soda right before serving. It simply adds a little effervescence. If you don’t have any on hand, no worries. Don’t let that keep you from making this. The cocktail is just as delicious with it as it is without it. 

Step-By-Step Instructions 

Step 1: Make the watermelon juice 

Add the watermelon, lemon juice and honey to a blender. Blend until smooth.

Step 2: Strain the watermelon juice

Strain the juice through a fine mesh sieve then discard any pulp. 

two images, one with watermelon juice in a blender bottle and two watermelon juice being passed through a sieve into a liquid measuring cup

Step 3: Dry shake the ingredients 

Add the watermelon juice, gin, and egg white to a cocktail shaker. Secure lid and shake vigorously until pale-pink, about 15 seconds. 

Step 4: Shake with ice to chill

Fill the shaker with ice, secure lid, and shake again until well-chilled, about 15 seconds. 

Step 5: Garnish and enjoy 

Strain the cocktail over a few ice cubes into a rocks or collins glass. Top the cocktail off with a splash of chilled club soda. Garnish with a watermelon wedge and serve immediately. 

watermelon cocktail in a rocks glass

Expert Tips

  • For ease of preparation and cleanup, I like to use an individual blender cup instead of my full-size blender. If you go this route, you may need to blend half of the watermelon before adding the other half, just to make space. 
  • The watermelon juice can be made up to 3 days ahead of time. Store it in an airtight container in the refrigerator. 
  • If you don’t want to use an egg white, no problem! Simply skip it and just shake the cocktail with ice from the start. 

Additional Recipes to Try

Thanks so much for reading! If you make a batch of these homemade Watermelon cocktails, please come back and let me know by leaving a star rating and review! Cheers!

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watermelon cocktail in a rocks glass set on two white coasters

Watermelon Gin Fizz Cocktail

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

5 from 4 reviews

  • Author: Lauren Grant-Vose
  • Total Time: 10 minutes
  • Yield: 12 ounces watermelon juice (enough for 4 cocktails) 1x
  • Diet: Gluten Free


This Watermelon Gin Fizz is a refreshing and summery take on the classic gin fizz cocktail. Made with a sweet-tart watermelon juice and a floral gin, this silky smooth cocktail is a must make this summer! 



Watermelon Purée

  • 3 cups cubed watermelon
  • 1/4 cup fresh lemon juice
  • 2 tablespoons honey

For 1 drink:

  • 3 ounces watermelon juice
  • 2 ounces London Dry gin
  • 3/4 ounce egg white (1 egg white)
  • Club soda, to top (about 1/2 ounce)


Watermelon Juice

  1. Add watermelon, lemon juice and honey to a blender and blend until smooth. Pass through a fine-mesh sieve. Discard pulp. 


Watermelon Gin Fizz

  1. Add 3 ounces watermelon juice, 2 ounces gin, and egg white to a shaker and dry-shake (without ice) for about 15 seconds.
  2. Add ice and shake until well-chilled.
  3. Double-strain into a highball glass or rocks glass over 2 ice cubes.
  4. Top with the club soda.
  5. Garnish with a watermelon wedge. 


Watermelon juice can be made up to 3 days ahead of time. 

  • Prep Time: 5 minutes
  • Cook Time: 5 minutes
  • Category: Drink
  • Method: No-cook
  • Cuisine: American


  • Serving Size: 1 cocktail
  • Calories: 149
  • Sugar: 16 g
  • Fat: 0 g
  • Carbohydrates: 19 g
  • Fiber: 1 g
  • Protein: 3 g