Watermelon Juice

By Amy Flanigan

Updated May 29, 2025

Read 1 Review

Prep 5

Servings 3 (about 3 & 1/2 cups of juice total)

By Amy Flanigan

Updated May 29, 2025

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This quick and easy Watermelon Juice recipe is essential for hot summer days. Just blend together some fresh watermelon with two additional simple ingredients and enjoy cooling off with a refreshing drink.

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Looking for a refreshing summer drink that can be enjoyed by the entire family? Look no further than this Watermelon Juice! Made with fresh watermelon, lime, and simple syrup this recipe is the best way to take advantage of sweet and juicy summer watermelon. It can be made in minutes and it’s so refreshing on a hot day that we keep some in the fridge all summer long!

This recipe makes enough for 3 glasses but if you want extra or to serve a group, just double the recipe to fill up a pitcher like the photos.

Looking for more ways to use up fresh watermelon? Be sure to check out our Watermelon Salad, Watermelon Popsicles, and Watermelon Sangria.

Helpful Tips & Variations

Watermelon. You can use a large watermelon or a mini watermelon, seedless or with seeds since you will be straining the juice. If you choose not to strain it you will likely need to deseed the watermelon before making the recipe.
Sweetener. You can make your own simple syrup by boiling equal parts water and sugar until the sugar dissolves and thickens, then let cool, or buy some at the store. The amount needed will depend on how naturally sweet your watermelon is. You can use granulated sugar instead of simple syrup, but it may not fully dissolve, so it’s not my preference. Honey or agave are also great alternatives.
Lime juice. You can use lemon juice instead of lime juice as an alternative. Though fresh lime or lemon juice works best you can also use juice from concentrate as well.

5 from 1

Watermelon Juice

Prep: 5

Total: 5

Servings: (about 3 & 1/2 cups of juice total)

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This quick and easy Watermelon Juice recipe is essential for hot summer days! It's kid and family friendly, although alcohol can be added for an adult beverage.

Ingredients

▢ 3 cups fresh cubed watermelon
▢ 3 tablespoons simple syrup
▢ 1 & 1/2 tablespoons lime juice
▢ watermelon slices, , optional garnish
▢ lime slices, , optional garnish

Instructions

Place the cubed watermelon, simple syrup, and lime juice in a food processor or blender and blend for about 2-3 minutes or until the mixture forms a thick liquid.
Pour the juice through a fine mesh sieve to strain out the seeds and any large pulp. Use a spoon to stir up the pulp and push out all the liquid.
Drink chilled with sliced lime or watermelon garnishes, optional.
*If you want to make this with alcohol for grown-ups, see note below.

Notes

Boozy Watermelon Juice. You can add in some alcohol for a grown up drink. Vodka is most commonly added to watermelon and works well in this recipe. A common juice to vodka ratio is 2:1, however, watermelon juice is a light flavor so you may want to start with less vodka and add more to taste.

Double the recipe. This recipe makes enough for 3 glasses but if you want extra or to serve a group, just double the recipe to fill up a pitcher like the photos.

Nutrition

Nutritional information given is an automatic calculation and can vary based on the exact products you use and any changes you make to the recipe. If these numbers are very important to you, I would recommend calculating them yourself.

Did you make this? Leave a rating below!

Overhead angled view of a pitcher of watermelon juice

Watermelon Juice Benefits

I love this juice because not only is it refreshing, it’s super hydrating. Watermelon is 92% water. This juice is a great way to stay hydrated in the summer heat, especially when water feels too boring.

Not to mention it’s full of antioxidants, vitamins, amino acids, and all other good stuff that helps nourish your entire body. (Source) Plus watermelon is naturally sweet so a tall glass of watermelon juice can curb your sweet tooth too. (You can use less simple syrup if sugar is a concern.)

Serving Suggestions

This Watermelon Juice is kid and family friendly but if you’d like to spice it up for an adult summer party simply add vodka and mix it up! A common juice to vodka ratio is 2:1, but I recommend starting with less vodka and adjust to taste.

If you want to take this up to a fancy cocktail version pour some lime juice in a shallow dish and white granulated sugar in a second shallow dish and then dip the rim of your glasses in the juice and then the sugar to create a sugar rimmed glass. Pour in the adult version of the watermelon juice and go impress your guests!

How to Store & Freeze

Storing leftovers. Any leftover watermelon juice should be stored in an airtight container in the refrigerator and used within 3-4 days.
To freeze. You can also freeze this watermelon juice for 1-2 months. It will expand when frozen so be sure to store it in a container large enough to accommodate that. It can be thawed in the fridge or on the counter. Some separation is normal.

More Summer Drink Recipes:

I hope you love this delicious and easy recipe – be sure to give it a review below! Also don’t forget to follow Belly Full on TikTok, Facebook, Instagram, Pinterest, and YouTube!

Overhead view of a glass of watermelon juice garnished with a lime slice and watermelon

Watermelon Juice

Helpful Tips & Variations