A Keto Watermelon Margarita is exactly what we needed here in Southern California, the weather has been pretty mild so far this summer but late this week, all of the sudden, the temperature shot up over 10 degrees and we’re melting. So, this is a great time to test out more keto-friendly cocktail recipes — and of course, I’m whipping up yet another variation of a low carb, keto margarita! This keto watermelon margarita is oh-so-refreshing with tangy fresh lime juice, fresh juiced watermelon (which, did you know, you can “juice” a watermelon in one of those hand-held citrus juicers? I did not until I learned this helpful trick from one of my favorite Instagram accounts: Boozy Ketones…check out their Watermelon Gimlet, so good)!

Can I drink alcohol on keto?

Yes, alcohol is ok on keto but you have to be careful. Typically, beer is a no-no because of the wheat base and higher carb count, however wines — especially red wines — only have about 3 – 4g of carbs per serving, so in moderation, wine is ok. Most alcohol, like tequila and vodka, are carb-free, so they’re “safe” keto alcohol choices — you have to mind what you mix them with! Look out for sugar-based mixers and opt for club soda as a mixer or sparkling water. “Vodka and the Le Croix” is a very acceptable – although it can get boring – simple keto alcoholic recipe.

I almost always have keto simple syrup in my fridge. I made a mint-infused one for my low carb keto mojitos, but a quick version is to boil water and combine 1-part keto-friendly sweetener with 2-parts hot water. Shake it up in a bottle, allow to cool and voila! Low Carb Simple Syrup!

Ok – so back to my keto watermelon margarita — whip this up and you’ll just want to lounge around in your swimsuit while sipping away!


Low Carb Watermelon Margarita

This watermelon margarita is oh-so-refreshing with tangy fresh lime juice, fresh juiced watermelon and of course, tequila!
Course cocktails
Keyword margarita
Servings 2
Calories 141kcal


  • 4 oz Tequila I like Casamigos
  • 2 oz Keto Simple Syrup
  • 1 lime juiced
  • 4 tbsp watermelon juice
  • 1/2 cup ice


  • Add ice to cocktail shaker.
  • Add all ingredients into the cocktail shaker.
  • Cover and Shake, shake, shake!
  • Pour keto watermelon margarita into glass.
  • Garnish with either lime or watermelon wedges.


Calories: 141kcal | Carbohydrates: 4g | Protein: 1g | Fat: 1g | Saturated Fat: 1g | Sodium: 4mg | Potassium: 34mg | Fiber: 1g | Sugar: 1g | Vitamin C: 10mg | Calcium: 11mg | Iron: 1mg

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