Can Watermelon Count as Water Intake?

December 3, 2025 •

2 min read

According to the Centers for Disease Control and Prevention (CDC), daily fluid intake is comprised of water from foods, plain drinking water, and other beverages. So, can watermelon count as water intake? This juicy fruit, which is about 92% water, is an excellent source of hydration and helps you meet your daily fluid needs.

Quick Summary

Watermelon significantly contributes to daily fluid intake due to its high water content. This juicy fruit is a delicious way to stay hydrated, providing essential vitamins, antioxidants, and electrolytes along with its fluid.

Key Points

High Water Content: Watermelon is composed of approximately 92% water, making it a highly effective hydrating food.
Food Counts as Fluid: Health authorities confirm that water from foods, not just drinks, contributes to your total daily fluid intake.
Nutrient-Rich Hydration: Along with fluid, watermelon provides electrolytes like potassium and magnesium, plus vitamins A and C.
Digestive Benefits: The combination of water and fiber aids in healthy digestion and promotes regularity.
Low Calorie Density: Watermelon's high water content and low calorie count can promote a feeling of fullness, which may assist with weight management.
Antioxidant Power: Watermelon is packed with antioxidants like lycopene, which combat free radicals and may support heart health.

The Science Behind Watermelon and Hydration

At approximately 92% water by weight, it's no surprise that watermelon has 'water' in its name. While many people focus only on drinking water for hydration, health organizations like the Mayo Clinic and the CDC confirm that a person's total fluid intake includes water from the foods they consume. Your body depends on water for all its vital functions, from regulating body temperature to transporting nutrients. Even mild dehydration can lead to fatigue and drain your energy.

Watermelon's high water content is stored within its cellular structure, allowing the body to absorb fluid and nutrients gradually. It also contains essential electrolytes like potassium and magnesium, which help maintain fluid balance and are important after sweating or exercise. Some suggest adding a little salt after a workout for electrolyte replenishment.

Watermelon's Nutritional Perks Beyond Hydration

Beyond hydration, watermelon offers numerous nutritional benefits.

Packed with Vitamins and Antioxidants

Watermelon is a good source of immune-boosting vitamin C and vitamin A, important for vision and skin. Its red color comes from lycopene, a powerful antioxidant that may help reduce inflammation and lower the risk of chronic diseases, though more research is needed.

Benefits for Digestion and Fullness

The high water content and small amount of dietary fiber support digestive health and can prevent constipation. Watermelon is a low-calorie-density food, promoting fullness which can help with weight management.

Watermelon vs. Plain Water: A Hydration Comparison


Feature	Watermelon	Plain Water
Primary Hydration Source	Food	Drink
Water Content	~92% by weight	100%
Nutrients	Vitamins (A, C), minerals (potassium, magnesium), antioxidants (lycopene)	Minimal, if any
Electrolytes	Contains natural electrolytes	None, unless mineral water or supplemented
Calorie Content	Low, ~46 calories per cup	Zero
Satiety	High due to water and fiber content	Helps, but no fiber
Best Use	As a hydrating snack or meal component	Primary source for daily fluid intake

Incorporating Watermelon into Your Diet for Hydration

Here are some ways to add watermelon to your diet:

Snack on Fresh Slices: Enjoy it as a simple, hydrating treat.
Create a Watermelon Salad: Combine with feta, mint, and lime juice.
Blend into Smoothies: Mix with other fruits.
Make Watermelon-Infused Water: Add chunks to water with cucumber and mint.
Prepare Frozen Treats: Puree and freeze into ice pops.
Grill It: Grill slices for a unique flavor.

Potential Considerations and Best Practices

While watermelon contributes to hydration, it doesn't fully replace plain water, especially during hot weather or intense activity. Due to natural sugars, those monitoring blood sugar should consume it in moderation. The American Diabetes Association suggests consuming fresh or canned fruit without added sugars. For more on fluid intake, consult resources like the CDC website.

Conclusion

Yes, watermelon counts as water intake and is a great way to boost your daily fluid goals. Its high water content, vitamins, minerals, and antioxidants make it a healthy addition to your diet. Incorporating watermelon and other water-rich foods, along with drinking enough water, is key for optimal hydration.

Frequently Asked Questions

While it can't replace drinking plain water entirely, watermelon can account for a significant portion of your fluid intake. Some experts say up to 20% of your daily fluid needs can come from food, and watermelon is a great way to contribute to that total.

Watermelon offers more than just water; it provides electrolytes, vitamins, and antioxidants. However, plain water is still the best source for consistent hydration throughout the day.

Watermelon consists of about 92% water by weight, making it one of the most hydrating fruits available.

Since watermelon is mostly water, it is generally fine to eat before bed and is unlikely to disrupt your sleep. However, excessive amounts could lead to more frequent nighttime urination.

Yes, watermelon can be a healthy fruit choice for people with diabetes in moderation, as it contains natural sugar. The American Diabetes Association recommends consuming fresh fruit without added sugars.

Yes, other fruits are also very hydrating. For example, strawberries are about 92% water, cantaloupe is about 90% water, and cucumbers (botanically a fruit) are even higher at around 96% water.

Yes, watermelon contains the amino acid citrulline, which has been studied for its potential to improve blood flow and reduce post-exercise muscle soreness. Its high water and electrolyte content also aids in recovery.