You might not realize it but swimming in your pool can make you dehydrated. When this happens, you can feel sick and dizzy and even need to see a doctor. Luckily, you can avoid this situation by giving your body just the thing it needs most: water. Here are five snacks that pack plenty of water for a day by the pool. 

1. Cucumber slices: These light and delicious treats have the highest water content of any food that's a solid, according to Health.com. Chop it up and eat it plain or garnish your salad with some slices. In total, it has more than a 97 percent water content, explained Health.com, which means it can give you a good amount of H2O that your body needs.

2. Watermelon: Not only is this seedy fruit a delicious summer time favorite, but it's also a great way to stay hydrated when you're running around or swimming. Live Strong pointed out that watermelon has a water content of over 90 percent. It's also a good source of vitamins and minerals. Eat it by itself or toss it into your favorite smoothie. 

3. Celery: ABC suggested celery as a filling, low caloric snack. The veggie has merely 6 calories but more than 95 percent water content. Dunk it in peanut butter for a nutritional snack or try adding some ranch dressing for a little flavor. You can even throw some stalks into a blender with your shake or use them in a salad. 

4. Strawberries in yogurt: Double up on your water intake by chopping up strawberries and tossing them into yogurt. The fruit is 92 percent water and is also a good source of folate and vitamin C, according to Active.com. Yogurt, which is rich in probiotics, has about 29 percent water. Together it's the ultimate thirst quenching and healthy pool treat. 

5. Grapefruit: As Weather.com pointed out, grapefruit is a great way to stay hydrated. It's more than 90 percent water and it's delicious yet refreshing.

If you're ever unsure about how much water you should drink on a regular basis, a good rule is to consume about half of your body weight. Spokesperson for Seattle sports dietician Kim Larson told the source that if a person weighs 150 pounds, then they should drink 75 ounces of water each day.

Don't let dehydration get the best of you, especially if you live in an area like San Diego or Fort Worth where it's warm most of the year.