The importance of encouraging children to stay hydrated on warm outdoor days

Why hydration is critical for a child’s health and wellbeing

Water plays a vital role in nearly every function of a child‘s body. During warm weather, children can lose fluids quickly through sweating, especially when running and playing outdoors for long periods. Replacing those fluids is essential for helping the body function properly. 

Hydration also affects how children feel and perform throughout the day. Even mild dehydration can leave younger ones feeling tired, irritable or less able to concentrate. According to the American Academy of Paediatrics, being well hydrated can improve children’s mood, memory and attention (Rethy, 2024). These benefits are particularly important in nursery and school settings, where focus and learning are integral to daily activities. 

Beyond the classroom, proper hydration helps children stay active and enjoy outdoor play safely. When children drink enough water, they are better able to handle warm temperatures and participate comfortably in the activities they enjoy. 

The prevalence and risks of dehydration 

Dehydration is more common in children than many people realise. In fact, studies suggest that about half of all children don’t drink enough water each day (CCA Education, n.d.). This can become even more of a concern during warm weather, when outdoor play and other physical activities increase fluid loss through sweating.

Youngsters are particularly vulnerable because they may become absorbed in play and forget to stop for a drink. They also have smaller bodies and can become dehydrated more quickly than adults. Parents, caregivers and educators play an important role in encouraging regular water breaks throughout the day. 

Recognising the early signs of dehydration can prevent more serious problems. Common symptoms include a dry or sticky mouth, infrequent urination and few to no tears while crying (Pitone, 2023). Children may also appear tired or less interested in activities they normally enjoy. 

While mild dehydration can often be corrected by increasing fluid intake, severe dehydration is a medical emergency. If left untreated, it can become life-threatening and requires immediate medical care (Cellucci, 2025). Understanding the risks and responding early can help keep children safe and ready to enjoy time outdoors. 

The daily water requirements for children 

Children’s water needs vary by age, activity level and the weather. While there isn’t a one-size-fits-all recommendation, health experts offer general guidelines to help families ensure little ones get enough fluids throughout the day. 

According to the Academy of Nutrition and Dietetics, children between the ages of 4 and 8 generally need around 7 cups of fluids per day (Klemm, 2022). Older children typically require 9 cups, especially as they grow and become more active. 

It is also important to remember that fluid needs to increase during hot weather and periods of physical activity. On warm outdoor days, regular water breaks can help children replace lost fluids and stay hydrated while they play and explore. Water should be the primary source of hydration, though milk, fruits and vegetables can also contribute to daily fluid intake. 

Strategies to encourage hydration 

While understanding how much water children need is important, encouraging them to drink enough throughout the day often requires consistent support and straightforward strategies from the adults around them. 

Make water easy to access 

At home, keeping water bottles within reach and offering them with meals and snacks can help build healthy habits. In schools and childcare settings, accessible water stations and scheduled refill opportunities can encourage children to drink throughout the day rather than waiting until they feel thirsty. 

Build hydration into daily routines 

Young children often become so engaged in play that they forget to stop for a drink. Creating routine water breaks can prevent this. For example, educators may encourage students to drink water before outdoor play, after physical activity and when returning indoors. Parents can use similar routines at home, such as offering water before heading outside and after active games. 

Make drinking water more appealing 

Small changes can make hydration more exciting for young children. Allowing them to choose a colourful water bottle, adding fruit slices to water or using reusable cups with their favourite characters can increase interest. 

Include water-rich foods 

Hydration comes from more than drinks alone. Many fruits and vegetables are high in water and can help children meet their fluid needs. Watermelon, cucumber, oranges, strawberries and celery can provide additional hydration during warm weather. 

Keeping children hydrated with healthy habits 

Keeping children hydrated is one of the simplest ways to support their health and wellbeing during warm outdoor days. By understanding their hydration needs and encouraging them to drink regularly, adults can help them stay active and make the most of their time outdoors.