Children can become so absorbed in school, play, sport, and everyday activities that drinking water is often the last thing on their minds. Younger children may not recognise thirst until they are already uncomfortable, while older children may simply forget to drink throughout a busy school day.
Good hydration is important for children’s overall health and normal body function. Fluids help regulate body temperature, support digestion, transport nutrients, and replace water lost through breathing, sweating, and going to the toilet.
Children’s fluid needs are not identical. Age, body size, physical activity, climate, diet, and individual health all influence how much fluid a child needs. Requirements can also increase significantly during hot weather, exercise, fever, vomiting, or diarrhoea.
Rather than focusing only on an exact number of glasses, parents can help children develop the habit of drinking regularly throughout the day and recognising when their bodies need more fluids.
Why Is Hydration Important for Children?
Water makes up a significant proportion of the human body and is involved in almost every major body process.
Children need adequate fluids to help their bodies:
▪ Regulate temperature
▪ Support normal digestion
▪ Transport nutrients
▪ Replace fluid lost through sweat and urine
▪ Maintain normal physical and mental function
When children do not drink enough, they may become thirsty, tired, irritable, or develop headaches.
More significant dehydration can make children unwell and requires prompt attention.
How Much Water Do Children Need?
There is no single amount of water that is appropriate for every child.
Fluid requirements change with age and can vary between individual children. Food also contributes water, particularly fruit, vegetables, soups, yoghurt, and other moisture-rich foods.
Health authorities in different countries may provide slightly different recommendations, so parents should follow appropriate local guidance.
Instead of becoming overly concerned about achieving an exact number every day, establish regular opportunities for children to drink.
A child who is exercising outdoors in hot weather will naturally need more fluid than a child spending a quiet day indoors.
Make Water the Everyday Choice
One of the easiest ways to encourage healthy hydration habits is to make water readily available.
Keep children’s water bottles somewhere easy to reach and offer water regularly throughout the day.
If children become accustomed to drinking water from an early age, it becomes a normal part of their routine rather than something they only drink when nothing else is available.
Parents can model the same habit by drinking water themselves.
Children often copy everyday behaviours more readily than they follow repeated instructions.
Build Drinking Into the Daily Routine
Children may simply forget to drink.
Connect water with activities that already happen every day.
For example, encourage children to drink:
▪ With breakfast
▪ Before leaving for school
▪ During school breaks
▪ With lunch
▪ After school
▪ Before, during, and after physical activity
▪ With dinner
Regular opportunities can be easier to remember than repeatedly asking children whether they are thirsty.
Older children can gradually become responsible for remembering and refilling their own bottles.
Choose a Water Bottle Children Can Manage
A practical water bottle can make a surprising difference.
Young children need something they can open, close, and drink from independently.
Make sure it does not leak easily and is suitable for their age.
Older children may enjoy choosing their own bottle, which can encourage them to carry it.
Label bottles clearly for school and wash them regularly according to the manufacturer’s instructions.
Check whether your child’s school allows bottles in classrooms and whether there are convenient places to refill them during the day.
What if Your Child Does Not Like Water?
Children accustomed to sweet drinks may initially find plain water uninteresting.
Make changes gradually.
Try serving water cool if your child prefers it that way or use an appealing reusable bottle.
Depending on age, you might occasionally add pieces of fruit or herbs for flavour, provided they are prepared and stored safely.
Avoid feeling that water always needs to taste sweet.
The aim is to help children become comfortable drinking plain water as an ordinary part of everyday life.
Fruit and Vegetables Can Contribute Fluids
Drinks are not the only source of water.
Many foods naturally contain significant amounts of fluid.
Examples include watermelon, oranges, strawberries, cucumber, tomatoes, yoghurt, soups, and other moisture-rich foods.
These foods can contribute to overall hydration while also providing other nutrients.
However, children still need regular access to appropriate drinks throughout the day.
Food should complement rather than completely replace drinking.
Be Careful With Sugary Drinks
Soft drinks, sweetened fruit beverages, flavoured drinks, and other sugary beverages can contain substantial amounts of added sugar.
When children regularly rely on sweet drinks for hydration, they may become less interested in water.
Frequent sugary drinks can also contribute to tooth decay.
They do not necessarily need to be completely forbidden, but water can remain the normal everyday choice.
Milk or suitable alternatives may also contribute to children’s diets depending on their age and nutritional requirements.
What About Fruit Juice?
Fruit juice contains fluid, but it is not nutritionally identical to whole fruit.
Whole fruit provides fibre and requires chewing, while juice can be consumed quickly.
Recommendations regarding juice differ according to age and local health guidance.
Parents should therefore follow appropriate recommendations for their child rather than using large amounts of juice as the main source of hydration.
Water and whole fruit can remain regular everyday choices.
Children Need More Fluids During Exercise
Active children lose additional water through sweating.
Encourage children to begin physical activity adequately hydrated and provide opportunities to drink during and afterwards.
The amount required depends on the intensity and duration of activity, temperature, humidity, and the individual child.
For ordinary play and many everyday activities, water is usually a practical drink.
Children involved in prolonged or intensive sport may have different hydration needs. Parents can seek appropriate professional guidance when necessary rather than assuming sports drinks are required for every activity.
Pay Extra Attention in Hot Weather
Children can become dehydrated more quickly in hot environments, particularly when they are active outdoors.
Offer fluids regularly rather than waiting for children to ask.
Schedule breaks from vigorous activity, provide shade, and use suitable clothing for the conditions.
Babies and very young children require particular attention because they cannot independently manage their fluid intake.
Never leave children in parked vehicles, even for a short period. Vehicle temperatures can rise dangerously quickly.
Illness Can Increase the Risk of Dehydration
Vomiting, diarrhoea, fever, and some illnesses can cause children to lose more fluid than usual.
Young children can sometimes become dehydrated relatively quickly.
During illness, appropriate fluid replacement becomes particularly important.
Depending on the situation, a healthcare professional may recommend an oral rehydration solution rather than plain water alone because it contains a specific balance of fluids and salts.
Do not substitute homemade mixtures or sports drinks for medically recommended rehydration products without appropriate advice.
Recognise Possible Signs of Dehydration
Parents should know some of the signs that a child may not be getting enough fluid.
Possible signs can include increased thirst, dry mouth, darker urine, urinating less frequently, tiredness, headache, dizziness, or irritability.
Babies may have fewer wet nappies than usual.
More serious dehydration can cause significant sleepiness, weakness, confusion, very reduced urination, or other concerning symptoms.
Seek prompt medical advice if your child appears significantly dehydrated, cannot keep fluids down, is unusually drowsy, or you are concerned about their condition.
Do Not Force Excessive Water
More is not always better.
Children should have appropriate access to fluids, but parents do not need to force large quantities of water beyond their needs.
Excessive water intake can also be harmful in unusual circumstances.
Encourage regular drinking and respond to thirst, activity, climate, and individual needs.
If your child appears excessively thirsty all the time or suddenly begins drinking and urinating much more than usual, speak with an appropriate healthcare professional.
Make Hydration a Habit Rather Than a Battle
Children are more likely to continue healthy habits when they become part of normal family life.
Keep water available, pack bottles for school and outings, offer drinks with meals, and remind younger children during busy activities.
As children grow, give them increasing responsibility.
Eventually, the goal is for them to recognise thirst, remember their bottle, refill it when necessary, and adjust their drinking when they are active or the weather is hot.
Frequently Asked Questions
How much water should my child drink every day?
Children’s fluid needs vary according to age, body size, activity, climate, diet, and health. Follow age-appropriate local health guidance rather than relying on one amount for every child.
How can I encourage my child to drink more water?
Keep water easily available, use a bottle they enjoy, offer it regularly with meals and activities, and model drinking water yourself.
Does milk count towards a child’s fluid intake?
Milk contains fluid and can contribute to hydration as well as providing nutrients. Whether and how much is appropriate depends on the child’s age and overall diet.
Do children need sports drinks when exercising?
For many ordinary activities, water is usually sufficient. Children involved in prolonged or intense exercise may have different requirements, particularly in hot conditions, and individual advice may be appropriate.
How do I know if my child is dehydrated?
Possible signs include thirst, dry mouth, darker or reduced urine, tiredness, dizziness, and irritability. Seek prompt medical advice if your child appears seriously unwell, unusually drowsy, cannot keep fluids down, or shows signs of significant dehydration
