Can Babies Drink Water Before 6 Months? The Honest Answer
Under six months, breast milk is the only drink WHO advises, even in the hot months, and that includes plain water. WHO’s rule allows extra food or drink only when medically necessary.
This guide is part of our Bachon Ki Sehat section. Can babies drink water before 6 months? Parents ask it every summer, often because someone close insists that a few sips will settle the baby, and the short answer is no before six months. The rest of this page explains what to count, what changes with age, and how water fits in after the six-month mark.
At a glance
- Before 6 months: breast milk alone, with no water or other extra drink, such as gripe water, sugar water or herbal drops.
- Why: WHO’s definition of exclusive breastfeeding is that the baby is fed only breast milk for the first 6 months.
- Solids: the NHS says weaning starts when your baby is around 6 months old.
- Dehydration signs: fewer wet nappies, a dry mouth, few or no tears, a sunken soft spot, or no urine for about 8 hours.
- Quotable line: before six months, the feed is the drink, even on the hottest day.
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Can babies drink water before 6 months?
No. Not even a sip. Exclusive breastfeeding means the baby is fed only breast milk for the first six months. One of WHO’s Ten Steps to Successful Breastfeeding, which WHO sets as the standard of care in maternity services, asks services to avoid giving babies additional food or drink, even water, unless medically necessary. For a formula-fed baby, that WHO advice is written for breastfeeding, so ask a doctor before adding any drink, and let a doctor, not a relative or a shop assistant, decide on any change to what the baby drinks.
Myth: a baby in summer needs a few sips of water
The belief is simple. The weather is hot, so the baby must be thirsty, and a spoon or two of water will cool them down, which sounds sensible in a warm room with a fussy child in your arms. It feels kind, which is why the habit lasts. Kind is not the same as needed. A restless or crying baby can be hungry, uncomfortable, too warm or unwell, and a sip of water is not a way to tell which. The useful next step is a feed, a quick check of the room and the nappies, and a call to the doctor if something seems off, since each of those looks at the real cause rather than assuming thirst.
Many households give a few sips of plain water to settle a stomach or to cool a hot baby. It is passed down with love from one generation to the next. Under six months, the WHO guidance above stands, however kindly the habit was meant.
What is safe to give at each age?
| Age band | Water advice |
|---|---|
| Under 6 months | None extra. Breast milk alone, as WHO advises. For a formula-fed baby, ask a doctor before any extra drink, even in summer. |
| 6 to 12 months | Only when a doctor or health worker says so. Solid food starts around this age. |
| 1 to 3 years | Ask your health worker how much water is right, and when to start a cup. |
| 3 to 6 years | Ask your doctor how much plain water a child this age needs each day. |
| Over 6 years | Ask your doctor if you are unsure about daily fluids. |
How can I tell a hot baby from a dehydrated one?
A hot baby and a dehydrated baby can look alike, so the test is what the baby is doing and passing, not how sweaty or flushed they feel. CDC’s emergency warning signs for children with flu include dehydration, described as no urine for 8 hours, a dry mouth and no tears when crying. The NHS lists fewer wet nappies, a dry mouth, few or no tears, and a sunken soft spot or sunken eyes as signs to act on. The table below sets out the signs and the action for each.
| Sign | What it can mean | What to do |
|---|---|---|
| Fewer wet nappies than usual | Possible dehydration | Count them and ask for an urgent GP appointment or call NHS 111 |
| No urine for about 8 hours | Dehydration (a CDC warning sign) | Get medical care now |
| Dry mouth or few or no tears when crying | Dehydration | Ask for an urgent GP appointment or call NHS 111 |
| Sunken eyes or a sunken soft spot | Dehydration | Ask for an urgent GP appointment or call NHS 111 |
| Very sleepy or hard to wake | Possible serious illness | Call 999 or go to A&E |
How do I count wet nappies without guessing?
Keep a simple tally, one mark for each wet nappy and each feed, on the fridge calendar or in a phone note, so the picture of the whole day is visible at a glance instead of from memory at 3 in the morning. Feeding volumes by month are covered in our feeding schedule by month. Ask the doctor what a normal count looks like for your baby’s age and feeding. A sudden drop from that usual pattern, along with the time of the last wet nappy, is exactly what a doctor needs to hear, so write both down before you call.
The one-line feed note
Next to each feed, write the time, the amount if you know it, and any wet nappy. A week of these lines shows the pattern. Bring the note to the visit, so the doctor can judge the day’s count from written lines rather than memory.
What should a summer plan look like under six months?
- Keep feeding as usual. Do not swap a feed for water. For wider summer care, see our newborn summer care guide.
- Dress the baby lightly and keep the room comfortable. Light clothing and a comfortable room are the starting point for a warm baby.
- Count wet nappies every day. Use the tally above and note any change from the usual pattern.
- Check the mouth, the tears and the soft spot. A dry mouth, few or no tears, or a sunken soft spot means ask for an urgent GP appointment or call NHS 111.
- Ask before any change to fluids. Ask your doctor before any drink or rehydration product for a baby under six months.
What changes after six months?
Solid food starts around six months, according to WHO and the NHS. Our weaning plan from 6 months sets out the first foods in order, and it is the place to plan the food question alongside the water question, one step at a time. When to offer a cup of water with meals is a question for your doctor or health worker, so ask at the next visit. Ask first, always.
Under six months, do not give water, gripe water, sugar water, herbal drops or any home drink. Ask for an urgent GP appointment or call NHS 111 for fewer wet nappies, a dry mouth, few or no tears or a sunken soft spot. Call 999 or go to A&E for a baby who is very sleepy, hard to wake, or breathing with trouble. Any fever in a baby under 12 weeks is on CDC’s list of warning signs, so get urgent medical care for it.
Water questions parents ask about babies
Can babies drink water before 6 months?
No. Before six months, breast milk is the drink WHO advises. WHO advises avoiding additional food or drink, even water, unless medically necessary.
Can a 3 month old baby have water in summer?
No. Keep feeding as usual. If the baby seems very hot, unwell or dry, call a doctor rather than offering water, because the cause needs checking.
When can a baby have water after 6 months?
Solid food usually starts around six months, according to WHO and the NHS. Ask your doctor or health worker when to add a cup of water with meals, since the right timing depends on the baby.
What are the signs of dehydration in a baby?
Fewer wet nappies than usual, a dry mouth, few or no tears when crying, sunken eyes or a sunken soft spot, and no urine for about 8 hours. Very sleepy or hard to wake needs 999 or A&E.
Is gripe water the same as giving water?
Under six months, WHO advises no additional drink other than breast milk. Gripe water, sugar water and herbal drops are extra drinks too, so ask a doctor before giving any product to a baby.
Is a crying baby in summer a sign of thirst?
Not on its own. A crying baby can be hungry, uncomfortable, too warm or unwell. Feed, check the nappies and the room, and call a doctor if you are worried.
What if my baby has diarrhoea and I want to give water?
Do not give plain water as a fix. Call a doctor, who can advise on a rehydration plan for a baby under six months. Our sachet and syrup guide covers the checks on rehydration packs.
Does a bottle-fed baby need water in hot weather?
The WHO advice on extra drinks is written for breastfeeding. For a bottle-fed baby, ask the doctor before adding any drink, including water.
How much water should a baby have after 6 months?
The safe answer comes from your doctor or health worker, not a home rule. The amount depends on the baby, the season and any illness, so ask at the next visit.
The honest answer on water and babies
Before six months, WHO advises breast milk alone, even in the heat. A restless baby needs a check of the feeds, the nappies and the room, not a sip of water. The signs to act on are the wet nappy count, the mouth, the tears and the soft spot. After six months the question moves to food and cups, and the answer comes from your doctor or health worker.