Benefits of Drinking Warm Water

Yes, warm water can benefit you if its temperature helps you drink enough, because it supplies the water your body needs for hydration. Evidence that warmth itself provides additional health benefits is limited. Use safe drinking water and let it cool enough to sip comfortably.

What is warm water?

Warm water is plain drinking water heated to a temperature that feels comfortably warm rather than hot. There is no single temperature required to obtain its hydration benefits.

You can heat safe tap or filtered water in a clean kettle or pan. Let it cool if it is too hot, then take a small sip before drinking more. Plain warm water has no sugar or calories.

What are the benefits of drinking warm water?

It helps you stay hydrated

Warm water replaces fluid your body loses through activities such as breathing, urination and sweating. Adequate hydration supports normal circulation, temperature regulation and other everyday body functions.

These benefits come from the water, not necessarily its temperature. If you prefer warm water and find it easier to drink, that preference may help you get enough fluid.

It may feel comfortable to drink

Some people prefer the feel of warm water, particularly in cold weather or when they want a soothing drink. Comfort is a personal benefit, but it is not evidence that warm water treats a sore throat or another medical condition.

You do not need to force yourself to drink warm water if you prefer it cool. The temperature you enjoy is a practical choice as long as the water is safe and does not burn you.

It supports normal body functions, without a special detox effect

Your liver and kidneys do most of the body's detoxification, while the lungs and gut also help eliminate waste. Water supports normal body function, but there is no evidence that drinking it warm flushes out toxins.

Evidence for a special digestive benefit is also limited. In a 2023 randomized trial of 99 surgical patients, those assigned warm water did not have a significantly different time to their first bowel movement from those assigned caffeinated or decaffeinated coffee. The trial did not compare warm water with cool water or establish a treatment for constipation.

What are the risks of drinking warm water?

Water that is too hot can burn your mouth and throat. Let freshly heated water cool before drinking it, and take particular care when serving it to children or anyone who may have difficulty judging its temperature.

Warm water is not automatically safe water. Heating water until it is warm does not reliably remove germs or chemical contaminants. If local authorities advise boiling water, follow their instructions; boiling can kill many germs but does not remove chemical contaminants.

Avoid forcing down large amounts of water quickly. Excessive water intake can dangerously dilute sodium in the blood. Seek urgent medical help for confusion or severe symptoms after drinking an unusually large amount.

See a clinician about persistent constipation, difficulty swallowing or signs of dehydration such as ongoing dizziness or very little urine. Warm water should not replace medical care.

Who might benefit from drinking warm water?

Warm water is an option for most people who enjoy it, including those who find cold water unappealing. It can be one part of your daily fluid intake; there is no need to drink all your water warm.

The National Academies' adequate intake estimates below include water from food and all beverages, not just plain water. They are general guides rather than strict requirements for every person.

Adults	Total water per day	Approximate water from beverages per day
Men, age 19 and older	3.7 L	3.0 L
Women, age 19 and older	2.7 L	2.2 L

Food supplies roughly 20% of total water intake. Needs vary with factors such as heat, exercise and illness. If you have kidney or heart failure, or have been told to limit fluids, follow your clinician's advice rather than using a general intake estimate.

How does warm water compare with tap or filtered water?

Warm water describes temperature; tap and filtered water describe the water's source or treatment. Warm water can be made from either safe tap water or appropriately filtered water.

Choice	What matters
Warm tap water	Use safe cold tap water, then heat it; hot tap water can pick up more metals from plumbing.
Warm filtered water	Start with safe water and maintain the filter as directed. Filtering does not necessarily remove every contaminant.
Cool tap or filtered water	It hydrates too; choose the temperature you prefer.

Warming water does not make it healthier simply by changing its acidity. At 25 °C (77 °F), a pH of 7 is neutral; lower values are acidic and higher values are alkaline. The water ph calculator can help you explore pH values, but pH alone cannot tell you whether water is safe to drink.