What is the best temperature for outdoor hot bathtubs?

Outdoor hot bathtubs have become a common facility in many people's homes because of their relaxing effects on the body and mind, and soothing muscles and joints. However, many users have questions about how to set the water temperature of outdoor hot bathtubs: What is the best temperature? Is it the hotter the better? Are there any safety hazards?

This article will analyze the best temperature for outdoor hot bathtubs from multiple angles to help you enjoy a comfortable bath while ensuring your health and safety.

What is the best temperature for outdoor hot bathtubs?

The water temperature of most outdoor hot bathtubs can be adjusted according to the needs of users, and the general temperature range is between 37°C and 40°C (98°F to 104°F). But it should be noted that this does not mean that everyone is suitable for bathing in this temperature range. The appropriate water temperature may be different for different people, different physiques, and different environmental conditions.

According to the US Consumer Product Safety Commission (CPSC), the maximum water temperature in an outdoor hot tub should not exceed 40°C (104°F) because water above this temperature may have adverse effects on the human body, especially for the elderly, pregnant women or people with health problems.

37°C (98°F)

This is close to the normal body temperature and is suitable for long baths. This temperature is a good choice if you want to stay in the hot tub for a long time without getting too hot or uncomfortable. Bathing at this temperature is effective for relaxing the body and mind without making your body uncomfortable due to overheating.

38°C (100°F) to 39°C (102°F)

This temperature range is usually the most comfortable temperature for most people when using an outdoor hot tub. It is slightly higher than body temperature, which can help speed up blood circulation and relax muscles and joints, especially after a hard day's work. This temperature can bring deep relaxation and relief.

40°C (104°F)

This is the maximum water temperature recommended by US safety standards for outdoor hot tubs. While many people like to set the water temperature to this higher level to enjoy the deep warmth, prolonged exposure to high temperatures can be risky. It is not advisable to stay in a hot bath for too long, and it is generally recommended not to exceed 15-30 minutes, especially when the hot bathtub water temperature reaches 40°C (104°F), to avoid symptoms such as dizziness and dehydration due to overheating.

What factors affect the optimal temperature of an outdoor hot bathtub?

Although 37°C to 40°C is a common temperature range, each person may feel different about the hot bathtub water temperature, and the optimal outdoor hot bathtub temperature depends on several factors. Understanding these factors can help you better adjust the water temperature to ensure that each bath is a balance between safety and comfort.

Personal physical fitness and health conditions

Different people have different physical fitness and health conditions, so the appropriate hot bathtub water temperature will also vary. For healthy adults, soaking in hot water between 38°C and 40°C is safe and comfortable. However, for people with chronic diseases such as heart disease, high blood pressure, and diabetes, the excessively high water temperature of the hot bathtub may increase the burden on the body, causing blood pressure fluctuations, increased heart rate, and even fainting. Therefore, for people with health problems, it is recommended to choose a lower water temperature under the guidance of a doctor to avoid overheating.

Bath duration

The duration of the bath also directly affects the choice of the optimal temperature. If you plan to relax in an outdoor hot bathtub for a long time, it is safer and more comfortable to choose a lower temperature (such as 37°C to 38°C). Prolonged soaking in hot water may cause the body temperature to rise too quickly, causing dehydration, dizziness, or collapse.

If you only plan to take a short bath, a hot bathtub water temperature of 40°C can provide you with a deeper relaxation and thermal therapy effect, but even so, do not let the bathing time exceed 20-30 minutes to avoid health problems caused by high temperature.

Ambient temperature

The ambient temperature outdoors or indoors is also an important factor affecting the temperature of the outdoor hot bathtub. In the cold winter, people usually like to adjust the water temperature higher to fight against the cold temperature; in the hot summer, many people tend to adjust the water temperature lower to maintain the comfort of bathing.

Especially when using an outdoor hot bathtub outdoors, the impact of ambient temperature on water temperature is more obvious. The cold external environment will accelerate the loss of water temperature, causing the water temperature in the hot bathtub to drop rapidly. Therefore, when bathing outdoors in winter, the water temperature can be appropriately increased. In the hot summer, the water temperature should not be adjusted too high to avoid overheating.

Bathing purpose

Is your main purpose of bathing to relax, relieve muscle pain, or for rehabilitation treatment? The required water temperature is different for different purposes. If you are just relaxing, then the temperature of the hot bathtub of 37°C to 38°C is enough to provide a comfortable experience. If you are relieving muscle soreness or performing heat therapy, you can choose a slightly higher temperature (such as 39°C to 40°C), which can more effectively promote blood circulation and accelerate muscle recovery.

What are the dangers of too high water temperature in the outdoor hot bathtub?

Although many people believe that the hotter the water in a hot bathtub, the more relaxing it is, the higher the water temperature, the more potentially harmful it can be. The risk increases significantly when the water temperature exceeds 40°C (104°F).

Dehydration and exhaustion

When exposed to heat, the body regulates its temperature by sweating. If you soak in overheated water for a long time, your body loses a lot of water, which can lead to dehydration. Dehydration can cause symptoms such as headaches, dizziness, and nausea, and in severe cases, can lead to exhaustion or even coma. Therefore, it is recommended to stay hydrated during bathing, especially when bathing in high temperatures.

Increased burden on the heart

The high temperatures in an outdoor hot bathtub can cause blood vessels to dilate and the heart rate to increase, which can put a greater burden on the heart. This is particularly dangerous for those with heart disease or other cardiovascular problems. Studies have shown that prolonged exposure to high temperatures may increase the risk of heart attack. Therefore, people with heart disease should avoid soaking in hot bathtubs that are too hot.

Dizziness and nausea

When the body is exposed to hot water for a long time, especially without adequate rest and hydration, it can cause dizziness and nausea. This is due to the drop in blood pressure and imbalance of body water caused by high temperature. To avoid this, it is recommended to control the bathing time within a reasonable range and avoid the hot bathtub water temperature being too high.

Special risks for pregnant women

Pregnant women need to be particularly careful when using outdoor hot bathtubs. High temperature water baths may cause pregnant women to have too high body temperatures, which may affect the health of the fetus. Excessive body temperature may cause fetal development problems and even increase the risk of miscarriage. Therefore, pregnant women should try to keep the water temperature below 37°C when using outdoor hot bathtubs and avoid soaking for a long time.

How to set and maintain the optimal water temperature?

Setting and maintaining the optimal temperature of an outdoor hot bathtub is not complicated, but there are some key points to pay attention to, especially when using it in different seasons or under different circumstances.

Correctly adjust the thermostat

Most modern outdoor hot bathtubs are equipped with an automatic thermostat control system, and users can easily set the desired water temperature through the thermostat. It is recommended to check the thermostat readings regularly to ensure that the water temperature in the hot bathtub is maintained within a safe range.

Regularly maintain the heating system of the hot bathtub

The heating system of the outdoor hot bathtub is a key part of maintaining the water temperature. Regularly checking and maintaining the heater, filter and pump to ensure the normal operation of the equipment can not only extend the life of the equipment, but also ensure a stable and uniform water temperature.

Use an outdoor hot bathtub cover

Using an outdoor hot bathtub cover can not only prevent debris from entering the hot bathtub, but also effectively reduce heat loss, especially in winter. A good quality outdoor hot bathtub cover can help maintain water temperature and reduce the burden on the heating system.

Monitor water temperature and adjust it in time

Ambient temperature changes and an increase or decrease in the number of users will affect the water temperature of the outdoor hot bathtub. Therefore, it is recommended that you measure the water temperature before use and adjust it according to the situation. For example, the water temperature can be appropriately lowered in summer, and slightly increased in winter to maintain a comfortable bathing experience.

Can I request samples before placing a large order with Lovia Spa?

Yes! Lovia Spa understands the importance of product evaluation before bulk purchasing. We offer sample orders for our outdoor hot bathtubs, and swim spas at affordable sample prices. If you proceed with a large bulk order after reviewing the sample, we will deduct the sample cost from your final bulk purchase. Additionally, we offer discounted bulk prices, customized quotes, and exclusive promotional offers for large orders. Contact us now to request your sample and receive a free bulk quote.