What Temperature Should a Hot Tub Be?

The best temperature for a hot tub is usually between 37°C and 40°C. This range is comfortable and safe for most people. It helps with relaxation, too. Getting the temperature right is key, whether you're relaxing in the water after a long day or soaking with friends on the weekend.

Why a Hot Tub Temperature Matters

Your hot tub's temperature isn't just about comfort; it's also about well-being. Too cool, and it won't be relaxing. It's too hot and can become dangerous.

Staying within the recommended 37°C to 40°C range helps avoid overheating while still enjoying the soothing benefits.

It’s worth noting that 40°c is the maximum legal temperature for hot tubs in the UK. Any higher and you risk health concerns such as dizziness, dehydration, or worse. For most adults, 38°c to 39°c tends to be the sweet spot—warm enough to unwind but still safe for a 15–to 30–minute soak.

Adjusting for Who’s Using It

Hot tubs aren’t a one-temperature-fits-all setup. You’ll want to tweak the setting depending on who’s getting in.

Children should only use a hot tub with the temperature lowered to a safe temp, and even then, they shouldn’t stay in for long.

Older adults or those with health conditions may also prefer cooler water, around 37°c, to avoid straining their body.

During pregnancy, it’s best to consult a medical professional before using a hot tub at all, especially if the water is warmer than 37.5°C.

Seasonal Tweaks

Adjust your hot tub's temperature according to the time of year. In the summer, a lower setting around 36°C—can feel more refreshing without the sweltering heat.

Here's the thing...

Come winter, most people prefer setting it closer to 39°C for a truly warming experience under the stars.

The Wellness Co. often recommends tailoring your hot tub habits to the seasons. It’s not just about getting the most out of your soak—it’s also about energy efficiency and wear on your system.

Saving Energy Without Compromising Comfort

Keeping your hot tub at a slightly lower temperature when it’s not in use can help reduce energy use. Some owners like to keep it at 36°C during the week, then raise it when they know they'll be using it. It can take a few hours to heat back up to 39°C, so planning ahead helps.

The Wellness Co. also suggests using a high-quality cover to keep in the warmth and cut down on running costs. It’s a simple tip, but one that makes a noticeable difference over time.

How to Check and Control the Temperature?

Modern hot tubs come with digital controls that make temperature adjustments easy. If yours doesn’t display the temperature clearly, it’s a good idea to invest in a reliable hot tub thermometer. Regularly checking the reading ensures you're soaking in safe and comfortable water.

Don’t forget to give your hot tub time to reach the new temperature after you make adjustments. It usually takes around 2 to 4 hours depending on your model, how insulated it is, and the weather.

Final Thoughts

So, what temperature should your hot tub be? In short:

37°C to 40°C for most adults

Slightly lower for children or if you have health concerns

Adjust based on season and personal preference

Hot tubs are all about relaxation and wellbeing, and the right temperature plays a big part in that. No matter if it’s a cold winter night or a sunny afternoon, setting your hot tub right helps you enjoy every soak.

Got a question or need help choosing the right settings for your model? The Wellness Co. is always here to help with expert advice and support.