Ideal Hot Tub Temperature in Canada: A Seasonal Guide

Finding the ideal hot tub temperature can make a major difference in comfort, energy use, and how long you can safely enjoy each soak.

For most people, the best hot tub temperature falls between 37°C and 40°C, or approximately 98°F to 104°F. However, the right setting depends on the season, your personal preference, and how you plan to use your hot tub.

Canadian weather can range from freezing winter temperatures to hot and humid summer days, so your preferred water temperature may change throughout the year.

If you are a new owner, choosing the right temperature is only one part of looking after your hot tub. Our Beginner Hot Tub Care guide covers the basics of water care, maintenance, and everyday ownership.

What Is the Ideal Hot Tub Temperature?

A temperature of approximately 38°C, or 100°F, is a comfortable starting point for most adults.

From there, you can adjust the water by one degree at a time until you find the temperature that feels best.

Some people prefer a cooler soak at approximately 37°C, while others enjoy temperatures closer to 39°C or 40°C, particularly during the winter.

A hot tub should never be set above 40°C, or 104°F. Water above this temperature can increase the risk of overheating, dizziness, dehydration, and other heat-related concerns.

Best Hot Tub Temperature by Season

The ideal temperature often changes with the weather.

Winter: 39°C to 40°C

During a Canadian winter, many owners prefer their hot tub between 39°C and 40°C, or 102°F and 104°F.

The warmer water creates a comfortable contrast with the cold outdoor air and helps the body warm up quickly.

A temperature of approximately 39°C is often enough for regular use. Increasing it to 40°C may feel better during particularly cold weather, although you may want to keep your soak slightly shorter.

Spring and Fall: 38°C to 39°C

During cooler spring and fall weather, a setting between 38°C and 39°C, or approximately 100°F to 102°F, usually provides a comfortable balance.

The water still feels warm and relaxing without becoming overwhelming as outdoor temperatures begin to rise.

Summer: 35°C to 38°C

During hot Canadian summers, many owners lower their hot tub to between 35°C and 38°C, or approximately 95°F to 100°F.

Lowering the temperature can make the hot tub more refreshing and allows you to stay in the water longer without becoming overheated.

Some owners reduce the temperature even further during heat waves and use their hot tub more like a small relaxation pool.

Best Temperature for Relaxation

For general relaxation, try setting your hot tub between 37°C and 38°C, or approximately 98°F to 100°F.

This range is warm enough to help you unwind without becoming uncomfortable too quickly. It is also a good choice for longer evening soaks or casual time with family and friends.

Best Temperature for Sore Muscles

For sore or tired muscles, a slightly warmer temperature of approximately 38°C to 39°C, or 100°F to 102°F, may feel more soothing.

The combination of warm water and hydrotherapy jets can help you relax after exercise, physical work, or a long day.

Keep your first soak relatively short and pay attention to how your body responds. Warmer water may feel comforting, but it can also lead to dehydration more quickly.

Best Temperature Before Bed

A temperature of approximately 37°C to 38°C, or 98°F to 100°F, is often comfortable for an evening soak.

A short soak before bedtime can help you relax and transition away from the stress of the day.

Whether you use your hot tub for relaxation, recovery, sleep, or time with family, there are many reasons to make it part of your regular routine. Learn more about the Benefits of Regular Hot Tub Use.

Is Hotter Always Better?

A hotter hot tub is not necessarily a better hot tub.

While temperatures close to 40°C can feel enjoyable during cold weather, they can also limit how long you are comfortable in the water.

Higher temperatures may increase the likelihood of:

• Overheating

• Dehydration

• Dizziness

• Fatigue

• Skin irritation

• Increased sanitizer demand

Warmer water can cause chlorine or bromine to be used more quickly, making regular testing and proper water care especially important.

For help maintaining clean and balanced water, read our Essential Guide to Hot Tub Chemicals.

How Long Should You Stay in a Hot Tub?

The appropriate soaking time depends partly on the water temperature.

At approximately 37°C to 38°C, many healthy adults are comfortable for around 20 to 30 minutes.

At 39°C or 40°C, shorter sessions of approximately 10 to 20 minutes may be more appropriate.

Leave the hot tub if you begin to feel dizzy, lightheaded, unusually tired, nauseated, or overheated.

Always keep drinking water nearby, especially during longer sessions or when using the hot tub in warmer weather.

Should You Lower the Temperature Between Uses?

In most cases, it is better to maintain a relatively consistent temperature rather than turning the hot tub down significantly after every use.

A properly insulated hot tub is designed to retain heat. Lowering the temperature slightly during a period of limited use may reduce energy consumption, but allowing the water to cool substantially means the system will need to reheat the entire volume before your next soak.

For regular owners who use their hot tub several times per week, leaving it at the preferred temperature is usually the most convenient approach.

If you will not be using the hot tub for an extended period, lowering the setting by a few degrees may make sense.

The relationship between temperature and operating cost is not always straightforward. Insulation, cabinet construction, covers, pumps, outdoor temperature, and usage habits all affect efficiency. Read The Brutal Truth About Hot Tub Energy Efficiency for a deeper look at heat loss and operating costs.

How Temperature Affects Hot Tub Energy Use

The greater the difference between the water temperature and the outdoor temperature, the harder the hot tub must work to retain its heat.

This is particularly important during winter.

Keeping the water at 40°C in freezing weather will generally require more energy than maintaining it at 38°C. However, reducing the setting by one or two degrees may not produce dramatic savings if the hot tub is poorly insulated.

The quality of the insulation, cover, cabinet, base, plumbing, and overall construction can have a much greater effect on long-term energy use.

Hot Tub Temperature Safety

Always consider the health and comfort of everyone using the hot tub.

Children

Children are more sensitive to heat than adults and may overheat more quickly.

Use a lower water temperature, limit the length of the soak, and ensure children are supervised at all times. Very young children should not use a hot tub unless a qualified healthcare professional has advised that it is safe.

Pregnancy

Pregnant individuals should speak with their healthcare provider before using a hot tub.

Hot water can raise core body temperature, particularly during the early stages of pregnancy.

Medical Conditions

Anyone with heart disease, circulation concerns, blood-pressure conditions, diabetes, or another medical condition should consult a healthcare professional before using a hot tub.

Some medications can also affect the body's ability to regulate heat.

Alcohol

Avoid drinking alcohol before or during a hot tub soak.

Alcohol can increase dehydration, impair judgement, and make it more difficult to recognize the signs of overheating.

Recommended Hot Tub Temperatures at a Glance

What Is the Best Hot Tub Temperature for Canada?

For most Canadian owners, 38°C, or 100°F, is the best everyday starting point.

From there, you can increase the temperature during winter or lower it during summer based on your personal comfort.

The best setting is warm enough to feel relaxing without causing you to become overheated. It should also match how often you use the hot tub and how long you prefer to soak.

Of course, maintaining a comfortable temperature also depends on how well the hot tub is designed to retain heat. Construction quality, insulation, cabinet design, and the cover all matter in Canadian conditions.

Learn more about choosing the Best Hot Tub for Canada, including the features that support reliable year-round use.

Find Your Ideal Hot Tub

The right hot tub should provide comfortable, dependable performance in every Canadian season.

Northern Hot Tubs are designed for year-round enjoyment with straightforward features, durable construction, and an All-Inclusive ownership experience.

Explore our collection of hot tubs and find the model that is right for your home, family, and lifestyle.