The Ideal Temperature for a Spa: A Guide for Every Season

March 11, 2025

The pleasure of a spa comes not only from the relaxation it provides but also from setting the perfect water temperature. However, this ideal setting varies depending on the season, weather conditions, and personal preferences. What temperature should you set your spa for optimal comfort year-round? Here’s a practical guide to adjusting your spa’s temperature for every season to maximize your well-being.

Spring: Enjoying the Mild Weather (32-36°C / 90-97°F)

As temperatures start to rise, your spa becomes the perfect way to unwind after an active day.

Ideal range: 32-36°C (90-97°F) – warm enough for relaxation but not too hot for the changing weather.
If using your spa during the day, lower the temperature slightly to avoid overheating in the spring sun.
Use an insulating cover to prevent temperature fluctuations between day and night.

Summer: Refreshing and Relaxing (26-32°C / 79-90°F)

In the middle of summer, your spa can become a cooling oasis rather than a hot bath.

Set your spa between 26-32°C (79-90°F) for a refreshing yet comfortable soak.
Leave the cover open in the evening to naturally cool the water.
If your spa is exposed to sunlight, place it in the shade to avoid overheating.

Tip: A spa that’s too hot in summer can be uncomfortable. Lower the temperature gradually and enjoy your spa like a heated pool!

Autumn: Transitioning Back to Warmth (34-38°C / 93-100°F)

As nights get cooler, your spa becomes a warm retreat.

Set your spa between 34-38°C (93-100°F) to counteract the cooler air temperatures.
Run filtration during colder hours to minimize heat loss and optimize energy efficiency.
Check your spa’s insulation and ensure your thermal cover is in good condition.

Tip: Autumn is the perfect time to maintain your spa and prepare for winter.

Winter: A Hot Bath in the Cold (36-40°C / 97-104°F)

Soaking in a spa while the air is freezing outside is a unique and incredibly relaxing experience.

Ideal temperature: 36-40°C (97-104°F) to fully enjoy your spa despite the cold.
Use a high-quality thermal cover to prevent heat loss and reduce energy consumption.
Regularly check the water level to avoid running your filtration system dry.

Caution: Avoid staying too long in a spa over 38°C (100°F) to prevent overheating, especially in winter!

General Tips for Year-Round Temperature Adjustments

Adjust the temperature based on usage: relaxation, muscle therapy, socializing—each activity has its ideal setting.
Consider personal preferences: some people prefer hotter water, while others enjoy a cooler soak.
Avoid sudden temperature changes: raising or lowering the temperature too quickly can strain your heating system and increase energy consumption.

Conclusion

There’s no single perfect temperature for a spa—it depends on the season and your personal comfort. By adjusting your spa to outdoor temperatures and your needs, you can optimize your experience while controlling energy consumption. So, what’s your ideal spa temperature tonight?