The temperature at which a hot tub freezes depends on several factors, including the ambient temperature, insulation of the hot tub, and whether it’s running or not. Generally, hot tubs are designed to operate in temperatures well below freezing.
Most hot tubs are equipped with freeze protection features that activate the heater and circulation pump to prevent freezing when the temperature drops close to freezing. Typically, these features engage when the outdoor temperature approaches 32°F (0°C) or slightly above.
However, it’s important to note that prolonged exposure to temperatures near freezing or below can still pose a risk of freezing, especially if the hot tub is not properly insulated, maintained, or if the freeze protection system malfunctions.
To ensure your hot tub doesn’t freeze, it’s best to keep it running during cold weather, maintain proper insulation, use a high-quality cover, and follow any specific winterization procedures recommended by the manufacturer. If you live in an area where temperatures regularly drop below freezing, it’s essential to take extra precautions to protect your hot tub from freezing and potential damage.