How to Keep Your Hot Tub Running in Winter

A hot tub can be a perfect way to relax and unwind during winter, but freezing temperatures can put extra strain on your spa. Proper winter maintenance is essential to keep your hot tub running smoothly and prevent costly repairs. Whether you plan to use your hot tub throughout the season or winterize it, knowing the right steps will ensure its longevity.

Why Winter Hot Tub Maintenance Matters

Cold weather can impact your hot tub’s components, including pipes, pumps, and heaters. If water freezes inside the plumbing, it can cause severe damage. Keeping your hot tub running properly prevents:

Frozen or cracked pipes
Malfunctioning heaters and pumps
Increased energy costs due to inefficient heating
Buildup of debris and bacteria in unused water

With the right maintenance, you can enjoy your hot tub all winter without issues.

Essential Steps to Keep Your Hot Tub Running in Winter

1. Keep the Water at a Consistent Temperature

One of the best ways to prevent freezing is to maintain a steady water temperature. Lowering the temperature too much when not in use may save energy, but it increases the risk of freezing.

Set your hot tub to at least 95°F when not in use.
Avoid lowering the temperature significantly between uses.
If extreme cold is expected, increase the temperature slightly to compensate.

2. Invest in a High-Quality Hot Tub Cover

A well-insulated cover helps retain heat and reduces energy consumption. Make sure your cover:

Fits securely to prevent heat loss
Has thick insulation to block out cold air
Is free from cracks, tears, or damage
Is cleaned and treated with a protectant to prevent water absorption

3. Use a Floating Thermal Blanket

A floating thermal blanket sits on the water’s surface and adds an extra layer of insulation. This helps:

Reduce heat loss
Lower energy costs
Minimize evaporation, preventing chemical imbalances

4. Monitor Water Levels Regularly

Water evaporates faster in cold weather, and lower levels can expose the heating elements, leading to damage. Check water levels frequently and top off when necessary.

5. Keep the Jets Running

Running your jets at a low speed keeps water circulating, preventing it from freezing inside pipes. Most modern hot tubs have freeze protection mode, which automatically turns on circulation pumps when temperatures drop too low.

If your hot tub doesn’t have this feature, turn the jets on for a few minutes several times a day.
Ensure all jets are working properly to prevent stagnant water.

6. Check and Clean the Filter

A clogged filter makes your hot tub work harder, leading to higher energy consumption and potential overheating. During winter:

Clean the filter at least once a month.
Replace it if it’s old or excessively dirty.
Keep an extra filter on hand in case of emergency.

7. Protect Your Hot Tub from Power Outages

A power outage in winter can quickly lead to freezing. Prepare by:

Having a backup power source like a generator.
Keeping extra thermal blankets to insulate the water.
Using insulating foam boards to cover vents and gaps.

If the power goes out, do not drain your hot tub. Instead, cover it tightly and add hot water if necessary to maintain warmth.

8. Regularly Check for Ice Formation

Even with proper precautions, ice can form on exposed parts of your hot tub. To prevent damage:

Inspect the pump and pipes for signs of freezing.
If you see ice buildup, use warm towels or a space heater to gently melt it.
Never use boiling water or open flames, as they can damage components.

9. Maintain Proper Water Chemistry

Cold weather can throw off your water’s chemical balance, leading to algae, bacteria, and scale buildup. Keep these levels in check:

pH: 7.2 – 7.6
Alkalinity: 80 – 120 ppm
Sanitizer (Chlorine or Bromine): 3 – 5 ppm
Calcium Hardness: 150 – 250 ppm (to prevent scale and corrosion)

Test your water weekly and adjust chemicals as needed.

10. Plan for Extended Non-Use

If you don’t plan to use your hot tub during winter, it’s best to winterize it properly:

Drain the water completely, including pipes and jets.
Use a shop vacuum to remove any remaining water.
Add non-toxic antifreeze to the plumbing lines.
Secure the cover tightly to prevent debris and moisture from getting in.
Check the tub periodically to ensure no water has entered.

Winterizing is essential if you’ll be away for an extended period and cannot monitor the hot tub.

Additional Tips for Winter Hot Tub Use

Warm towels nearby: Keep towels and robes close to avoid getting cold after soaking.
Check your hot tub steps: Ensure the area around your tub is free from ice to prevent slips.
Stay hydrated: Hot water can cause dehydration faster in cold weather, so drink plenty of fluids.
Limit soak time: Stick to 15-20 minute sessions to avoid overheating.

Enjoying Your Hot Tub All Winter Long

With proper maintenance, your hot tub can provide warmth and relaxation all winter without issue. Keeping the temperature stable, ensuring good insulation, monitoring water chemistry, and protecting against freezing conditions will keep your hot tub running efficiently.

Taking these steps will not only prevent costly repairs but also enhance your overall hot tub experience during the colder months.