Should I Empty My Hot Tub In Winter?

When It Makes Sense

• Good fit: You live in a region where temperatures regularly drop below freezing for extended periods and your hot tub has a traditional vinyl liner that is prone to cracking when water freezes.
• Good fit: The hot tub will not be used at all during the winter months, and you have the time and equipment (pump, hose, and proper storage space) to fully drain and dry the system.

When You Should Avoid It

• Warning sign: Your tub features a freeze‑proof insulated cabinet, internal heating coils, or a built‑in freeze protection system that is designed to operate safely under sub‑zero conditions.
• Warning sign: You lack a convenient way to store the drained water or cannot safely disconnect and refill the tub without professional assistance.

Pros and Cons

Pros

• Draining eliminates the risk of water expanding as it freezes, which can cause liner ruptures, cracked pipes, or damaged jets.
• Without standing water, you reduce the likelihood of algae growth or chemical imbalances that could require intensive cleaning later.

Cons

• The process of draining, cleaning, and refilling can be labor‑intensive and may require professional help to avoid voiding warranties.
• If the tub is not properly dried, moisture trapped in components can lead to rust or mold, potentially causing long‑term damage.

Decision Checklist

• Will the water in my tub likely freeze solid based on my local winter temperature trends?
• Does my hot tub model have built‑in freeze protection that the manufacturer recommends leaving water in?
• Do I have the tools, time, and safe storage space to fully drain, clean, and later refill the tub?

Alternatives to Consider

If emptying isn’t practical, you can keep the hot tub filled but take preventative steps: maintain the water at a minimum temperature (usually 50‑55 °F) using the tub’s built‑in thermostat, add antifreeze solutions specifically designed for spas, or cover the tub with an insulated, weather‑resistant cover to reduce heat loss.

Final Recommendation

For most owners in cold climates with non‑freeze‑proof hot tubs that will sit idle all winter, draining and storing the tub is the safest route. However, if your model includes freeze‑protection features, you can keep it filled and rely on temperature control and a quality cover. Evaluate your climate, equipment specifications, and willingness to perform the work, and consult the manufacturer’s guidelines or a qualified spa technician before making a final decision.