Using a Hot Tub in Freezing Weather: A UK Winter Guide

A steaming hot tub on a frosty evening is half the appeal. But freezing weather is also when inflatable hot tubs are most likely to be damaged or to run up big electricity bills. This guide explains how to keep using yours safely through a UK cold snap.

The short answer

You can usually keep using an inflatable hot tub in winter if you keep it running and heated, keep the lid on and strapped down, and check the manual's minimum operating temperature. Never leave a filled tub switched off in freezing weather. Ice in the pump, heater or pipes can crack them.

Check your model's cold-weather rating

Manufacturers set a minimum outdoor temperature for using and running their inflatable tubs, and some models add freeze protection. On several Lay-Z-Spa models, this is called FreezeShield. From our shortlist, the Paris Luxe, Miami, Helsinki and Cancun all list FreezeShield. Freeze protection is designed to switch the heater and pump on automatically when the water gets too cold. Check the exact temperature limits in your manual, because they vary by model.

Cold-weather checklist

1. Keep it on. Leave the filter and heater running so water is always moving and warm.
2. Lid on, straps done. The lid is your main defence against heat loss and ice.
3. Lower the set temperature, but do not switch off. Dropping a few degrees between uses can save energy. Heating from very cold takes many hours.
4. Insulate underneath and around. A ground mat, a thermal lid cap and wind shelter all help. See hot tub accessories worth buying.
5. Protect the pump. Some owners shelter the pump unit with a ventilated cover. Never block vents or cover electrics with anything that traps moisture.
6. Watch for power cuts. If the power goes off in freezing weather, restore it quickly. If it will be off for a long time, consider draining.

What it costs in winter

Running costs rise sharply in cold weather, because the heater has to replace more lost heat. That is especially true in wind and on frosty nights. Model a winter month with the hot tub running cost calculator at 26.32p per kWh, and read how much a hot tub costs to run. If winter use will be rare, draining and packing away may be cheaper. See should you leave a hot tub empty over winter?

Safety in cold weather

• Icy steps and patios are a real slip risk. Grit the path and use non-slip steps.
• Do not soak for too long. Moving between hot water and freezing air is hard on the body. Keep a towel and robe within reach.
• Never drink alcohol heavily in a hot tub, and keep soaks short for children.

If ice has formed

Do not chip ice off the lid or liner with tools. You can puncture it. Do not pour boiling water over frozen connectors. Thaw gently, check for cracks or leaks before restarting the pump, and contact the manufacturer if anything looks damaged.

How we worked this out: this guide is research-led. It draws on manufacturers' published specifications and instructions plus owner feedback, not our own hands-on testing. Prices are typical prices we last recorded and they change often. Always follow your hot tub's manual.

Frequently asked questions

Can you use an inflatable hot tub in freezing weather?

Usually yes, if it stays switched on and heated with the lid secured, and the outdoor temperature is within the manufacturer's stated range. Check your manual.

Will my inflatable hot tub freeze?

It can if the power is off or the pump stops in sub-zero temperatures. Freeze-protection features help, but only while the tub has power.

Should I turn my hot tub off in winter?

Not while it is full and the weather is freezing. Either keep it running or drain and store it properly.

How much more does a hot tub cost to run in winter?

Considerably more than in summer, because of heat loss. The exact amount depends on your model, lid and shelter. Use our running cost calculator to estimate it.