Winterizing an inflatable spa: store it rather than risk frost
An inflatable spa and frost do not mix: water freezing in the structure and the pump can destroy them. For most uses, the right strategy is not to leave it out, but to drain it and store it dry.
In short
Unlike an in-ground pool, an inflatable spa copes badly with winter outdoors: frost can crack the structure and damage the motor unit. If you do not use it in winter, the safest solution is to drain it fully, clean it, dry it, then fold and store it away from frost. If you want to use it, you must instead keep it frost-free at all times.
The usual case: drain and store
For an inflatable spa not used in winter, drain it fully, clean the shell and filters, dry it carefully (residual moisture can freeze or grow mould), then fold the structure back into its original packaging, stored in a frost-free space. This is what best preserves its lifespan.
If you use it in winter
Winter use is possible, but it means never letting the water freeze: the heating and filtration must run permanently, and the spa must be well covered and insulated. It is more energy-hungry and more demanding; during a power cut in hard frost, the freezing risk is real.
What to do, step by step
Decide: store or keep running
No winter use: drain and store. Winter use: keep it frost-free permanently.
Drain it fully
Empty all the water, including from the circuits, so none is left that could freeze.
Clean and dry
Clean the shell and filters, then dry carefully before folding the structure.
Store away from frost
Fold the spa back into its packaging and store it in a space that does not freeze.
Frequently asked questions
Can you leave an inflatable spa outside in winter?
Not advisable if it is not used: frost can crack the structure and damage the pump. Better to drain it and store it dry.
Do I really have to drain it completely?
Yes: any residual water, including in the circuits, can freeze and cause damage. Careful drying also prevents mould during storage.
And if I want to use it in winter?
It is possible, but you must keep it frost-free at all times: continuous heating and filtration, good insulation. A power cut in hard frost remains a risk.