Short answer: yes — and a hot tub on a cold Michigan night is one of the best experiences a backyard can offer. Steam rising off the water, snow on the deck, and 104°F under the surface is exactly what hot tubs were designed for.
That said, "safe" depends on doing a few things right. Here's the no-nonsense guide to enjoying a hot tub when it's 20°F outside.
Hot tubs are designed for cold weather
Modern hot tubs are engineered specifically to operate in freezing temperatures. The water stays at 100–104°F regardless of the outside temperature, the equipment is insulated, and the heating system kicks in automatically to maintain the set point.
If anything, cold weather makes the experience better:
- Steam is dramatic and beautiful when the air is cold and dry
- The contrast between cold air and hot water heightens the effect on circulation
- Backyards are quieter and more private in winter
- You burn slightly more calories — your body works harder to maintain core temperature with cold air on exposed skin
The real safety considerations
The risks in winter aren't about the water — they're about everything around it. The good ones to plan for:
1. Slippery surfaces near the tub
Wet feet + cold concrete or wood = ice forming under you within minutes when it's below freezing. Keep an outdoor rubber mat at the tub steps, and consider a covered pathway from your back door if you'll be using the tub frequently.
2. Stepping out of a hot tub into 20° air
The shock isn't dangerous in short bursts, but it is uncomfortable — and that's how people slip, lose their footing, or end up running indoors with bare wet feet. Keep a towel and a robe within arm's reach of the tub, not 15 feet away across an icy patio.
3. Hair freezing
This is real and it's harmless, but worth knowing about. Long wet hair will freeze stiff within a minute in 15°F air. Tie it up, or wear a beanie if you don't want to deal with it.
4. Alcohol + heat + cold
A glass of wine in the tub is fine. Multiple drinks in 102° water in cold air will dehydrate you faster than you expect, and dehydration plus heat plus cold transitions can cause dizziness. Hydrate between sessions, even if you don't feel thirsty.
5. Soak time
20 minutes max per session in winter is a good rule. Step out, cool down, dry off, come back if you want more. Longer continuous soaks combined with the post-soak chill can leave you feeling washed out.
What about the tub itself in freezing weather?
A few tub-specific notes for Michigan winter:
- The cover matters. A well-insulated, properly fitted cover keeps heat in and snow out. Tubsly tubs come with an insulated cover, and our team makes sure it seals properly at delivery. Your tub cover should always be on and locked in place when not in use. For heat retention and for safety.
- Heavy snow is fine, but clear it off. A foot of snow on top of the cover slows heat retention. Brush it off the same way you'd clear a car.
- Don't ever drain a hot tub in subfreezing weather and leave it. If you're renting through Tubsly, you don't have to worry about this — we handle drain and pickup. But for owned tubs, this is the #1 mistake people make.
- Do not ever unplug your tub if outside temps could drop below 40 degrees F. In fact at an electrical usage cost of less than $1 per day there is really no reason to ever unplug your tub at all.
"What if the power goes out?"
Common Michigan winter question. A few realistic scenarios:
- Short outage (under 4 hours): Tub holds heat well. You'll lose 2–5°F. Just let it recover when power returns.
- Multi-day outage in severe cold: This is the only real risk. If a hot tub sits without power for 24+ hours in 10°F weather, water can start to freeze in the plumbing which can damage the tub. In cases of power outage keep the lid locked on the tub and do not use.
If you're renting through Tubsly and we get a major power-outage event during your rental, call us. We can extend your rental dates or come adjust the tub if needed.
Why winter is actually peak hot tub season in Michigan
Most people assume hot tubs are a summer thing. The opposite is true:
- Demand is lower in winter, so availability is better and you can usually book a tub within a week
- The wellness benefits are stronger when there's a real cold-to-hot contrast — that's the original Nordic spa tradition
- Birthdays, anniversaries, and snow-day weekends are all great occasions for a tub on the back patio
- You appreciate it more. A 75° summer evening in a hot tub is nice. A 25° January night in a hot tub is unforgettable.
Ready to try a winter rental?
Tubsly delivers across Southeast Michigan in all weather short of unsafe driving conditions. Winter packages are typically easier to schedule and just as warm as summer ones.
Book a winter rental or check our service area to confirm we cover your address.