Yes, you can use a hot tub in the rain — and in the UK, you probably should get comfortable with the idea. Light to moderate rain poses no significant risk when your setup is properly installed. The one situation where you must get out immediately is thunder or lightning.
Rain is basically the UK's default weather setting. If we only used our hot tubs on warm, cloudless evenings, most of us would get about three sessions a year and spend the rest of the time writing strongly worded letters to the Met Office. The good news is that a bit of drizzle — or even a proper downpour — doesn't mean you have to abandon ship. What matters is understanding which weather conditions are genuinely safe, and which ones aren't.
This guide covers everything you need to know: when rain is fine, what precautions to take, and the one scenario where there's absolutely no debate — thunderstorms.
Can you use a hot tub in the rain?
Generally, yes. Rain itself doesn't create a direct safety hazard when you're already submerged in water. In fact, a lot of people find it genuinely lovely — there's something quietly dramatic about sitting in a steaming tub while rain patters around you. Very British. Very peaceful. Check our blog to see how hot tubs work.
That said, there's a difference between a gentle shower and the kind of sideways rain that removes garden furniture. Heavy rain combined with strong wind changes the experience and the risk profile. It can make surrounding decking and steps significantly more slippery, reduce visibility, and make it harder to monitor changing weather conditions. Light to moderate rain? Generally fine. A full horizontal gale? Probably not your finest hour.
The setup of your hot tub also matters. A well-installed, wood-fired hot tub with sound outdoor electrics (if applicable) and a non-slip surround is in a much better position than something thrown together with extension leads and a prayer.
Is it safe to use a hot tub in the rain?
The question of whether it's safe to use a hot tub in the rain comes down to a few key areas — and most of them have straightforward fixes.
Electrical safety
This is the most important one. Any electrical components — control panels, lighting, speakers, pumps — need to be outdoor-rated and properly installed. Extension leads used outdoors are a significant hazard, and you should never use one to power hot tub equipment. Outdoor sockets should be protected by an RCD (residual current device), which cuts the power if something goes wrong. If you're not certain about your setup, get a qualified electrician to check it before using the tub in wet conditions.
Slips and trips
Wet decking, wet tiles, and wet steps are where most hot tub injuries actually happen — not in the water. Non-slip matting near entry and exit points makes a real difference, as does having a solid handrail to hold onto when you're climbing out.
Water quality
Rain dilutes your water slightly. Over the course of an occasional shower it's minimal, but heavy or sustained rainfall — especially with the lid off for long periods — means rainwater can dilute chemicals and throw off your water chemistry; acid rain can also lower pH and alkalinity levels. Test more frequently during rainy spells and rebalance as needed after heavy rain.
Wind chill when you get out
The water's warm. The air isn't. In British conditions, that contrast can feel brutal when you haul yourself out mid-January. Keep a warm robe and towels close by, ideally within arm's reach of the tub, so you're not sprinting across a cold patio.
Hot tub in rain precautions: do this before you get in
A quick run-through before you lower yourself into the water goes a long way. Safe hot tub use in wet weather starts with a quick safety and maintenance check. Here's what we'd recommend:
- Check the weather properly. Not just a glance at the sky — open an app and look at the next couple of hours. If there's any thunder forecast, plan accordingly.
- Keep towels and a robe close. Warm, dry, and ideally pre-tumble-dried. Cold air hits fast when you step out.
- Use non-slip footwear. Wear water shoes or rubber sandals between the house and the tub. Wet decking is unforgiving.
- Put a non-slip mat on the steps. Worth doing regardless of the weather, honestly.
- Use shatterproof cups. Wet hands and glass don't mix well. There are plenty of good options — insulated tumblers, stainless steel, whatever works.
- Keep electrics away from splash zones. No extension leads, no improvised setups. If something's plugged in outdoors, make sure it's properly rated for outdoor use.
- Confirm your RCD protection is in place. If you've got electric components associated with your tub, this is non-negotiable.
Hot tub in the rain lightning safety (the bit we won't joke about)
Water and lightning are not a combination to be casual about. If you can hear thunder, lightning is close enough to be a genuine risk — and water conducts electricity extremely efficiently. You don't need a direct strike on your tub for it to be dangerous; lightning can travel through ground currents, nearby structures, or connected electrical systems.
The rule here is simple: if you hear thunder, get out. Don't wait to see if it gets closer. Don't finish your drink first. Get out.
When you do exit, avoid sheltering immediately next to the tub or under metal structures, which can act as conductors. Move indoors — a properly constructed building is the right place to be. Covered patios, gazebos and pergolas don't count as safe shelter during a lightning storm, even if they keep the rain off.
Can you use a hot tub during a thunderstorm?
No. This is the one weather scenario where the answer is completely unambiguous.
If a thunderstorm rolls in or lightning strikes nearby while you're already in the tub, the steps are:
- Get out immediately
- Dry off quickly and move indoors
- Avoid touching metal outdoor fittings or rails as you go
- Stay inside until the storm has fully passed — not just until it quietens briefly
A useful rule of thumb: wait at least 30 minutes after the last clap of thunder before heading back outside. Storms can linger and resurface, so patience is the right call here.
Does rain affect a wood-fired hot tub differently?
Wood-fired hot tubs are built for outdoor living — ours certainly are. Rain is part of the deal, and the tubs themselves handle it well. There are a couple of practical things worth keeping in mind, though.
Keep your firewood dry and properly stored under cover. Wet wood is harder to light, burns less efficiently, and produces more smoke than it should. A simple log store with a roof makes a big difference.
Think about wind direction when you're lighting and managing the fire. Strong gusts can affect how the stove draws and make keeping the fire going more of an effort. Positioning matters.
Also worth noting: the stove and chimney area get extremely hot, and wet conditions don't change that. Be mindful when feeding the fire, especially if you've been in the water and your hands are damp.
What about hot tub covers, gazebos, and shelter?
Adding a cover or shelter over your hot tub area improves the experience in wet weather significantly — less rain in your face, less wind chill, easier towel management. A gazebo or pergola can make the whole thing feel like a proper outdoor retreat rather than an endurance exercise.
A few things to keep in mind:
- Ventilation matters, especially with wood-fired setups. Don't create a fully enclosed space around a wood-burning stove — you need airflow to prevent fumes building up.
- Make sure any canopy is properly secured. In wind, a poorly anchored structure becomes a hazard. If you're investing in a gazebo, invest in one that's built to handle UK conditions.
- Check the structure regularly. Joints loosen, fixings corrode. A quick check before each use during stormy seasons takes about two minutes.
Frequently asked questions
Will rain cool the water down?
Not significantly. The volume of water in a hot tub is large enough that light rainfall has minimal effect on temperature. Heavy, sustained rain over a long session might drop it a degree or two at most.
Can I leave the lid off in heavy rain?
It's not ideal. Heavy rain with the lid off for extended periods can dilute your water chemistry and raise the water level. If you're not using the tub, keep the cover on.
Is it safe to use a hot tub at night in the rain?
Generally yes, with the same precautions as daytime use. The key addition at night is visibility — make sure you can see the tub, your exit route, and the surrounding area clearly enough to move safely. Good outdoor lighting helps.
What if it's raining but warm and calm?
That's a perfectly good evening in the hot tub. Warm summer rain with no thunder in the forecast is exactly the kind of weather a wood-fired hot tub was made for.
Use your hot tub year-round, even in the wet weather
A little rain shouldn't put you off. With the right setup, sensible precautions, and a firm rule about thunderstorms, a wood-fired hot tub becomes something you use year-round — not just during the two weeks of British summer that actually deliver.
If you're thinking about adding one to your garden, explore our wood fired hot tubs and find the right fit for your space.