A hot tub can be one of the most relaxing places to spend an evening, but that changes quickly when a thunderstorm moves into the area. If you can hear thunder or see lightning, the safest choice is simple: get out of the hot tub and go indoors.
The National Weather Service states that there is no safe place outside when thunderstorms are nearby. If you can hear thunder, lightning is close enough to strike, even if the storm appears to be several miles away or it is not raining directly over your home. The recommendation is to move to a substantial enclosed building or a hard-topped vehicle and remain there for at least 30 minutes after the last sound of thunder. :contentReference[oaicite:0]{index=0}
This is especially important around pools and hot tubs because water, wet surfaces, plumbing, electrical equipment and metal components can all increase the consequences of an electrical event.
Is It Safe To Sit In A Hot Tub During A Thunderstorm?
No. You should not remain in a hot tub, swimming pool or other body of water when a thunderstorm is in the area.
The National Weather Service specifically advises people to get out of pools and other bodies of water when lightning is nearby. Lightning can strike several miles away from the area where rain is actually falling, so waiting until the storm is directly overhead is not a safe strategy. :contentReference[oaicite:1]{index=1}
A good rule to remember is:
If you can hear thunder, get out of the water and go indoors.
What If The Hot Tub Is Under A Covered Patio?
A roof over the spa does not necessarily make it safe.
Open-sided structures such as covered patios, gazebos, pavilions, carports and similar shelters are not considered adequate lightning protection. The National Weather Service recommends moving into a substantial enclosed building or, if one is not available, an enclosed hard-topped vehicle with the windows closed. :contentReference[oaicite:2]{index=2}
That means a hot tub beneath a pergola, awning or patio roof should still be vacated when thunder or lightning is present.
What If It Is Only Raining?
Rain itself does not automatically mean lightning is present, but rain can introduce other safety concerns around a spa.
Wet decks, steps and surrounding surfaces can become slippery. Heavy rain can also affect water chemistry by adding untreated water to the spa, particularly if the cover is left open for an extended period.
The important distinction is whether the rain is associated with a thunderstorm.
If you hear thunder or see lightning, get out of the water immediately. Do not wait for heavy rain to begin. Lightning can strike well outside the main rain area of a storm. :contentReference[oaicite:3]{index=3}
Why Are Hot Tubs Particularly Concerning During Electrical Storms?
A modern hot tub contains numerous electrical components operating very close to water, including:
- Circulation pumps
- Jet pumps
- Electric heaters
- Control systems
- Lighting
- Ozone or sanitation equipment
- Blowers
- Electrical wiring and connections
Properly installed hot tubs include electrical protections designed to reduce shock hazards, but those protections are not a reason to remain in the water during a lightning storm.
The U.S. Consumer Product Safety Commission warns that wet skin and wet surfaces can greatly increase the risk of serious electrical shock when electricity is present around pools, spas and hot tubs. :contentReference[oaicite:4]{index=4}
Does A GFCI Make It Safe To Use The Hot Tub During Lightning?
No.
A Ground Fault Circuit Interrupter, or GFCI, is an extremely important electrical safety device, but it is not lightning protection.
GFCIs are designed to detect certain electrical current imbalances and disconnect power rapidly. CPSC recommends GFCI protection for electrical equipment associated with pools, hot tubs and spas and recommends that permanently installed GFCIs be tested regularly. :contentReference[oaicite:5]{index=5}
Even with a properly functioning GFCI, however, you should leave the hot tub when a thunderstorm approaches.
Can Lightning Strike A Hot Tub?
Lightning does not need to strike the hot tub directly to create a dangerous situation.
A strike can occur nearby and electrical energy may travel through conductive paths including electrical systems, plumbing, wiring or the ground. Lightning can also strike well away from the visible center of a thunderstorm. NOAA notes that lightning can occur more than 10 miles from the area of rainfall. :contentReference[oaicite:6]{index=6}
This is why trying to judge whether a storm is "far enough away" simply by looking at the sky is unreliable.
When Should You Get Out Of The Hot Tub?
You should leave the spa as soon as you hear thunder or see lightning.
Do not wait until:
- The rain becomes heavy
- The storm is directly overhead
- Lightning appears close
- The power flickers
- The weather becomes severe
The first sound of thunder is enough reason to get out.
How Long Should You Wait Before Getting Back In?
Wait at least 30 minutes after the last sound of thunder before returning to the hot tub or other outdoor activity.
The National Weather Service recommends this 30-minute waiting period because lightning can still occur after the main portion of the storm appears to have passed. :contentReference[oaicite:7]{index=7}
If you hear thunder again during that waiting period, restart the 30-minute clock.
What Should You Do With The Hot Tub When A Storm Is Approaching?
There is usually no need to perform complicated shutdown procedures simply because a thunderstorm is approaching.
The priority should be getting everyone safely out of the water and indoors.
If conditions allow and you can do so without delaying your move to shelter:
- Get everyone out of the hot tub.
- Close and secure the spa cover.
- Remove loose objects from the surrounding area if high winds are expected.
- Move indoors to a substantial enclosed building.
Do not remain outside trying to protect equipment once lightning is nearby.
Should You Turn Off The Hot Tub At The Breaker?
In most ordinary thunderstorms, there is no reason to rush outside during lightning to access the spa disconnect or circuit breaker.
If you are already safely inside, remain inside.
If a severe storm is forecast well in advance and you have concerns about the electrical system or surge protection, you may want to consult a qualified electrician about appropriate protection for your particular installation.
Never attempt electrical work on a wet spa or electrical panel during a storm.
What If You Feel A Tingling Sensation In The Water?
A tingling or shocking sensation in a pool or hot tub should always be taken seriously, whether or not a thunderstorm is present.
CPSC lists tingling, muscle cramps, difficulty moving and unusual swimmer behavior among possible warning signs of electrical shock in pools and spas. :contentReference[oaicite:8]{index=8}
If you believe electricity may be present:
- Get out of the water if you can do so safely.
- Avoid using a metal ladder if another safe exit is available.
- Do not reach into the water to rescue someone while electrical power may still be present.
- Turn off electrical power if it can be done safely.
- Call 911 in an emergency.
- Have the spa inspected by a qualified electrician before anyone uses it again.
CPSC specifically warns that a rescuer can also become a victim if electrical power has not been disconnected. :contentReference[oaicite:9]{index=9}
What If Lightning Strikes Near The House Or Hot Tub?
If you suspect a nearby lightning strike affected your property, inspect the spa carefully before returning it to normal use.
Watch for:
- A tripped breaker or GFCI
- A blank or malfunctioning control panel
- Error codes that were not present before the storm
- Pumps that no longer operate normally
- A heater that no longer works
- Damaged or flickering spa lighting
- Burned electrical odors
- Visible wiring or circuit board damage
- Repeated breaker trips after power is restored
If you smell burning, see damaged wiring or experience repeated electrical faults, leave the spa off until the electrical system has been inspected.
Are Indoor Hot Tubs Safe During A Thunderstorm?
An indoor hot tub removes the outdoor lightning exposure, but NOAA still recommends avoiding contact with plumbing and electrical systems inside buildings during thunderstorms. :contentReference[oaicite:10]{index=10}
Because an indoor spa combines water, plumbing and electrical equipment, the conservative choice is to wait until the storm has passed before using it.
What About Swimming Pools?
The same basic rule applies to swimming pools.
When thunder or lightning is present:
- Get everyone out of the pool.
- Move away from the water.
- Do not shelter beneath an open pavilion, patio cover or tree.
- Move into a substantial enclosed building or enclosed hard-topped vehicle.
- Wait at least 30 minutes after the last thunder before returning.
The National Weather Service specifically advises people to get out of pools, lakes, rivers and other bodies of water when lightning threatens. :contentReference[oaicite:11]{index=11}
Simple Thunderstorm Safety Rule For Pools & Hot Tubs
You do not need sophisticated equipment to make the basic decision.
Hear thunder? Get out of the water and go indoors.
Wait at least 30 minutes after the last thunder before returning.
It is a simple rule, but it removes the temptation to guess whether lightning is close enough to be dangerous.
Keep Your Spa's Electrical Safety Equipment In Good Condition
Thunderstorms are only one reason the electrical system around a hot tub needs to be maintained properly.
CPSC recommends properly installed GFCI protection and qualified electrical inspection of pool and spa systems. :contentReference[oaicite:12]{index=12}
If your hot tub:
- Repeatedly trips the GFCI
- Has damaged or overheated wiring
- Has water entering electrical components
- Produces a tingling sensation
- Has flickering or malfunctioning underwater lighting
- Shows burned terminals or connectors
stop using the spa until the problem has been properly diagnosed.
The Bottom Line
A hot tub should never be used during a thunderstorm. If you hear thunder or see lightning, get everyone out of the water and move indoors.
Do not rely on a covered patio, gazebo, GFCI, nearby trees or the fact that rain has not started yet. Lightning can strike well outside the main rain area of a storm.
Wait at least 30 minutes after the final sound of thunder before returning to the spa.
For additional information about electrical hazards, water cleanliness, temperature, drain safety, children, pets and other pool and spa safety topics, visit our Water Safety Knowledge Base.
If a storm appears to have damaged your spa equipment and you need help identifying a heater, pump, circuit board, sensor, control system or another replacement component, visit our Find My Part page or contact Bath & Spa Parts Online for assistance.