Living in South Florida means your air conditioner has two important jobs: keeping your home cool and removing moisture from the air.
That makes choosing the right thermostat setting a little more complicated than simply picking the lowest temperature that feels comfortable. Set your thermostat too low, and your AC may work harder than necessary and drive up your electric bill. Set it too high—or manage it incorrectly—and your home may start to feel warm, sticky, and humid.
So, what is the best thermostat setting for a Florida home?
For many homeowners in Broward and Palm Beach counties, around 76°F to 78°F while you’re home is a good starting point. Your ideal setting will ultimately depend on your comfort preferences, your home’s insulation, your HVAC system, and how well the system controls humidity.
Here’s how to find the right balance.
What Is the Best Thermostat Setting for Florida in the Summer?
A good starting point for most Florida homes is:
- 76°F–78°F when you’re home
- Around 78°F–80°F when you’re away for several hours
- Approximately 74°F–76°F at night, depending on your sleeping preference and home’s humidity level
These aren’t hard rules. The best thermostat temperature is the highest setting that keeps your family comfortably cool while allowing your air conditioner to adequately control indoor humidity.
The U.S. Department of Energy recommends setting your thermostat as high as comfortably possible during warmer months because a smaller difference between indoor and outdoor temperatures can reduce cooling costs. U.S. Department of Energy summer energy-saving guidance
In South Florida, however, temperature is only part of the equation.
Why Does Humidity Matter When Setting Your Thermostat in Florida?
Florida’s high humidity can make a 76-degree home feel very different from a 76-degree home in a drier climate.
Your central air conditioner removes moisture as warm indoor air passes over the cold evaporator coil. If your AC operates properly and runs for appropriate cooling cycles, it can remove a significant amount of moisture while cooling your home.
That’s why you shouldn’t judge AC performance based on temperature alone.
If your thermostat reads 74°F but your home still feels damp or clammy, simply lowering the temperature isn’t necessarily the solution. High indoor humidity could point to an airflow problem, an improperly sized HVAC system, ductwork issues, or an AC system that needs service.
Zoom Zoom Air Conditioning provides comprehensive air conditioning services for Broward and Palm Beach County homeowners, including diagnosing cooling and humidity problems.
What Should Indoor Humidity Be in a Florida Home?
For most homes, keeping relative humidity below about 60% is important, with many homeowners finding a range around 40% to 55% more comfortable.
When humidity rises too high, you may notice:
- Rooms that feel warmer than the thermostat indicates
- A sticky or clammy feeling indoors
- Condensation around vents or windows
- Musty odors
- Increased potential for mold and mildew growth
If your AC runs regularly but can’t keep humidity under control, the thermostat setting may not be the real problem.
Should You Set Your Thermostat to 78 Degrees in Florida?
You’ve probably heard that 78°F is the ideal summer thermostat temperature.
But 78°F isn’t a magic number.
It can be an energy-efficient starting point, particularly during the day, but some South Florida homeowners will find 78°F comfortable while others won’t. Factors including ceiling fans, sunlight exposure, insulation, windows, airflow, and humidity can all affect how a temperature actually feels.
Instead of forcing your home to stay at exactly 78°F, try gradually increasing your usual thermostat setting by one degree and seeing whether you’re still comfortable.
Even a small adjustment can reduce the amount of time your AC has to operate during Florida’s hottest months.
What Is the Best Thermostat Setting at Night in Florida?
Many people prefer a cooler bedroom for sleeping, so 74°F to 76°F is a reasonable starting range for many South Florida homes.
Using ceiling fans can also make rooms feel cooler without requiring you to substantially lower the thermostat.
Remember that fans cool people, not rooms. Turn them off when you leave an unoccupied room to avoid wasting electricity.
If you find yourself setting the thermostat extremely low every night just to feel comfortable, there may be another issue affecting your home’s cooling or airflow.
What Temperature Should I Set My Thermostat When I Leave Home?
If you’re going to work or leaving the house for several hours, consider raising the thermostat a few degrees instead of turning your AC off.
For many Florida homeowners, somewhere around 78°F to 80°F is reasonable for shorter periods away.
Completely shutting down the AC during a hot, humid Florida day can allow indoor temperatures and humidity to climb significantly. When you return, your system then has to remove that accumulated heat and moisture.
A programmable or smart thermostat makes these adjustments much easier.
ENERGY STAR notes that smart thermostats can automatically adjust cooling based on your schedule and allow you to control your HVAC system remotely. Learn more about ENERGY STAR-certified smart thermostats
Should I Turn My AC Off When I Go on Vacation in Florida?
Generally, no.
Leaving a South Florida home with no air conditioning for an extended period isn’t a good idea because your AC also helps manage indoor moisture.
Instead, raise your thermostat while you’re away. Many homeowners use a setting somewhere around 78°F to 82°F, depending on the home, season, contents, pets, and humidity conditions.
A smart thermostat can be particularly helpful when traveling because you can monitor and adjust your home’s temperature remotely.
If humidity control is a recurring problem even while the AC is operating, Zoom Zoom can evaluate the system during an AC tune-up or preventive maintenance visit.
Should the Thermostat Fan Be Set to AUTO or ON in Florida?
AUTO is usually the better thermostat fan setting for Florida homes.
When the thermostat is set to AUTO, the blower fan runs while your AC is actively cooling and then shuts off when the cooling cycle ends.
When the fan is continuously set to ON, air keeps moving across the evaporator coil after the compressor stops. In humid climates, some of the moisture remaining on that coil can potentially be carried back into the home’s air rather than draining away.
For that reason, homeowners trying to control indoor humidity will generally want to leave the thermostat fan on AUTO unless an HVAC professional recommends otherwise for their particular system.
Why Does My House Feel Humid Even With the AC Running?
If the thermostat temperature looks right but your house feels humid, the problem may extend beyond your thermostat settings.
Possible causes include:
An Oversized AC System
An oversized air conditioner can cool your home very quickly. That might sound like a good thing, but short cooling cycles may not give the system enough time to remove moisture effectively.
ENERGY STAR specifically notes that an oversized air conditioner can cool a room while failing to remove enough humidity, creating a damp or clammy feeling.
Dirty Air Filters or Restricted Airflow
A clogged filter can restrict airflow through your HVAC system and reduce its ability to cool and dehumidify effectively.
Dirty Evaporator Coils
Dirt and buildup on HVAC components can interfere with heat transfer and system performance.
Ductwork Problems
Leaking ducts can pull warm, humid attic or outdoor air into the HVAC system and make it harder to maintain comfortable indoor conditions.
An Aging or Struggling AC System
Older HVAC equipment may lose efficiency or have trouble maintaining both temperature and humidity during South Florida’s hottest weather.
If your system struggles to maintain your thermostat setting, needs frequent repairs, or leaves your home consistently humid, it may be time to schedule professional AC repair in Broward or Palm Beach County.
Does Lowering the Thermostat Cool Your House Faster?
No. Setting your thermostat to 65°F instead of 75°F generally doesn’t make a standard central air conditioner cool the house faster.
Your system cools at its normal operating capacity until it reaches the thermostat setting.
Setting the temperature extremely low simply tells the system to continue operating longer.
If your home is 80°F and you’re trying to reach 75°F, setting the thermostat to 68°F won’t typically get you to 75°F any faster.
Can a Smart Thermostat Help With Florida Energy Bills?
It can.
Smart thermostats are especially useful in South Florida because air conditioning represents such a significant part of household energy use.
Depending on the thermostat, you may be able to:
- Automatically raise temperatures when nobody is home
- Lower the temperature before your family returns
- Monitor HVAC runtime
- Control temperatures from your phone
- Receive alerts about unusual system activity
- Track temperature and, on some models, indoor humidity
The goal isn’t necessarily to keep changing the thermostat throughout the day. It’s to avoid cooling an empty house more than necessary while still protecting the home from Florida heat and humidity.
Don’t Constantly Change Your Thermostat
Frequent dramatic temperature changes aren’t necessary for most homes.
A more effective strategy is to establish a comfortable baseline temperature and use modest scheduled adjustments when your family is sleeping or away.
For example:
Morning and evening: 76°F
Away during the day: 79°F
Sleeping: 74°F–76°F
Your settings may be different, and that’s fine.
The important thing is finding a schedule that balances comfort, humidity control, and energy efficiency.
When Thermostat Changes Don’t Solve the Problem
If you have to keep lowering the thermostat just to stay comfortable, your thermostat might not actually be the issue.
Your HVAC system may need maintenance or repair if you notice:
- Your home rarely reaches the thermostat setting
- The AC runs almost continuously
- Certain rooms stay much warmer than others
- Indoor humidity consistently stays high
- Your electric bills suddenly increase
- Your AC turns on and off frequently
- Airflow from the vents feels weak
- The system blows warm or lukewarm air
Regular HVAC maintenance can help identify problems before they lead to a breakdown during South Florida’s hottest weather. Zoom Zoom offers a maintenance plan for Broward and Palm Beach County homeowners designed to keep cooling systems operating efficiently and reliably.
Best Florida Thermostat Settings: Quick Answers
What is the best thermostat setting for Florida summer?
For many homeowners, 76°F to 78°F while home is a good starting point. Adjust it based on comfort and humidity.
What should I set my thermostat to when I’m away?
Around 78°F to 80°F is a reasonable starting range for shorter periods away rather than shutting the AC off completely.
Should my thermostat fan be ON or AUTO in Florida?
AUTO is generally preferable in a humid climate because continuously running the blower can make humidity management more difficult.
What should indoor humidity be in Florida?
Keeping relative humidity below approximately 60% is important, with many homes feeling most comfortable around 40% to 55%.
Does setting my thermostat lower cool my home faster?
No. With most traditional HVAC systems, lowering the thermostat dramatically doesn’t make the AC cool faster; it simply makes it run longer.
Why is my house still humid at 72°F?
The problem may be HVAC sizing, airflow, ductwork, equipment condition, or another humidity-control issue rather than the thermostat temperature itself.
Keep Your South Florida Home Cool Without Overworking Your AC
There isn’t one perfect thermostat temperature for every Florida homeowner.
For most homes, 76°F to 78°F is a sensible place to start, then adjust based on your family’s comfort and indoor humidity. Just as importantly, pay attention to how your HVAC system performs.
If you’re constantly lowering the thermostat, your AC runs nonstop, or the house still feels humid despite being cool, the system may need professional attention.
Zoom Zoom Air Conditioning provides AC repair, maintenance, replacement, and installation throughout Broward and Palm Beach counties, including Coral Springs, Fort Lauderdale, Pompano Beach, Plantation, Sunrise, Boca Raton, Delray Beach, Boynton Beach, Wellington, West Palm Beach, Palm Beach Gardens, and surrounding South Florida communities.
For help improving your home’s comfort and humidity control, schedule service with Zoom Zoom Air Conditioning.