Every Florida homeowner knows the feeling: you open your FPL bill in August and wonder if something has gone terribly wrong. Air conditioning accounts for the majority of energy costs in South Florida homes during the summer, and the temperature you set on your thermostat has a direct and significant impact on what you pay each month. The good news is that a few smart adjustments can trim your utility bill without turning your home into a sauna. Here’s what the experts recommend.

The Magic Number: 78°F When You’re Home

The U.S. Department of Energy recommends setting your thermostat to 78°F when you’re home and active. For many people raised on 72°F, that might sound uncomfortably warm — but paired with ceiling fans and proper humidity control, most homeowners find 78°F perfectly livable. The key principle is simple: every degree you raise your thermostat above where you’d normally set it saves you roughly 3% on your cooling costs. In a Florida summer, those degrees add up fast on a monthly bill.

What to Set It at When You’re Away

When the house is empty during the day, raise your thermostat to around 85°F — but never turn it off completely. This is a mistake many homeowners make, thinking they’ll save more by shutting the system down entirely. In Florida’s humidity, an AC that’s been off all day has to fight through 90°F heat and near-tropical moisture levels to bring your home back down to a comfortable temperature. That recovery process uses far more energy than simply maintaining a higher setpoint throughout the day. Your system also works as a dehumidifier, and without it running, mold and mildew can begin developing in as little as 24 to 48 hours.

Nighttime Settings: Comfort vs. Savings

At night, most people sleep best between 68°F and 72°F — but dropping to those temperatures all night in a Florida summer is costly. A smart compromise is setting the thermostat to 74°F to 76°F at bedtime and using a ceiling fan to create a wind-chill effect that makes the room feel several degrees cooler than it actually is. Ceiling fans don’t lower the temperature — they lower how warm you feel, which means you can set the AC higher and still sleep comfortably. Just remember to turn fans off when you leave the room; they cool people, not spaces.

The Case for a Smart or Programmable Thermostat

Managing these temperature shifts manually every day is something most homeowners simply don’t do consistently. A programmable or smart thermostat does it for you automatically based on your schedule. Smart thermostats like the Nest or Ecobee learn your patterns, adjust in real time, and can be controlled remotely from your phone — so if you leave work early, you can start cooling the house before you arrive. Studies show smart thermostats save homeowners an average of 10% to 15% on annual heating and cooling costs. For a Florida home running AC nearly year-round, that’s a meaningful number.

Other Ways to Help Your AC Work Less Hard

Temperature settings matter, but they’re only part of the equation. To maximize savings, pair your thermostat strategy with these habits:

• Keep blinds and curtains closed during peak sun hours to block radiant heat
• Replace your air filter monthly to maintain strong, efficient airflow
• Seal gaps around doors and windows to prevent cool air from escaping
• Schedule bi-annual AC tune-ups to keep your system running at peak efficiency
• Avoid using heat-generating appliances like ovens during the hottest part of the day

A Well-Maintained System Makes Every Degree Count

The best thermostat strategy in the world won’t save you much money if your AC system is running inefficiently due to dirty coils, a clogged drain line, or low refrigerant. A properly maintained system cools faster, runs shorter cycles, and uses significantly less energy to hit and hold your target temperature. That’s money back in your pocket every single month.

TrueCool AC helps South Florida homeowners get the most out of every degree. Schedule your maintenance visit or system evaluation today at truecoolac.com and start saving on your next utility bill.