The Best Smart Thermostat Deals For March 2025

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On April 8, 2025

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March weather is hard to predict. Some days it’s sunny, some it’s pouring, and some days you get both. If your old-fashioned heating system can’t keep up, it’s time to pick up a smart thermostat and let modern technology and AI power help you stay comfortable and save money. You can adjust your home’s target temperature from your phone or with your voice, as well as tap into features like automated scheduling and activity monitoring. If it’s time to upgrade, we’ve got sizable discounts on thermostats from the leading smart home brands in March.

In our review of the Ecobee Smart Thermostat Advanced, we raved about its large display, easy installation and compatibility with all of the major smart home platforms. Multiple modes and settings allow it to learn from your activity patterns, shut off heating when windows and doors are open, and trigger maintenance reminders. The built-in dual-band Wi-Fi hooks up to to your home network via 2.4GHz or 5GHz, and the control panel has a radar proximity sensor to adjust the temperature based on room occupancy. It’s also easily expandible with additional sensors. Right now Amazon has it on sale for $40 off.

While the Sensi Smart Thermostat doesn’t look quite as high-tech as some of the other models on this list, it’s still a very competent performer that’s a breeze to install. In our review, product expert John Delaney noted that it offers “usage reports, local weather reports, and smart alerts,” and integrates well with Amazon Alexa, Apple HomeKit, and others, as well as offering support for the HomeKit and SmartThings home automation platforms. The basic LCD screen gives you a ton of information, and at this price it’s a real bargain.

One of the longest-lived names in home heating goes back to 1885, and Honeywell has adapted with the times to produce hardware that integrates with today’s smart home systems. The Smart Color Thermostat has a large, sharp screen that delivers a ton of information, including the current temperature inside and outside, as well as your current target, mode and more. The companion app is well-designed and robust, and installation is fairly simple, with or without an electrician’s help. You can see how it compares on our list of the best smart thermostats. Best Buy has them on sale for $40 off.

Google’s Nest smart home devices get better with every generation, and we gave the latest Nest Learning Thermostat an “Excellent” rating in our review, praising the way it “uses AI to create customized heating and cooling schedules, helping you save on energy usage while ensuring even temperatures throughout your home.” With a large, clear display, it’s easy to monitor and interact with, and comes with a remote room sensor for more accurate temperature detection. Installation is simple and it’s interoperable with the Matter smart home standard so can tie in with your other devices.

This affordable unit gets even more so with a 33% discount, so if you’re setting up a smart home on a budget it’ll hit the spot. In our review of the GE Cync Smart Thermostat, we noted that it was a breeze to install and played nice with both Amazon’s Alexa and Google’s Assistant voice controls, as well as featuring a data-packed screen that provides all sorts of metrics on the health and efficiency of your heating and cooling. Remote sensors are sold separately, so keep that in mind if you have a large home or one with insulation issues.