Optimizing Your Water Heater Settings for Summer: What Temperature Is Best?
When the summer heat rolls in, your water heater probably isn’t the first thing on your mind—but adjusting its settings can help you save money, improve safety, and extend the life of the appliance. Just like your thermostat, your water heater doesn’t need to work as hard in warmer weather. Making small tweaks to your water heater’s temperature settings during the summer months can have a noticeable impact on energy consumption and utility bills.
Why Adjust Your Water Heater for Summer?
- Energy Efficiency: In hot weather, your pipes and surroundings naturally stay warmer, so your water heater doesn’t need to exert as much energy to maintain high temperatures. Lowering the temperature can reduce your energy usage significantly.
- Safety: Scalding water is always a concern, especially in homes with children or elderly individuals. During summer, when your baseline water temperature is already warmer, it’s easier to reach unsafe levels.
- Cost Savings: Water heating accounts for about 18% of your home’s energy usage, according to the U.S. Department of Energy. Even a 10–20°F reduction in temperature can yield noticeable savings.
Recommended Water Heater Temperature for Summer
The U.S. Department of Energy recommends keeping your water heater at 120°F (49°C) year-round for most households. This setting provides a good balance between comfort, safety, and energy efficiency.
However, during summer, some households can experiment with lowering the temperature slightly—down to around 115°F (46°C)—especially if:
- You live in a hot climate
- You don’t use hot water as frequently (e.g., you take more cool showers)
- You have a tankless or on-demand water heater that heats water quickly
Just be cautious not to drop the temperature below 110°F (43°C), as this can increase the risk of bacterial growth, such as Legionella, which thrives in warm, stagnant water.
How to Adjust Your Water Heater Temperature
For a Gas or Electric Tank Water Heater:
- Turn off power or gas supply before adjusting (safety first).
- Locate the thermostat dial—typically found behind a small metal panel on the side of the tank.
- Use a flathead screwdriver to adjust the temperature.
- After adjusting, wait 3-4 hours and test water temperature at a faucet to confirm the change.
For a Tankless Water Heater:
- Most have a digital control panel, allowing precise temperature settings. Simply adjust it down to 115–120°F as needed.
Other Summer Water Heater Tips
- Consider turning it off if you’ll be away from home for more than a few days.
- Insulate hot water pipes to maintain warmth while reducing the energy needed to reheat.
- Flush the tank seasonally to remove sediment that can reduce efficiency (especially in areas with hard water).
Your water heater works year-round, but it doesn’t need to work as hard when the sun is blazing outside. By setting your water heater to around 115–120°F in summer, you can keep your showers comfortable while trimming your energy bill. It’s a simple, often-overlooked adjustment that pays off in both dollars and peace of mind.
Have a smart water heater or need help adjusting yours? Contact our team for 24/7 HVAC support today!
