The Department of Energy recommends setting your water heater temperature to 120 degrees F to save energy. However, depending on your home's needs, you may require hotter water. The standard temperature for most water heaters is 140 degrees F. Just bear in mind that any setting below 120 degrees F creates a conducive environment for the growth of bacteria inside your tank. Consider the following variables as they may affect what temperature you should set for your water heater. Your health Your dishwasher The number of people in your home Whether you have kids or older adults