As the name suggests, the primary purpose of a pool thermometer is to monitor the pool temperature and has multiple benefits. For instance, if the pool water is too cold, over 60 degrees Fahrenheit, swimming in such water can lead to cold shock. Besides, a pool thermometer allows you to save money and power by monitoring the pool temperature. Once the pool reaches the required temperature, you can turn off the heater, which is quite cost-saving. A pool thermometer is also practical during maintenance and pool calibration.