It’s impossible to say how much it will cost to heat an indoor swimming pool definitively because the answer depends on factors that are unique to you, such as the energy costs in your area. While there is no blanket answer to the question of how much it will cost to heat an indoor pool, some universal practices are recommended to keep your pool heating costs within reason.
As a general rule, it’s wise to keep the water temperature at 78 degrees if you swim laps. If you use your indoor pool for recreational purposes, the temperature of the water should be maintained at 82 degrees. Turning up the temperature just one degree can increase your heating costs by as much as 10 percent.
If you’re not going to use your indoor swimming pool for three days or longer, you can cut your heating costs by turning off the heat and turning the thermostat back on at the desired temperature a few hours before you use your pool again. Alternatively, you can adjust the temperature to 60 degrees to prevent your heating system from working harder than necessary during times when you’re not using your pool. These tactics are advisable because reheating a pool consumes less energy than maintaining it at its original temperature.