What temperature should my lap pool be for training vs. recreational swimming?

Training pools should sit around 78–82°F to help you dump heat and perform better; anything over 83°F will make you sluggish. Recreational swimming is better at 82–86°F for comfort, especially for kids or older folks. Multipurpose pools at 82–83°F often leave neither group happy, so pick the temperature for what you’re actually doing that day.