To achieve a happy, healthy lawn, you should be thoroughly saturating your soil. It is better to water less frequently, every other day or every three days depending on your conditions. Saturating the soil will encourage the roots to reach deeply for residual water, even when the surface of the soil appears dry.
The most effective way to water your lawn is before the heat of the day. Watering early in the day will ensure a sufficient store of moisture beneath the soil to withstand the heat of a hot summer day.
Rain isn’t always sufficient at supplying enough water for your lawn to thrive, so don’t count on it to keep your lawn healthy. It is helpful to use a rain gauge to monitor the amount of weekly rainfall and if the gauge gets less than 1-inch of rain per week, supplement by watering. During the peak of summer, it is recommended to double that amount.