Watering Turf Grass in Summer: A Practical Guide

With our lingering drought here in the Northeast, how should you be watering your turf this summer season? Cooler temps have allowed lawns to still do well despite the dry weather so far this season, but as temps are about to increase watering will become more important. 

Proper watering practices during summer are essential for maintaining healthy turf. Building resilient turf requires a combination of sound fertility programs and effective cultural practices. One of the most important cultural practices is irrigation.

At PJC, we recommend watering deeply, infrequently, and during the early morning hours. This approach encourages deeper root development, improves drought tolerance, and helps turf better withstand summer stress. By adjusting irrigation schedules throughout the season, you can optimize soil moisture while avoiding common issues associated with overwatering.

For most established turf areas, applying approximately ¾ inch to 1¼ inches of water per week is sufficient to maintain healthy growth during summer. Newly seeded areas and periods of extreme heat may require more frequent watering for shorter durations. Overwatering, however, can contribute to soil compaction and increase the likelihood of turf diseases.

Use the 1-2-3-2-1 Watering Method

Watering Method Developed by Organo Lawn.

Seasonal water needs change throughout the year. The following schedule provides a simple framework for adjusting irrigation frequency:

1 Day Per Week
Early Spring (Irrigation Start through April 30)

2 Days Per Week
Early Summer (May 1 through June 21)

3 Days Per Week
Mid-Summer (June 21 through August 7)

2 Days Per Week
Late Summer (August 8 through September 21)

1 Day Per Week
Fall (September 22 through Irrigation Blowout)

This schedule helps maintain adequate moisture while encouraging roots to grow deeper into the soil profile.

Measure Water Output with the Tuna Can Test

Not sure how much water your irrigation system is delivering?

Try the tuna can test. Place several empty tuna cans around the lawn and run your irrigation system. Measure how long it takes to collect approximately 1 to 1.5 inches of water. This simple test can help you determine whether you need to adjust run times or watering frequency based on site conditions.

When Is the Best Time to Water?

Timing matters just as much as the amount of water applied.

For optimal absorption, a 1:00 a.m. irrigation start time will generally allow watering to finish before 7:00 a.m. Watering during the early morning hours reduces evaporation losses and gives turf adequate time to dry before temperatures rise.

Whenever possible, avoid watering between 8:00 a.m. and 8:00 p.m. when evaporation rates are highest. Always follow any local watering restrictions or municipal guidelines that may apply in your area.

What If You Do Not Have Irrigation?

For cool-season turf grasses, allowing the lawn to enter summer dormancy is often preferable to applying insufficient supplemental water. Dormant turf can recover when favorable growing conditions return, provided the turf crown remains healthy.

Healthy Turf Starts with Smart Watering

Summer watering is about more than keeping grass green. Proper irrigation encourages deeper roots, improves drought resilience, and supports overall turf health. By watering deeply, watering infrequently, and watering early in the day, you can help your lawn or athletic field perform better throughout the summer season.

For additional seasonal recommendations, be sure to read our Summer Turf Tips Part 1 & Part 2 articles.