When Is The Best Time To Water Lawn In Hot Weather (2023)

Water is vital to ensure a healthy lawn. A well-established lawn requires minimal watering even during increased temperatures.

However, extreme heat temperatures can harm your lawn.

Consequently, your grass will require more water to cool down. In this article, we discuss the best time to water the lawn in hot weather.

Knowing how much water and when to water your grass could be tricky.

Watering your lawn 2 or 3 days a week is the ideal schedule under normal weather conditions.

Yet, dispersing water when it’s 95 degrees Fahrenheit outside will only cause water to evaporate quickly, which leads to a waste of resources and effort.

During sweltering days, it’s advisable to soak the soil into a depth of 1 to 2 inches per week.

Just like standard watering rules, the best time to water your lawn is in the early morning.

​Yet, this can only be effective if you know how much water to release or how long to water in hot weather.

Related post: Seasonal Lawn Care Guide and Tips

Table of Contents

  • 1 What Happens if I Don’t Water My GrassIn Hot Weather?
  • 2 When is the Best Time to Water Lawn in Hot Weather?
    • 2.1 When Should I Water the Lawn When it’s Hot?
    • 2.2 Should You Water Plants in the Middle of the Day?
    • 2.3 Should I water My Lawn At Night?
  • 3 How Often Should I Water your grass in Extreme Heat?
  • 4 How Much Water Should I Give My Lawn in Hot Weather?
  • 5 How Long Should I Water My Grass?
  • 6 When Should I Stop Watering My Lawn in Hot Weather?
  • 7 What If I’ve Overwatered My Lawn in Hot Weather?
    • 7.1 Do Not Mow Grass Too Short When Watering Lawn in Hot Weather
  • 8 To Sum It Up…
    • 8.1 What Happens if I Don’t Water My GrassIn Hot Weather?
    • 8.2 When Should I Water the Lawn When it’s Hot?
    • 8.3 Should You Water Plants in the Middle of the Day?
    • 8.4 Should I water My Lawn At Night?
    • 8.5 How Often Should I Water your grass in Extreme Heat?
    • 8.6 How Much Water Should I Give My Lawn in Hot Weather?
    • 8.7 How Long Should I Water My Grass?
    • 8.8 What If I’ve Overwatered My Lawn in Hot Weather?
    • 8.9 When Should I Stop Watering My Lawn in Hot Weather?
    • 8.10 Should I mow The Lawn More in Hot Weather?
  • 9 References:

What Happens if I Don’t Water My GrassIn Hot Weather?

When Is The Best Time To Water Lawn In Hot Weather (1)

Cool-season grasses can survive prolonged periods of dry weather. For instance, a Kentucky seagrass will only grow dormant for up to six weeks, a natural survival mechanism for grass.

The leaves will turn color to either brown or yellow, but the lawn remains alive.

But if it goes beyond six weeks, you face the risk of your lawn dying. This is why it’s still advisable to water a lawn in hot weather.

Related post: Will Watering Dead Grass Bring My Lawn Back Life?

Similarly, lawns are likely to grow brown-colored leaves when deprived of water. The summer heat will oblige you to water your lawn more to prevent it from becoming drought-stressed.

This is especially true when there’s a combination of high temperatures and strong winds.

When your location has extreme temperatures of the high 90s and over 100 degrees Fahrenheit for an extended period.

You might need to water your lawn more than the recommended sprinkler run times of three times a week.

When is the Best Time to Water Lawn in Hot Weather?

When Is The Best Time To Water Lawn In Hot Weather (2)

Temperatures are at their lowest during the early morning or late evening. Hence, the best time to water lawns is when air temperatures are lower and when there is dew on the ground.

Know that there are tiny openings on the surface of the leaves called stomata, which remain open throughout the day. Water can get evaporated from the stomata.

When Should I Water the Lawn When it’s Hot?

The break of dawn is the best time of day to water your lawn in hot weather. This is even the recommendable time in cold and normal conditions.

The early hours of the morning are effective because evaporation is low at this time due to outdoor cooler temperatures.

Thus, there’s no water waste since there is less wind, and the water gets to remain on the lawn.

(Video) The Best Time to Water Your Lawn During Hot Summer Months

It could be anytime before 10 a.m. but ideally between 6 to 8 a.m., only if the crack of dawn isn’t ideal for your schedule. As long as you get to soak the soil deeply, little to no water is lost to evaporation.

Remember, do not water a lawn when it’s approaching midday, especially when there’s full sun.

Water as early as you can to give time for your lawn to dry up during the day and avoid creating optimal conditions for fungal growth.

Related post: Watering New Grass Seed: How Much To Water After Overseeding Your Lawn

Should You Water Plants in the Middle of the Day?

High sun + hot weather = too much evaporation

Choosing midday to water a lawn in hot weather is counter-productive because a lot of water won’t reach the soil due to evaporation.

Aside from rapid evaporation, strong winds at midday may cause uneven water dispersal. Strong winds might spread the water onto sidewalks, driveways, or streets.

Should I water My Lawn At Night?

Watering the lawn early in the day gives ample time for the grass to dry out, and the roots could still achieve water uptake.

While the sun is not a threat at night, watering lawns in the late evening or night may cause the grass to stay damp overnight, making your lawn susceptible to disease.

Likewise, the continuous temperature drop could be detrimental to your lawn because water may remain stagnant, which invites fungal growth.

Early in the morning remains to be the best time to water a lawn in hot weather.

Related post: Is Watering Lawn At Night A Good Idea?

How Often Should I Water your grass in Extreme Heat?

When Is The Best Time To Water Lawn In Hot Weather (3)

As a general rule, it is ideal for watering a lawn in hot weather infrequently yet thoroughly instead of lightly misting at various times of the day.

You must water your lawn in hot weather at least three times per week, as long as you soak the soil to a depth of at least 6 to 8 inches.

Akin to normal conditions, watering your lawn daily will create a shallow root system, which dries out fast and weakens your lawn.

Therefore, less frequent but deep watering is preferable because it encourages grassroots to develop and run robust systems underneath the soil.

This enables your lawn to be more robust and disease-resistant.

How Much Water Should I Give My Lawn in Hot Weather?

Lawns with clay soil or more shade don’t require much water because they can retain more moisture.

On the other hand, porous and sandy soil might need more water.

When watering a lawn in hot weather, you should at least provide 1 to 1.5 inches of water every early morning or during each watering session.

Note that you have to produce this amount three times a week.

Soil TypeAbsorption CapabilitiesDepth of 1-inch water
ClayIt holds water longer because it absorbs water slowly.4 to 5 inches
SandyIt needs less water because it can absorb water quickly.12 inches
LoamReduces the risk of runoff or puddling because it absorbs water evenly7 inches

How Long Should I Water My Grass?

It is ideal for watering your lawn about 1 inch of water for every single application per week. On average, it takes 30 minutes to disperse 0.5 inches of water.

Therefore, you must water your lawn in hot weather three times per week, for about 30 minutes each, to get an inch of water on your lawn.

Moreover, it can be easier if you use a sprinkler system to water a lawn in hot weather – but if you don’t have one, the next best thing is an oscillating sprinkler to water your lawn.

As an aside, if you’re looking for a sprinkler for your lawn, we highly recommend this oscillating sprinkler. The ease of use and range that this sprinkler has is just incredible. Plus, it has a built-in timer, so it’ll automatically shut off when set to a particular time.

When Is The Best Time To Water Lawn In Hot Weather (4)

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(Video) The Best Time Of Day To Water Your Lawn

A typical lawn sprinkler zone produces about 0.27 to 0.30 inches of water per hour.

When it’s extremely hot, the average amount of moisture evaporating from the soil is about 0.25 to 0.35 inches per day. Meaning, your lawn will only get about 50% of the water.

But sometimes, this won’t be appropriate for particular lawns. You can experiment to measure how long you should keep your sprinklers open to water a lawn in hot weather.

When Should I Stop Watering My Lawn in Hot Weather?

It is recommendable to use a rain gauge to measure whether you’ve achieved the ideal amount of water.

When Is The Best Time To Water Lawn In Hot Weather (5)

But if you don’t have one, you can place an empty can on your lawn. When you’ve filled up the can to your desired amount, it means you’ve supplied the necessary water.

Meanwhile, there are visual signs you can monitor when you water a lawn in hot weather.

For example, do you see green grass instead of brown, narrow ones?

Then, your lawn is healthy, and you’ve watered it correctly despite the hot conditions. Even if you don’t have a sprinkler system, your lawn still needs to be watered – especially in hot weather.

With that said, your grass needs water. Worse case, you use a garden hose to water your lawn by hand.

If you’re looking for a garden hose, we suggest this retractable garden hose reel. It’s super easy to reel back in, and the hose itself is heavy-duty grade durable. It is on the pricey side, but it’s so worth the investment.

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When Is The Best Time To Water Lawn In Hot Weather (6)

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Another good way to check is to probe the soil using a screwdriver. You will know if your lawn gets a sufficient amount of water each week when you can easily submerge the probe into the soil.

(Video) When is the best time to water your lawn?

If not, then you can ramp up your watering schedule.

Related post: When to Stop Watering Your Lawn in the Fall

What If I’ve Overwatered My Lawn in Hot Weather?

I understand that the hotter conditions may lead you to think that you have to boost up watering.

While this is true, you must remember that early morning is the best time to water a lawn in hot weather.

The ample time will allow your soil to soak up the water and give it a chance to let the roots take up water as well.

Thus, it would help if you didn’t worry about overwatering your lawn, not unless you meticulously water it three times a day, which is a big no-no.

Do Not Mow Grass Too Short When Watering Lawn in Hot Weather

Traditionally, you must not clip off more than a third of the length of your grass. It would help if you did not cut it often, too.

Furthermore, taller leaves protect the bottom part of the grass from burning due to the hot weather.

Additionally, tall grass slows down evaporation, which is helpful when you water a lawn in hot weather, especially in the early morning.

To Sum It Up…

Plants are like humans. They enjoy having a sufficient amount of water. The best time to water a lawn in hot weather is from dawn until the early morning hours or when the sun isn’t fully shining yet.

Remember to focus on your watering when the temperature is low and there’s not much wind.

Related post in lawn care: 5 Best Grub Killers For Your Lawn

What Happens if I Don’t Water My GrassIn Hot Weather?

The leaves will turn color to either brown or yellow, but the lawn remains alive.

But if it goes beyond six weeks, you face the risk of your lawn dying. This is why it’s still advisable to water a lawn in hot weather.

Cool-season grasses can survive prolonged periods of dry weather. For example, Kentucky seagrass will go dormant for up to six weeks, a natural survival mechanism for grass.

When Should I Water the Lawn When it’s Hot?

It could be anytime before 10 a.m. but ideally between 6 to 8 a.m., only if the crack of dawn isn’t ideal for your schedule. As long as you get to soak the soil deeply, little to no water is lost to evaporation.

Should You Water Plants in the Middle of the Day?

No, High sun + hot weather = too much evaporation. Choosing midday to water a lawn in hot weather is counter-productive because a lot of water won’t reach the soil due to evaporation.

Should I water My Lawn At Night?

No. While the sun is not a threat at night, watering lawns in the late evening or night may cause the grass to stay damp overnight, making your lawn susceptible to disease.

Likewise, the continuous temperature drop could be detrimental to your lawn because water may remain stagnant, which invites fungal growth.

(Video) Lawn Watering Tips - How long should you water your lawn? In-ground System VS Manual Sprinklers.

How Often Should I Water your grass in Extreme Heat?

As a general rule, it is ideal for watering a lawn in hot weather infrequently yet thoroughly instead of lightly misting at various times of the day.

You must water your lawn in hot weather at least three times per week, as long as you soak the soil to a depth of at least 6 to 8 inches.

How Much Water Should I Give My Lawn in Hot Weather?

When watering a lawn in hot weather, you should at least provide 1 to 1.5 inches of water every early morning or during each watering session.

How Long Should I Water My Grass?

It is ideal for watering your lawn about 1 inch of water for every single application per week. On average, it takes 30 minutes to disperse 0.5 inches of water.

Therefore, you must water your lawn in hot weather three times per week, for about 30 minutes each, to get an inch of water on your lawn.

What If I’ve Overwatered My Lawn in Hot Weather?

In hot weather, don’t worry about overwatering your lawn – not unless you are watering it three times a day, which you should definitely don’t do.

When Should I Stop Watering My Lawn in Hot Weather?

You can get a rain gauge to measure the amount of water, but if you don’t have one, you can place an empty can on your lawn.

When you’ve filled up the can to your desired amount, it means you’ve supplied enough water to your lawn.

Should I mow The Lawn More in Hot Weather?

No. It would help if you did not cut it often. Taller grass blades protect the bottom part of the grass from burning due to the hot weather.

Furthermore, taller grass slows down evaporation, which is helpful when you water a lawn in hot weather.

Lastly, you should not mow more than a third of the length of your grass at any time.

References:

When Is The Best Time To Water Lawn In Hot Weather (7)

Lindsey Hyland

Lindsey Hyland grew up in Arizona where she studied at the University of Arizona’s Controlled Environment Agriculture Center. She continued her gardening education by working on organic farms in both rural and urban settings. She started UrbanOrganicYield.com to share gardening tips and tactics. She’s happy to talk about succulents and houseplants or vegetables and herbs – or just about anything in a backyard garden or hydroponics garden.

(Video) Lawn Watering Tips - Summer Heat

FAQs

Should I water my lawn in hot weather? ›

Avoid watering during hot periods of the day – most of the water will evaporate. With areas of lawn which don't get much sun – don't soak them as much.

Should I water the lawn in the morning of a hot day? ›

According to the experts, the best time to water your lawn is before 10am. They said: "Early morning watering is also recommended as watering your lawn during hot parts of the day can add stress to your grass." Once the sun comes up, water will begin to evaporate, meaning your lawn gets less hydration.

Should you water grass in hot sunshine? ›

Best Time to Water Grass

There is not a particular time of day that is best to water your lawn. However, if possible it is preferable to avoid watering a lawn in direct sunlight. Watering your lawn in the morning or early evening is usually the preferred time as there is less chance of direct sunlight.

What temp is too hot to water grass? ›

Avoid watering grass on a hot afternoon when it's 95 degrees or higher. The best time to water grass is at dawn or in the early evening. Water deeply three times a week instead of a little water daily.

How do you water grass in extreme heat? ›

In general, the drier the grass and soil, the less disease there will be. Another rule-of-thumb is to water “deeply and infrequently.” Water deeply to wet the entire root zone, and then do not water again until the grass is dry. To determine next watering time, simply “eye-it.” If it starts to look dry, then water.

Is it better to water in the morning or evening on a hot day? ›

If you water in the afternoon, especially during summer, the heat and sun are at their peak and the plant's water will evaporate instead of absorbing into the soil and roots. Morning watering is actually preferable to evening watering as the plant has time to dry before the sun goes down.

Should I water lawn every day during heat wave? ›

4. Don't water lawns and landscapes every day. If you water deeply and thoroughly, you won't have to. Allow the top few inches of soil to dry out between waterings.

When should you not water your lawn? ›

If your lawn gets 1 -1 ½ inch of precipitation a week, then you don't need to water your lawn yourself. Most people don't need to water their lawn in the winter because the natural rainfall or snow acts as the weekly precipitation the lawn needs.

How often should you water grass in a heatwave? ›

In times like this, it's tempting to reach for the hose and give your grass a healthy sprinkle of water. But according to one gardening expert, you should never water your lawn – even during summer heatwaves.

Should I leave my grass longer in hot weather? ›

Keeping grass a little longer in the heat of summer helps,” explains Williams. “The roots extend deeper into the earth, keeping weeds from coming up and competing for water. And because the turf is denser, it requires less water.” Williams recommends a blade height of about 4 inches during the summer months.

Should you water at night summer? ›

The most efficient times to water your garden are when the sun will have the least impact, either early morning and/or late afternoon/evening. The best time to water your garden would be when it's still cool in the morning but isn't too late and dry.

Is it better to run sprinklers at night or morning? ›

Watering in the morning (before 10 a.m.) is the best time for your lawn; it's cooler and winds tend to be calmer so water can soak into the soil and be absorbed by the grass roots before it can evaporate.

How long should you water your lawn? ›

The ideal watering schedule is once or twice per week, for about 25 to 30 minutes each time. Taking care of a lawn doesn't have to be an overwhelming, all-consuming task.

How do I stop my grass from burning in the sun? ›

Long, less frequent watering is more effective than daily watering that leaves water droplets on grass blades that then reflect the sun, burning your grass. Once or twice a week, depending on rain levels, water your grass for a significant amount of time that allows water to seep into the soil to the roots.

When it's 100 outside should I water my grass twice a day? ›

In the blazing summer, when temperatures are between 90-100+, try watering 3-4 times a week.

Should I water my grass day or night? ›

Water your lawn in the morning and in the evening. You are best watering when it's not the heat of the day. You also don't want to water at night, as this can cause fungal issues in your lawn. Water for longer time periods, less frequently.

How long should you water your lawn per day? ›

How should the irrigation be scheduled? Water once a week for 42 minutes. Water twice a week for 21 minutes each day. Water 3 times a week for 14 minutes each day.

How long should a sprinkler run? ›

Sprinklers should be set to run for about 30 to 35 minutes at a time twice a week. Your goal is at least 1″ of water a week for your lawn. When it's hot and dry, double the water times while still trying to water just 2 or 3 days a week.

Should you water lawn everyday during heatwave? ›

4. Don't water lawns and landscapes every day. If you water deeply and thoroughly, you won't have to. Allow the top few inches of soil to dry out between waterings.

Should you water the grass every day during heatwave? ›

In times like this, it's tempting to reach for the hose and give your grass a healthy sprinkle of water. But according to one gardening expert, you should never water your lawn – even during summer heatwaves.

How do you keep grass alive in a heatwave? ›

Water when you Wake

This may seem like a no brainer, but watering grass during extreme heat is the single most important thing you can do to keep it alive. We recommend watering daily with heat like this, but please be sure to abide by local regulations for water usage in your state.

Is it better to water grass in the morning or evening? ›

Watering in the morning (before 10 a.m.) is the best time for your lawn; it's cooler and winds tend to be calmer so water can soak into the soil and be absorbed by the grass roots before it can evaporate.

How often should I water my lawn in heatwave? ›

For best results, water your lawn thoroughly three times a week if we do not get significant rainfall. In hot, dry weather, water shrubs and flowers daily. Morning, around 6 to 8 a.m., is the best time to water. Watering at any time of day is better than not watering at all.

How often should I water my grass in hot weather? ›

Lawn watering consumes nearly half of the water used by most homes during the warmest months of the year. Many of us water too often and too long. Most lawns need to be watered no more than three days a week in the spring as well as in the summer and two days a week in the fall.

Should I leave my grass long during heat wave? ›

During heat waves, lawns should be kept at 3-4 inches in height. Leaving grass a little taller helps to retain water and encourages a deeper root growth. The deeper the roots, the easier it is for grass to access moisture even after the first couple inches of soil surface dries out.

How long should you water your lawn in minutes? ›

On average, it takes 20 minutes, three times a week, to get 3 cm of water all over the lawn. This formula works best with healthy, well-maintained soil that provides good drainage while providing the right amount of water retention at the roots. Damaged or poorly cultivated soil will lead to saturation of the latter.

How many days you should water your lawn? ›

Watering every day is not advised. It should be done 2 to 3 times per week only to prevent a shallow root system. If possible, water during the early morning hours to ensure that the lawn dries entirely before nightfall.

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