Watering Schedule for Bermuda Grass

Updated September 2026 · Garden Advice Guide

An established bermuda lawn needs about 1 inch of water per week during active growth, delivered in one or two deep soakings rather than a daily sprinkle. In hot weather, 85 to 95°F, bump that to roughly 1.35 inches split across two sessions. In a heat wave above 95°F or in constant wind, go to about 1.7 inches, still in two sessions. In cool spring and fall weather below 70°F, drop to about 0.7 inches in a single watering, and once the lawn goes dormant and brown for winter, it needs nothing at all in a normal year.

Run your own square footage through our free watering guide and it will turn those inches into gallons and sessions for your actual lawn.

Updated September 2026

The reason bermuda gets watered wrong so often is that it looks thirsty long before it is. Bermuda goes off-color in heat as a defense, not as a cry for help, and daily light watering is the response that causes most of the disease and shallow-root problems people blame on the grass.

Why bermuda needs less water than a fescue lawn

Bermuda roots run deep. In the watering data behind our calculator, warm-season turf is modeled with an effective root depth of 18 inches, against 12 inches for cool-season grass. That is why bermuda gets a lower base figure, 1 inch per week instead of the 1.25 inches a fescue lawn wants, and why it can go longer between waterings without complaint.

Deep roots only develop if you water in a way that rewards them. Water lightly every day and roots stay in the top 2 inches, because that is where the water is. Water deeply twice a week and the roots chase moisture down. Same grass, same yard, completely different drought tolerance by August.

Bermuda is also genuinely drought hardy. It will go dormant and tan in a serious dry spell and green back up when rain returns. Losing color is survival behavior, not death, and a mature bermuda lawn can sit dormant for several weeks in summer and recover fully.

A watering schedule for bermuda grass, month by month

This table uses the same weather multipliers the watering calculator applies: cool weather runs at 0.7 of the base figure, warm at 1.0, hot at 1.35, and a heat wave at 1.7. Base for warm-season turf is 1 inch per week.

Subtract rainfall. A week that delivers 0.6 inches of rain in a hot stretch leaves you 0.75 inches to make up, not the full 1.35. A simple rain gauge staked in the middle of the yard is more accurate than any forecast, since a summer thunderstorm can drop an inch on one side of town and nothing on the other.

Turning inches into gallons and minutes

Here is the conversion the whole schedule rests on:

Gallons per week = inches per week x square feet x 0.623

That 0.623 comes from simple geometry. One inch of water over one square foot is 144 cubic inches, and a gallon is 231 cubic inches, so an inch over a square foot is 0.623 gallons. An inch over 1,000 square feet is 623 gallons.

Sprinklers are rated in gallons per minute, and you almost certainly do not know yours. Measure it instead of guessing, with the can test:

1. Set five or six straight-sided cans, like tuna or cat food cans, around the zone at different distances from the head.
2. Run the sprinkler for exactly 15 minutes.
3. Measure the depth in each can with a ruler, then average the readings.
4. Multiply the average by 4 to get your output in inches per hour.

An average of 0.15 inches in 15 minutes means 0.6 inches per hour. The spread between cans matters as much as the average, since a wide spread means poor coverage, and no schedule fixes an uneven sprinkler.

A worked example: 5,000 square feet in July

Say you have 5,000 square feet of bermuda, daytime highs around 90°F, and no rain this week.

Step 1: inches needed. Base 1 inch x hot weather 1.35 = 1.35 inches for the week.

Step 2: gallons. 1.35 x 5,000 x 0.623 = about 4,205 gallons.

Step 3: sessions. With 18-inch roots in hot weather, that is two sessions, so about 2,100 gallons each, or roughly 0.68 inches per session.

Step 4: minutes. Your can test said 0.6 inches per hour. 0.68 divided by 0.6 = 1.13 hours, so about 68 minutes per session.

Step 5: the schedule. Tuesday and Saturday, starting at 5 a.m., 68 minutes per zone.

Step 6: adjust for rain. Thursday brings 0.5 inches. Saturday's session drops from 0.68 inches to about 0.18 inches, roughly 18 minutes, or you skip it entirely and resume the following Tuesday.

Two things usually surprise people here. The first is how long the sprinkler needs to run, since most people water for 15 or 20 minutes and believe they have done a deep soak. The second is that even in serious heat, twice a week is enough for established bermuda.

Watering new bermuda seed, sod and sprigs

Everything above is for an established lawn. New bermuda is the exception to deep and infrequent, because there are no deep roots yet to reach the water.

Bermuda seed takes 10 to 30 days to germinate, and it needs soil at 65 to 70°F to do it at all, which is why the seeding window is late spring through midsummer. The timing side of that job is covered in when to plant bermuda grass, and the day-by-day watering routine is the same for any new seeding, laid out in our watering schedule for a newly seeded lawn. For sod specifically, see the new sod watering schedule, including the tug test that tells you when rooting has happened.

Once the new grass has been mowed three or four times, taper to the established schedule. Staying on a daily routine past that point is what produces a shallow-rooted lawn that then struggles every August.

The best time of day to water bermuda

Water between 4 a.m. and 9 a.m. That single habit does three things at once:

• Less evaporation. Midday watering in 95°F heat and wind loses a significant share of what leaves the head before it reaches the root zone.
• Better pressure. Municipal pressure is usually at its best before the neighborhood wakes up.
• Dry blades by mid-morning. Grass that stays wet for long stretches invites fungal disease, and bermuda is prone to dollar spot and brown patch when the canopy stays damp.

Evening watering is the worst option, because it leaves the blades wet all night. If early morning genuinely is not possible, late afternoon beats evening. Watering in the middle of a hot afternoon does not burn the grass, which is a myth, but it does waste a good part of the water.

Adjust for your soil

The inches figure does not change with soil type, but the delivery does.

Sandy soil takes water fast and holds little. It cannot store a full week of moisture in the root zone, so the same weekly total gets split into three shorter sessions instead of two. Sandy lawns in Florida and the coastal South almost always need more frequent, lighter applications than the base schedule suggests.

Clay soil absorbs slowly. Run a sprinkler for 60 minutes straight on heavy clay and much of the last 30 minutes runs down the driveway. Use cycle and soak: run 20 minutes, wait an hour, run 20 more, wait an hour, run the last 20. The total is identical and the absorption is far better.

Slopes behave like clay regardless of what the soil is. Split every session and watch for runoff, which is your cue to stop and let it soak in.

Compacted soil is its own problem, and no watering schedule fixes it. Core aeration in late spring, when bermuda is growing hard, is the fix. It fits alongside the rest of the calendar in our lawn care schedule.

How to tell when bermuda actually needs water

Three field tests beat any timer.

The footprint test. Walk across the lawn and look back. Healthy hydrated blades spring back within a minute. If your footprints stay visible for several minutes, the grass has lost turgor and needs water within a day.

The color test. Bermuda under water stress takes on a dull blue-gray or smoky cast before it browns. That color shift is the earliest visible warning and it shows up in the driest part of the yard first, usually near pavement or on a south slope.

The screwdriver test. Push a long screwdriver into the lawn. It slides easily through moist soil and stops where the dry layer starts. After a proper watering it should go 6 inches or more without a fight. If it stops at 2 inches, you have been watering lightly, no matter how many minutes the timer says.

Rolled or folded blades are the last warning before dormancy. At that point the lawn is protecting itself, and one good soak the same week usually brings it back.

Signs you are watering too much

Overwatering bermuda is more common than underwatering, and it looks different from what people expect.

• Spongy, squishy footing hours after a watering, or standing water anywhere.
• Thatch building fast. Constant surface moisture speeds thatch accumulation, and thick thatch then repels water, which makes the problem worse.
• Fungus. Brown patch and dollar spot show up as circular discolored areas and are strongly associated with wet blades overnight.
• Weeds that like wet feet. Nutsedge, dollarweed, and moss in a sunny bermuda lawn all point to too much water.
• Shallow roots. Pull a plug and look. Bermuda roots should run well past 6 inches, and a mat of roots in the top 2 inches is a watering pattern problem.

Bermuda that is fed and watered hard also grows fast enough to need mowing twice a week at 0.75 to 2 inches. If mowing has become a chore, cutting back the water is the easier lever than cutting back the fertilizer.

Dormancy and winter watering

Bermuda goes dormant when soil temperatures fall below about 55°F, and dormant bermuda is tan, not dead. Watering it does not keep it green and it does not help it. Green-up in spring is driven by soil temperature, not moisture.

In a normal winter, shut the system off entirely. The one exception is a long dry, windy winter stretch with no rain for four to six weeks. In that case a single deep soak of about half an inch, applied midday when temperatures are above freezing, prevents desiccation of the crowns and rhizomes. That is once a month at most, not weekly.

Turn the system back on when the lawn starts showing green shoots in spring, and start at the cool-weather rate of about 0.7 inches per week rather than jumping straight to the summer schedule.

FAQ

How often should I water bermuda grass in summer?

Twice a week, deeply. In 85 to 95°F weather that is about 1.35 inches total for the week, split into two sessions three or four days apart. Daily watering in summer keeps the root system shallow and encourages disease, which leaves the lawn less able to handle the next hot spell rather than more.

How much water does bermuda grass need per week?

About 1 inch per week in ordinary warm weather, adjusted for temperature: roughly 0.7 inches in cool weather, 1.35 inches in heat, and 1.7 inches in a heat wave or high wind. Subtract any rainfall. Over 1,000 square feet, 1 inch works out to 623 gallons.

Can you overwater bermuda grass?

Yes, and it is the more common mistake. Signs include spongy ground, fast thatch buildup, fungal patches, nutsedge, and a shallow root mat in the top 2 inches. Bermuda tolerates drought far better than it tolerates constantly wet soil, so err on the dry side.

Should I water bermuda grass every day?

Only when it is brand new. Seed, sod, sprigs, and plugs all need light, frequent watering for the first two to three weeks while roots form. An established bermuda lawn should be watered once or twice a week, deeply, and never on a daily schedule.

Do I water bermuda grass in winter?

Almost never. Dormant bermuda uses very little water, and watering will not keep it green. The only exception is an unusually dry, windy winter, where one deep soak of about half an inch per month, applied on a mild day above freezing, protects the crowns from drying out.

What time of day is best to water bermuda?

Between 4 a.m. and 9 a.m. Early morning means low evaporation, better water pressure, and blades that dry by mid-morning, which cuts disease pressure. Evening is the worst choice because the canopy stays wet all night.

How long should I run my sprinklers on bermuda?

It depends entirely on your sprinkler output, so measure it with the can test: run 15 minutes, measure the depth in several cans, average them, and multiply by 4 for inches per hour. A head delivering 0.6 inches per hour needs about 68 minutes to apply 0.68 inches, which is one of two sessions in a hot week.