Pool closing · Texas
When to Close Your Pool in Wichita Falls, TX: Deadline, Window & Checklist
Last updated: July 15, 2026 · Model window year: 2026 · dates · checklist · FAQ
Target November 2 as the practical closing deadline in Wichita Falls. Our model of NOAA 1991–2020 normals keeps the 7-day mean above 61°F until October 25; after that, cooling water winds algae down while you work the checklist below. The hard stop is equipment freeze damage — normals put Wichita Falls's first 32°F night near November 9.
Wichita Falls closing dates at a glance
| Closing window | October 25 – November 2 |
|---|---|
| Close by (deadline) | November 2 |
| First freeze, 50% probability | November 9 |
| Open by (recommended) | March 25 |
| Opening window | March 18 – April 8 |
| 61°F crossing (7-day mean) | April 8 |
| Swim-season length (80°F+ days) | 159 days |
| NOAA normals station | Wichita Falls Municipal Airport · 5.3 mi · 1017 ft |
Wichita Falls's 159-day warm season leaves comfortable margins on both ends — the windows above aim you at the cheap-chemistry versions of each transition.
Put dates aside and follow the water: the Wichita Falls curve says roughly 61°F by mid-April, 79°F by mid-June, 85°F in mid-August, then back down through 68°F in mid-October. The summer ceiling sits near 85°F, and every window above is just a line drawn on this curve.
The 12-step Wichita Falls winterizing checklist
A closing is a plumbing project with a chemistry warm-up. Start a few days ahead of your target date, keep every dose per its product label, and don't skip the photographs — spring-you reassembles from them.
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Balance the water a few days ahead
Three or four days before closing, adjust alkalinity and pH into label ranges. Balanced water is gentler on the liner, plaster, and equipment through the long covered months ahead.
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Deep-clean the pool
Brush, skim, and vacuum like company's coming. A pool that goes under the cover spotless comes out needing a rinse; one that goes under dirty comes out needing a project.
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Service the filter one last time
One final filter service per the manual — cartridges rinsed and stored dry indoors, sand or DE backwashed. Winter turns trapped gunk into concrete.
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Apply winter chemicals per label
Run the winter kit through moving water: dose each product per its label with the pump on, give it a few hours to distribute, then start the shutdown. Chemistry added to still water stays where it lands.
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Lower the water level
Your cover's manual sets the number — commonly a few inches under the skimmer for solid covers, barely below normal for mesh. Stop there. The remaining water isn't laziness; it's ballast holding the shell in the ground.
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Blow out the lines and plug returns
Work line by line: push air until the return spits dry mist, plug it against the flowing air, move on. Skimmer, returns, cleaner line, in whatever order your plumbing prefers — dry pipes are the entire point of closing.
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Protect the skimmer
The skimmer throat is where trapped water has no escape — park a guard bottle or rated plug in it and let ice crush the cheap part.
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Add pool antifreeze where blowouts fall short
If any line can't be verified dry, add pool-grade antifreeze per its label. Use only pool antifreeze — automotive products don't belong in pool plumbing.
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Drain the equipment
Open every drain plug on the pump, filter, heater, and chlorinator, and store the plugs in the pump basket so spring reassembly is a one-stop hunt. Move what you can indoors.
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Set the air pillow and cover
Float a centered air pillow, then land the cover and secure it the way its design intends — bags, cable, or straps. Ice sheets need somewhere to collapse inward, and the pillow is that somewhere.
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Winterize the water features
Waterfalls, slides, and spillover spas hold water in places gravity won't clear — blow those lines separately and plug them, or they'll be the one crack you find in spring.
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Calendar the off-season checks
Set a monthly reminder from November 2 to spring: check cover tension, pump off standing water, and glance at the water level. Fifteen minutes a month protects the whole closing job.
What to buy before the rush
A small stack of supplies turns the checklist above into a single-weekend job. Buy before Wichita Falls's October rush and the whole list ships at leisure instead of sprinting.
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Winter closing kit
The under-the-cover chemistry, measured for your gallons.
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Air pillow
Centers under the cover so ice pushes inward, not outward.
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Winter cover
Measure with overlap; the winter workhorse over everything else.
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Cover pump
Keeps rain and melt off a solid cover all season.
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Expansion plugs + skimmer guard
The blowout's finishing move — one per return, one for the skimmer.
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Pool antifreeze
For lines you can't verify dry — pool-grade only, per label.
How Wichita Falls compares locally
Wichita Falls closes in the latest quarter of Texas's calendar. Neighbors run close: Lawton (49 mi away) models its deadline at October 31 (2 days earlier vs Wichita Falls's November 2), while Denton (93 mi) shows November 9. The spring mirror of this page is the Wichita Falls opening guide, and the season overview draws both windows on a single bar.
Local means local: Wichita Falls's dates come from Wichita Falls Municipal Airport, the nearest station with complete daily temperature normals — 5.3 miles northeast, about 1017 feet up. Between that station and a Wichita County backyard there's always a degree or two of microclimate; the windows are built wide enough to carry it.
Field notes for Wichita Falls owners
Match the drainage plan to the cover
Solid covers shed nothing — they need a cover pump staged before the first storm and checked after each one. Mesh covers drain themselves but pass silt that settles all winter. Either way, the plan is decided in October, not improvised in January when the cover is an ice sheet.
The skimmer is the most breakable part you own
Skimmer bodies crack because water freezes inside the throat with nowhere to push. A sacrificial bottle or spring-loaded guard absorbs that expansion for a few dollars. It's the highest-return item in the entire closing kit relative to what it protects.
The warm spell after you closed
A 78°F week in October doesn't mean reopening. Water under an opaque cover warms far less than air suggests, and a closed, balanced pool tolerates a warm stretch fine. Check the cover pump has somewhere to send rain, enjoy the weather, and leave the plumbing sealed.
Wichita Falls pool closing FAQ
What temperature should water be to close a pool?
Cold enough that biology has clocked out — below 65°F and falling, ideally low 60s. The widget above tracks Wichita Falls's actual water; the normals say the durable cool-down arrives near October 25, and anything inside the window to November 2 closes clean.
Can you close a pool too early?
Early closing is the mistake the whole model is built to prevent from the other direction. A cover installed over 70°F water is a terrarium: sanitizer decays, algae compound, nobody looks for months. Wichita Falls's water isn't reliably out of that zone until about October 25 — the calendar's first cold weekend doesn't change that.
Do I need antifreeze in pool lines?
It depends entirely on your confidence in the blowout. Lines that blew fully dry need nothing; anything uncertain — low runs, water features, a stubborn cleaner line — gets pool-grade antifreeze at the label's rate per foot. With Wichita Falls's freeze clock starting near November 9, uncertainty is the thing to eliminate.
How far should I drain my pool for winter?
Follow the cover's instructions first: solid covers usually want water a few inches below the skimmer; some mesh setups run higher with the skimmer sealed. The hard rule is never empty — hydrostatic pressure can lift or crack an empty pool, a far worse outcome than any freeze.
What happens if you don't winterize a pool?
The repair list writes itself in order of cost: heater heat exchanger, pump housing, filter tank, then every fitting the ice reached — discovered one leak at a time in spring. Around Wichita Falls the exposure begins near November 9, and each skipped checklist step above is one more candidate for that list.
When is the last safe date to close in Wichita Falls?
November 2, by our model — a week of margin before the November 9 first-freeze normal. Later closes happen, but they happen in gloves. The winterizing steps above take a weekend; leave yourself at least that much runway before Wichita Falls's first freeze-risk stretch.
Email me when Wichita Falls hits the closing window
Data: NOAA 1991–2020 climate normals via Wichita Falls Municipal Airport (5.3 mi); live outlook by Open-Meteo. Full attribution on the sources page. Model assumptions and error bars on methodology.