Pool closing · Texas
When to Close Your Pool in Fort Worth, TX: Deadline, Window & Checklist
Last updated: July 15, 2026 · Model window year: 2026 · dates · checklist · FAQ
Target November 14 as the practical closing deadline in Fort Worth. Our model of NOAA 1991–2020 normals keeps the 7-day mean above 61°F until November 4; after that, cooling water winds algae down while you work the checklist below. The hard stop is equipment freeze damage — normals put Fort Worth's first 32°F night near November 24.
Fort Worth closing dates at a glance
| Closing window | November 4 – November 14 |
|---|---|
| Close by (deadline) | November 14 |
| First freeze, 50% probability | November 24 |
| Open by (recommended) | March 7 |
| Opening window | February 28 – March 21 |
| 61°F crossing (7-day mean) | March 21 |
| Swim-season length (80°F+ days) | 174 days |
| NOAA normals station | Ft Worth Meacham Field Naaf · 2.4 mi · 705 ft |
Fort Worth's 174-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 Fort Worth curve says roughly 66°F by mid-April, 82°F by mid-June, 87°F in mid-August, then back down through 72°F in mid-October. The summer ceiling sits near 87°F, and every window above is just a line drawn on this curve.
The 12-step Fort Worth winterizing checklist
Sequenced against Fort Worth's November 4–November 14 window: chemistry while the pump still runs, blowouts before the equipment drains, cover last. Labels dictate every dose.
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Balance the water a few days ahead
Do the chemistry midweek, close on the weekend: alkalinity and pH into label ranges with days of circulation left to spread them. Winter locks in whatever state the water holds on closing day.
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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
Check the cover manufacturer's spec before touching the hose: solid covers typically want water below the skimmer mouth, mesh often barely lower than normal. Full draining is off the table entirely.
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Blow out the lines and plug returns
The blowout is the whole ballgame: drive air through each line until it runs dry, seat the plug against the airflow, move to the next. A dry line cannot burst, full stop.
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Protect the skimmer
Install a skimmer guard bottle (or a plug rated for your skimmer) so ice that forms there crushes the sacrificial piece instead of cracking the skimmer body.
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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
Nothing on the pad should hold water overnight: pull the drain plugs from pump, filter, heater, and feeder, stash them all in the pump basket, and carry the portable pieces indoors.
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Set the air pillow and cover
Inflate the pillow to about two-thirds, center it, then bring the cover over and secure it per its design. Under ice, that soft dome is the difference between inward compression and outward wall pressure.
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Store chemicals properly
Seal opened containers, keep oxidizers and acids separated, and store everything cool, dry, and locked away from kids and pets — exactly as each label describes.
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Calendar the off-season checks
Set a monthly reminder from November 14 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
Every item below sells out somewhere in Texas every November. Stocking the short list before the rush costs nothing extra and saves the mid-project store run — the chemicals guide explains what each category actually does.
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Air pillow
Centers under the cover so ice pushes inward, not outward.
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Winter cover
The one purchase every other closing step depends on.
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Cover pump
Keeps rain and melt off a solid cover all season.
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Expansion plugs + skimmer guard
Cheap rubber that stands between ice and your fittings.
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Pool antifreeze
Backup for unverifiable lines; label rate per foot of pipe.
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Winter closing kit
Closing chemistry in one box, dosed by pool volume.
How Fort Worth compares locally
Statewide context: across the 68 Texas cities we model, Fort Worth's November 14 deadline sits in the earlier half. Nearby, North Richland Hills (9 mi) closes around November 9 and Arlington (14 mi) around November 12 — treat gaps under a week as microclimate noise, not strategy. Spring planning restarts at the opening guide; the Fort Worth pool season page keeps the whole year in one view.
The instrument behind this page is Ft Worth Meacham Field Naaf, 2.4 miles north of Fort Worth — the closest station publishing complete 1991–2020 daily temperature normals. Thirty years of its readings set every date above; your own yard adds or subtracts a degree with shade, wind, and pavement, which is what the window's width is for.
Field notes for Fort Worth 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 mesh-cover spring surprise, prevented in fall
Mesh-covered pools green up early because late-winter sun plus nutrient-carrying meltwater reaches the water. The fall counter-moves: close late and cold, dose the winter kit exactly per label, and plan an early-spring peek under the cover rather than a Memorial Day reveal.
The fifteen-minute monthly walk-around
Once a month all winter: pump or siphon standing water off solid covers, re-tension straps or top up water bags, confirm the level hasn't dropped enough to strand the cover, and glance at the pad for critter nests. Every major cover failure starts as a skipped walk-around.
Fort Worth 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 Fort Worth's actual water; the normals say the durable cool-down arrives near November 4, and anything inside the window to November 14 closes clean.
Can you close a pool too early?
You can, and warm-water closings are why "we opened to a swamp" stories exist. The fix is patience: let Fort Worth's water cool through the mid-60s°F — around November 4 by our model — then close inside the window that ends November 14.
Do I need antifreeze in pool lines?
Only for lines you can't verify dry — a proper blowout makes antifreeze unnecessary. Where doubt remains, use pool-grade product at its label rate, never automotive. No freeze-probability normal is published near Fort Worth, so let the live forecast, not a calendar, tell you when freeze protection starts mattering.
How far should I drain my pool for winter?
As far as your cover manufacturer specifies and no farther — typically a few inches below the skimmer mouth for solid covers, near normal level for many mesh systems with skimmer plugs. Never drain fully: an empty shell can shift or crack under groundwater pressure.
What happens if you don't winterize a pool?
In a freeze climate, physics wins: water expands about 9% when it freezes, cracking pump housings, filter tanks, heat exchangers, and pipes. With Fort Worth's first 32°F night arriving near November 24 in the normals, an unwinterized pad is a spring repair bill waiting to be discovered.
When is the last safe date to close in Fort Worth?
The model draws the line at November 14 for Fort Worth. It isn't arbitrary: the cool-down plus ten days (the freeze normal, November 24, leaves room to spare), and the whole closing sequence needs a working weekend of margin. The one exception that overrides any date — a hard freeze inside the 10-day forecast, which the widget above flags as urgent.
Email me when Fort Worth hits the closing window
Data: NOAA 1991–2020 climate normals via Ft Worth Meacham Field Naaf (2.4 mi); live outlook by Open-Meteo. Full attribution on the sources page. Model assumptions and error bars on methodology.