Pool closing · Texas
When to Close Your Pool in El Paso, TX: Deadline, Window & Checklist
Last updated: July 15, 2026 · Model window year: 2026 · dates · checklist · FAQ
Plan to close your El Paso pool by November 9. The local 7-day mean temperature drops out of the algae-risk zone around October 30, and NOAA normals put the first 32°F freeze near November 20 — winterize between those dates and the water goes under the cover cold, clean, and easy to reopen. Below: today's water estimate, the full closing window, and a step-by-step winterizing checklist.
El Paso closing dates at a glance
| Closing window | October 30 – November 9 |
|---|---|
| Close by (deadline) | November 9 |
| First freeze, 50% probability | November 20 |
| Open by (recommended) | March 11 |
| Opening window | March 4 – March 25 |
| 61°F crossing (7-day mean) | March 25 |
| Swim-season length (80°F+ days) | 183 days |
| NOAA normals station | El Paso International Airport · 4.0 mi · 3918 ft |
Closing is close to optional here — many El Paso owners trade the cover for shorter pump hours and swim the shoulder seasons. If you do close, the late window above still applies.
At roughly 3918 ft, El Paso International Airport runs cooler than lowland forecasts for the same region — trust these local numbers over metro-wide weather graphics.
The same model in water terms: El Paso's estimated pool temperature runs about 65°F in mid-April, 83°F in mid-June, 84°F in mid-August, and 69°F in mid-October, peaking near 85°F. Those four checkpoints — not any calendar holiday — are what the windows above are protecting.
The 12-step El Paso winterizing checklist
Sequenced against El Paso's October 30–November 9 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
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
Leave nothing organic behind: skim the surface, brush every wall and step, vacuum the floor slowly. What goes under the cover dirty comes out worse — winter only ever compounds what it's given.
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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
Add a winterizing kit or your usual closing chemicals exactly as their labels direct for your volume, with the pump still circulating so everything distributes before shutdown.
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Lower the water level
Take the level down only as far as the cover's manual says — usually just below the skimmer for solid covers, higher for many mesh systems. An empty pool is never the goal; shells crack and shift without water's weight.
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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
Seat a skimmer guard or bottle in the throat — ice that forms there needs a sacrifice, and a two-dollar bottle beats a plumbing repair under the deck.
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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
Center an inflated air pillow, then fit the cover and secure it with water bags, cable, or straps as designed. The pillow gives ice a place to push besides your walls.
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Calendar the off-season checks
Set a monthly reminder from November 9 to spring: check cover tension, pump off standing water, and glance at the water level. Fifteen minutes a month protects the whole closing job.
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Stage the cover pump
Solid covers need drainage all winter: set a cover pump or siphon before the first storm, not after. Standing water strains seams and invites a mid-winter emergency.
What to buy before the rush
The October crowd empties shelves in a predictable order. This is the short list worth owning before El Paso's window opens — nothing exotic, just the stuff everyone needs the same weekend.
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Winter closing kit
Closing chemistry in one box, dosed by pool volume.
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Air pillow
Gives ice somewhere to push besides your pool walls.
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Winter cover
Measure with overlap; the winter workhorse over everything else.
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Cover pump
Solid covers collect rain all winter; this is the drainage plan.
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Expansion plugs + skimmer guard
Seals blown-out lines and sacrifices itself to skimmer ice.
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Pool antifreeze
Pool-rated glycol for the lines air couldn't clear.
How El Paso compares locally
El Paso closes in the later half of Texas's calendar. Neighbors run close: Las Cruces (39 mi away) models its deadline at November 2 (about a week earlier vs El Paso's November 9), while Albuquerque (225 mi) shows October 13. The spring mirror of this page is the El Paso opening guide, and the season overview draws both windows on a single bar.
The instrument behind this page is El Paso International Airport, 4.0 miles southeast of El Paso — 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 El Paso owners
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.
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.
Leaf season vs closing day
If your yard drops serious leaves, the cheap trick is a leaf net over the main cover through the drop, then one bulk removal before snow. Leaves that winter on (or worse, under) the cover steep like tea and hand you stained water and clogged pumps in spring.
The case for a shorter off-season
El Paso's climate leaves water usable well past most owners' patience. If the family still swims in November, don't rush the cover — the model window runs to November 9 for a reason. Closing late and cold beats closing early and warm in every spring-condition metric that matters.
Closing at 3918 feet
High-elevation autumns lie: El Paso afternoons can feel like swim weather the same week a clear night dips below 32°F. The defense is preparation — blowout gear staged early, the November 20 freeze normal taken literally, and any dry cold front in November treated as the starting gun rather than a curiosity.
El Paso pool closing FAQ
What temperature should water be to close a pool?
Close once water holds below about 65°F — the point where algae go mostly dormant — and before hard freezes. In El Paso, the 7-day mean drops through the threshold around October 30, so the window between then and November 9 is the sweet spot for a clean, stable close.
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. El Paso's water isn't reliably out of that zone until about October 30 — the calendar's first cold weekend doesn't change that.
Do I need antifreeze in pool lines?
Treat antifreeze as a backup, not a substitute: the real protection is air in dry lines. Where a full blowout isn't possible, pool-grade antifreeze per label is cheap insurance against a cracked pipe — worth it anywhere freezes are routine, and El Paso sees them from about November 20.
How far should I drain my pool for winter?
Less than most people think. Below the skimmer opening is the classic solid-cover target; mesh covers often specify higher water. The cover's own manual wins every argument, and "drain it completely" is never the answer — empty shells pop out of wet ground.
What happens if you don't winterize a pool?
The freeze finds every shortcut. Ice in an unprotected pump or heater cracks castings from the inside; ice in underground lines splits fittings you can't see until spring. El Paso reaches freeze territory around November 20 — the checklist above is cheaper than any one of those repairs.
When is the last safe date to close in El Paso?
November 9, by our model — the cool-down plus ten days (the freeze normal, November 20, leaves room to spare). Later closes happen, but they happen in gloves. The winterizing steps above take a weekend; leave yourself at least that much runway before El Paso's first freeze-risk stretch.
Email me when El Paso hits the closing window
Data: NOAA 1991–2020 climate normals via El Paso International Airport (4.0 mi); live outlook by Open-Meteo. Full attribution on the sources page. Model assumptions and error bars on methodology.