Pool closing · Louisiana
When to Close Your Pool in Alexandria, LA: Deadline, Window & Checklist
Last updated: July 15, 2026 · Model window year: 2026 · dates · checklist · FAQ
Plan to close your Alexandria pool by November 13. The local 7-day mean temperature drops out of the algae-risk zone around November 3, and NOAA normals put the first 32°F freeze near November 27 — 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.
Alexandria closing dates at a glance
| Closing window | November 3 – November 13 |
|---|---|
| Close by (deadline) | November 13 |
| First freeze, 50% probability | November 27 |
| Open by (recommended) | March 10 |
| Opening window | March 3 – March 24 |
| 61°F crossing (7-day mean) | March 24 |
| Swim-season length (80°F+ days) | 163 days |
| NOAA normals station | Alexandria · 2.1 mi · 87 ft |
Alexandria's 163-day warm season leaves comfortable margins on both ends — the windows above aim you at the cheap-chemistry versions of each transition.
Four water checkpoints anchor Alexandria's year in the model: mid-April at about 65°F, mid-June at 79°F, mid-August near the 83°F peak zone, and mid-October easing through 70°F. The dates in the table are where those numbers cross the thresholds that matter.
The 12-step Alexandria 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
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
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
Clean media goes into storage, dirty media comes out worse: backwash the sand or DE, rinse the cartridges, all per the manual, before anything drains.
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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
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
Air through every line — skimmer, returns, cleaner — until each blows dry mist, plugging returns while the air still pushes. Nothing else on this list protects as much plumbing per minute.
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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
Doubt is the criterion: any run you can't confirm dry gets pool-grade antifreeze at the label's per-foot rate. The automotive jug from the garage is for cars — it has no business 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
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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Note this year's dates
Jot down when Alexandria's water actually cooled and when you closed. A two-line note beats memory next November 3 — your own yard runs a few days off any model, including ours.
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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.
What to buy before the rush
The November crowd empties shelves in a predictable order. This is the short list worth owning before Alexandria's window opens — nothing exotic, just the stuff everyone needs the same weekend.
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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.
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Winter closing kit
Closing chemistry in one box, dosed by pool volume.
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Air pillow
A soft target for the ice sheet, centered under the cover.
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Winter cover
The one purchase every other closing step depends on.
How Alexandria compares locally
Two nearby data points to triangulate with: Lafayette, 79 miles from Alexandria, models its close at November 20 (about a week later); Lake Charles, 87 miles out, at November 26. Alexandria's own window ends November 13. For the other half of the calendar see when to open in Alexandria, or scan the full year on the season page.
The instrument behind this page is Alexandria, 2.1 miles north of Alexandria — 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 Alexandria owners
Cold water is the whole point
A pool closed at 55°F barely changes all winter: algae are dormant, chemicals hold, and spring opens with a light dusting instead of a bloom. A pool closed at 72°F runs its own quiet ecosystem under the cover for a month. The date matters less than the water temperature it represents.
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.
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.
Alexandria 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 Alexandria, the 7-day mean drops through the threshold around November 3, so the window between then and November 13 is the sweet spot for a clean, stable close.
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 Alexandria's water cool through the mid-60s°F — around November 3 by our model — then close inside the window that ends November 13.
Do I need antifreeze in pool lines?
Only where water might remain. If every line is properly blown out and plugged, air is the antifreeze. Lines you can't verify dry — long runs, low spots, water features — get pool-grade antifreeze dosed per its label. With Alexandria's first freeze normal near November 27, don't leave that question open.
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?
Expect equipment damage first — cracked pump volutes, split filter tanks, ruptured heater exchangers — then plumbing leaks that surface at startup. In Alexandria, normals put the first freeze near November 27; everything after that date is borrowed time for an unwinterized system.
When is the last safe date to close in Alexandria?
Treat November 13 as the deadline in Alexandria. It's derived from the 1991–2020 normals: the cool-down plus ten days (the freeze normal, November 27, leaves room to spare). Weather varies year to year, so watch the 10-day forecast in late November — an early cold snap moves the real deadline, and the widget above flags exactly that.
Email me when Alexandria hits the closing window
Data: NOAA 1991–2020 climate normals via Alexandria (2.1 mi); live outlook by Open-Meteo. Full attribution on the sources page. Model assumptions and error bars on methodology.