Pool closing · Louisiana
When to Close Your Pool in Houma, LA: Deadline, Window & Checklist
Last updated: July 15, 2026 · Model window year: 2026 · dates · checklist · FAQ
Target November 28 as the practical closing deadline in Houma. Our model of NOAA 1991–2020 normals keeps the 7-day mean above 61°F until November 18; after that, cooling water winds algae down while you work the checklist below. The hard stop is equipment freeze damage — normals put Houma's first 32°F night near December 17.
Houma closing dates at a glance
| Closing window | November 18 – November 28 |
|---|---|
| Close by (deadline) | November 28 |
| First freeze, 50% probability | December 17 |
| Open by (recommended) | February 17 |
| Opening window | February 10 – March 3 |
| 61°F crossing (7-day mean) | March 3 |
| Swim-season length (80°F+ days) | 181 days |
| NOAA normals station | Houma · 7.8 mi · 8 ft |
Closing is close to optional here — many Houma owners trade the cover for shorter pump hours and swim the shoulder seasons. If you do close, the late window above still applies.
Put dates aside and follow the water: the Houma curve says roughly 68°F by mid-April, 81°F by mid-June, 83°F in mid-August, then back down through 74°F in mid-October. The summer ceiling sits near 83°F, and every window above is just a line drawn on this curve.
The 12-step Houma winterizing checklist
The order matters more than the date: balanced water first, verified-dry lines before anything else freezes-proofs, and the cover only after everything below it is done. Work the list inside the window above.
-
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.
-
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.
-
Service the filter one last time
Backwash sand or DE, or pull and rinse cartridges, per the manual. A filter stored dirty cakes over winter and starts spring half-clogged.
-
Apply winter chemicals per label
Winter chemicals go in before shutdown, not after: label-dosed, circulated for a few hours, distributed evenly. A floater dropped on still water protects one corner.
-
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.
-
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.
-
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.
-
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.
-
Drain the equipment
Open the drains on everything that holds water and let the pad empty completely. Cartridges and small equipment overwinter far better on a garage shelf than outside.
-
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.
-
Calendar the off-season checks
Set a monthly reminder from November 28 to spring: check cover tension, pump off standing water, and glance at the water level. Fifteen minutes a month protects the whole closing job.
-
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 November crowd empties shelves in a predictable order. This is the short list worth owning before Houma's window opens — nothing exotic, just the stuff everyone needs the same weekend.
-
Winter closing kit
Season-length winter chemicals in one label-dosed box.
-
Air pillow
Centers under the cover so ice pushes inward, not outward.
-
Winter cover
The one purchase every other closing step depends on.
-
Cover pump
Standing water is a cover killer; this is the counter.
-
Expansion plugs + skimmer guard
The blowout's finishing move — one per return, one for the skimmer.
-
Pool antifreeze
Pool-rated glycol for the lines air couldn't clear.
How Houma compares locally
Statewide context: across the 13 Louisiana cities we model, Houma's November 28 deadline sits in the earliest quarter. Nearby, Kenner (40 mi) closes around November 30 and Metairie (43 mi) around November 30 — treat gaps under a week as microclimate noise, not strategy. Spring planning restarts at the opening guide; the Houma pool season page keeps the whole year in one view.
The instrument behind this page is Houma, 7.8 miles northwest of Houma — 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 Houma owners
Salt cells overwinter indoors
Remove the cell at closing, inspect and clean per the manufacturer, and store it inside with the unions capped. A dummy cell or spacer keeps the plumbing sealed. Cells left in outdoor plumbing through freezes are a common — and completely avoidable — spring casualty.
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 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 case for a shorter off-season
Houma'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 28 for a reason. Closing late and cold beats closing early and warm in every spring-condition metric that matters.
Houma 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 Houma's actual water; the normals say the durable cool-down arrives near November 18, and anything inside the window to November 28 closes clean.
Can you close a pool too early?
Absolutely. A pool closed warm is an algae incubator: no circulation, fading sanitizer, and weeks of growth-friendly temperatures. Houma's water doesn't settle below the risk zone until around November 18 — closing much before that trades a few weekends of maintenance for a rough spring.
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 Houma, so let the live forecast, not a calendar, tell you when freeze protection starts mattering.
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?
In a freeze climate, physics wins: water expands about 9% when it freezes, cracking pump housings, filter tanks, heat exchangers, and pipes. With Houma's first 32°F night arriving near December 17 in the normals, an unwinterized pad is a spring repair bill waiting to be discovered.
When is the last safe date to close in Houma?
November 28, by our model — the cool-down plus ten days (the freeze normal, December 17, 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 Houma's first freeze-risk stretch.
Email me when Houma hits the closing window
Data: NOAA 1991–2020 climate normals via Houma (7.8 mi); live outlook by Open-Meteo. Full attribution on the sources page. Model assumptions and error bars on methodology.