Pool season · Louisiana
Slidell Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Slidell pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Slidell, LA — 164 swim days a yearEach dot on the bar is one week of Slidell's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (February 24–March 17), solid teal is swim season, and hollow amber is the closing window ending November 19. The black marker is today — its position against the colors is the entire executive summary.
The Slidell pool calendar
Opening — target March 3
Target March 3; the practical window runs February 24–March 17, and the 7-day mean crosses the 61°F threshold around March 17. Cold-water starts are the cheap ones.
Closing — deadline November 19
Hold the cover until November 9, then winterize by November 19, a week ahead of the December 1 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Slidell's own normals — the shape of a typical year, not a forecast. The widget above shows where the current year actually sits.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52° | 52° | 58° | 64° | 71° | 78° | 81° | 82° | 80° | 74° | 64° | 56° |
Warmest water typically June–September (peaking near 82°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Shreveport's pool season and Alexandria's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Louisiana season index.
Slidell pool season FAQ
When should I open my pool in Slidell, LA?
The site model recommends opening by March 3 — about two weeks before Slidell's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Slidell opening guide.
When should I close my pool in Slidell?
Winterize by November 19. The model holds the deadline a week ahead of Slidell's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Slidell closing guide.
How long is the swim season in Slidell?
Slidell averages 164 days a year with normal highs of 80°F or better — right on the statewide median. The Louisiana season index ranks all 13 covered cities by the same metric.
How warm does pool water get in Slidell?
An unheated pool near Slidell typically peaks around 82°F in high summer and bottoms out near 51°F in winter, spending roughly 4 months at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Slidell hits the closing window
Data: NOAA 1991–2020 climate normals via Slidell (1.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.