Pool season · Louisiana
Baton Rouge Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Baton Rouge's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Baton Rouge, LA — 173 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Baton Rouge's swim season; the hollow teal run before it (February 26 to March 19) is when to open; the hollow amber run after is when to close, with November 16 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Baton Rouge pool calendar
Opening — target March 5
Open by March 5 — a two-week head start on the March 19 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 16
The window opens November 6 once water leaves the algae zone; the model deadline is November 16, a week ahead of the November 26 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Baton Rouge'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 51° | 52° | 58° | 64° | 71° | 78° | 81° | 82° | 80° | 74° | 63° | 55° |
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 Alexandria's pool season and Hammond's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Louisiana season index.
Baton Rouge pool season FAQ
When should I open my pool in Baton Rouge, LA?
Target March 5. That date backs off two weeks from the day Baton Rouge's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Baton Rouge opening guide.
When should I close my pool in Baton Rouge?
The closing deadline is November 16 — late enough that the water has cooled out of the algae zone, early enough to beat Baton Rouge's first-freeze normal by about a week. See the Baton Rouge closing guide for the winterizing steps.
How long is the swim season in Baton Rouge?
Baton Rouge averages 173 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 Baton Rouge?
An unheated pool near Baton Rouge typically peaks around 82°F in high summer and bottoms out near 50°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 Baton Rouge hits the closing window
Data: NOAA 1991–2020 climate normals via Lsu Ben-hur Farm (5.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.