Pool season · Kentucky
Louisville Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Louisville 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.
The bar compresses Louisville's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 7–April 28 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 20. Wherever the today marker sits, the nearest color change is your next appointment.
The Louisville pool calendar
Opening — target April 14
Target April 14; the practical window runs April 7–April 28, and the 7-day mean crosses the 61°F threshold around April 28. Cold-water starts are the cheap ones.
Closing — deadline October 20
The window opens October 10 once water leaves the algae zone; the model deadline is October 20, a week ahead of the November 1 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Louisville'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 35° | 35° | 43° | 52° | 62° | 71° | 77° | 78° | 74° | 64° | 52° | 42° |
Warmest water typically August–August (peaking near 78°F); heaters and covers shift any month up.
Email me when Louisville hits the closing window
Data: NOAA 1991–2020 climate normals via Louisville Wfo (3.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.