Pool season · North Carolina
Jacksonville Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Jacksonville 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 Jacksonville's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 20–April 10 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 5. Wherever the today marker sits, the nearest color change is your next appointment.
The Jacksonville pool calendar
Opening — target March 27
Target March 27; the practical window runs March 20–April 10, and the 7-day mean crosses the 61°F threshold around April 10. Cold-water starts are the cheap ones.
Closing — deadline November 5
Hold the cover until October 26, then winterize by November 5, a week ahead of the November 16 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Jacksonville'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 47° | 46° | 52° | 59° | 67° | 74° | 80° | 80° | 78° | 70° | 59° | 51° |
Warmest water typically July–September (peaking near 81°F); heaters and covers shift any month up.
Email me when Jacksonville hits the closing window
Data: NOAA 1991–2020 climate normals via New River Mcaf (2.1 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.