Pool season · Florida
Jacksonville Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Jacksonville's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Each dot on the bar is one week of Jacksonville'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 2–February 23), solid teal is swim season, and hollow amber is the closing window ending December 12. The black marker is today — its position against the colors is the entire executive summary.
The Jacksonville pool calendar
Opening — target February 9
Target February 9; the practical window runs February 2–February 23, and the 7-day mean crosses the 61°F threshold around February 23. Cold-water starts are the cheap ones.
Closing — deadline December 12
Hold the cover until December 2, then winterize by December 12, a week ahead of the January 5 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Jacksonville's typical-year water curve: the same EWMA model as the live widget, run on the 1991–2020 normals instead of this week's weather.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 57° | 58° | 62° | 68° | 75° | 80° | 83° | 84° | 82° | 78° | 69° | 61° |
Warmest water typically June–October (peaking near 84°F); heaters and covers shift any month up.
Email me when Jacksonville hits the closing window
Data: NOAA 1991–2020 climate normals via Jacksonville NAS (6.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.