Pool season · North Carolina
Cary Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Cary'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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Cary's swim season; the hollow teal run before it (March 31 to April 21) is when to open; the hollow amber run after is when to close, with October 24 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Cary pool calendar
Opening — target April 7
Target April 7; the practical window runs March 31–April 21, and the 7-day mean crosses the 61°F threshold around April 21. Cold-water starts are the cheap ones.
Closing — deadline October 24
Hold the cover until October 14, then winterize by October 24, a week ahead of the November 8 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Cary'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 42° | 42° | 47° | 56° | 64° | 72° | 78° | 79° | 75° | 66° | 55° | 47° |
Warmest water typically July–August (peaking near 79°F); heaters and covers shift any month up.
Email me when Cary hits the closing window
Data: NOAA 1991–2020 climate normals via Apex (2.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.