Pool season · Arizona
Tucson Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Tucson'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 Tucson's swim season; the hollow teal run before it (February 19 to March 12) is when to open; the hollow amber run after is when to close, with November 26 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Tucson pool calendar
Opening — target February 26
Target February 26; the practical window runs February 19–March 12, and the 7-day mean crosses the 61°F threshold around March 12. Cold-water starts are the cheap ones.
Closing — deadline November 26
Hold the cover until November 16, then winterize by November 26, a week ahead of the December 9 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Tucson'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 53° | 55° | 59° | 65° | 72° | 83° | 88° | 87° | 86° | 78° | 67° | 56° |
Warmest water typically June–October (peaking near 88°F); heaters and covers shift any month up.
Email me when Tucson hits the closing window
Data: NOAA 1991–2020 climate normals via Tucson International Airport (4.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.