Pool season · Arizona
Phoenix Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Phoenix's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
The bar compresses Phoenix's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the February 15–March 8 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 28. Wherever the today marker sits, the nearest color change is your next appointment.
The Phoenix pool calendar
Opening — target February 22
Open by February 22 — a two-week head start on the March 8 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 28
The window opens November 18 once water leaves the algae zone; the model deadline is November 28, a week ahead of the December 25 freeze normal.
Estimated water temperature by month
This is Phoenix'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 54° | 56° | 60° | 67° | 74° | 83° | 91° | 92° | 90° | 80° | 68° | 56° |
Warmest water typically June–October (peaking near 92°F); heaters and covers shift any month up.
Email me when Phoenix hits the closing window
Data: NOAA 1991–2020 climate normals via Phoenix Deer Valley Municipal Airport (8.0 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.