Pool season · Arizona
Gilbert Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Gilbert'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.
Each dot on the bar is one week of Gilbert'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 18–March 11), solid teal is swim season, and hollow amber is the closing window ending November 23. The black marker is today — its position against the colors is the entire executive summary.
The Gilbert pool calendar
Opening — target February 25
Open by February 25 — a two-week head start on the March 11 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 23
The window opens November 13 once water leaves the algae zone; the model deadline is November 23, a week ahead of the December 11 freeze normal.
Estimated water temperature by month
This is Gilbert'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52° | 55° | 59° | 66° | 73° | 83° | 90° | 91° | 88° | 79° | 66° | 55° |
Warmest water typically June–October (peaking near 92°F); heaters and covers shift any month up.
Email me when Gilbert hits the closing window
Data: NOAA 1991–2020 climate normals via Chandler Heights (8.1 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.