Pool season · Arizona
Maricopa Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Maricopa pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Maricopa, AZ — 241 swim days a yearThe bar compresses Maricopa's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the February 18–March 11 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 17. Wherever the today marker sits, the nearest color change is your next appointment.
The Maricopa 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 17
The window opens November 14 once water leaves the algae zone; the model deadline is November 17, a week ahead of the November 24 freeze normal.
Estimated water temperature by month
This is Maricopa'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° | 74° | 84° | 92° | 93° | 90° | 79° | 66° | 55° |
Warmest water typically June–October (peaking near 94°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Goodyear's pool season and Mesa's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Arizona season index.
Maricopa pool season FAQ
When should I open my pool in Maricopa, AZ?
Open by February 25 — the model places Maricopa's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Maricopa opening guide has the 12-step sequence.
When should I close my pool in Maricopa?
Close by November 17: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Maricopa closing guide sequences the work backward from that date.
How long is the swim season in Maricopa?
Maricopa averages 241 days a year with normal highs of 80°F or better — right on the statewide median. The Arizona season index ranks all 20 covered cities by the same metric.
How warm does pool water get in Maricopa?
An unheated pool near Maricopa typically peaks around 94°F in high summer and bottoms out near 51°F in winter, spending roughly 5 months at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Maricopa hits the closing window
Data: NOAA 1991–2020 climate normals via Maricopa 4 N (5.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.