Pool season · Utah
Sandy Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Sandy 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.
Sandy, UT — 95 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Sandy's swim season; the hollow teal run before it (April 30 to May 21) is when to open; the hollow amber run after is when to close, with October 10 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Sandy pool calendar
Opening — target May 7
Open by May 7 — a two-week head start on the May 21 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 10
The window opens September 30 once water leaves the algae zone; the model deadline is October 10, a week ahead of the October 22 freeze normal.
Estimated water temperature by month
This is Sandy'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 30° | 32° | 40° | 47° | 55° | 65° | 76° | 79° | 73° | 61° | 47° | 34° |
Warmest water typically August–August (peaking near 80°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Salt Lake City's pool season and South Jordan's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Utah season index.
Sandy pool season FAQ
When should I open my pool in Sandy, UT?
Target May 7. That date backs off two weeks from the day Sandy's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Sandy opening guide.
When should I close my pool in Sandy?
The closing deadline is October 10 — late enough that the water has cooled out of the algae zone, early enough to beat Sandy's first-freeze normal by about a week. See the Sandy closing guide for the winterizing steps.
How long is the swim season in Sandy?
Sandy averages 95 days a year with normal highs of 80°F or better — about 5 days later than the Utah median. The Utah season index ranks all 12 covered cities by the same metric.
How warm does pool water get in Sandy?
An unheated pool near Sandy typically peaks around 80°F in high summer and bottoms out near 30°F in winter, spending roughly 1 month 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 Sandy hits the closing window
Data: NOAA 1991–2020 climate normals via Cottonwood Weir (4.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.