Pool season · California
Mountain View Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Mountain View 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.
The bar compresses Mountain View's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 16–May 7 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 7. Wherever the today marker sits, the nearest color change is your next appointment.
The Mountain View pool calendar
Opening — target April 23
Target April 23; the practical window runs April 16–May 7, and the 7-day mean crosses the 61°F threshold around May 7. Cold-water starts are the cheap ones.
Closing — deadline November 7
The window opens October 28 once water leaves the algae zone; the model deadline is November 7, a week ahead of the December 23 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Mountain View's own normals — the shape of a typical year, not a forecast. The widget above shows where the current year actually sits.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 50° | 52° | 55° | 57° | 60° | 64° | 67° | 68° | 68° | 66° | 60° | 52° |
The curve peaks near 68°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Mountain View hits the closing window
Data: NOAA 1991–2020 climate normals via Moffett Federal Airfield (1.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.