Pool season · California
Vista Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Vista's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Vista's swim season; the hollow teal run before it (April 6 to April 27) is when to open; the hollow amber run after is when to close, with November 23 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Vista pool calendar
Opening — target April 13
Target April 13; the practical window runs April 6–April 27, and the 7-day mean crosses the 61°F threshold around April 27. Cold-water starts are the cheap ones.
Closing — deadline November 23
Hold the cover until November 13, then winterize by November 23, a week ahead of the January 7 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Vista'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 55° | 56° | 56° | 59° | 62° | 65° | 69° | 71° | 72° | 68° | 63° | 57° |
The curve peaks near 72°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Vista hits the closing window
Data: NOAA 1991–2020 climate normals via Vista (3.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.