Pool season · California
Yuba City Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Yuba City'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 Yuba City's swim season; the hollow teal run before it (March 22 to April 12) is when to open; the hollow amber run after is when to close, with November 9 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Yuba City pool calendar
Opening — target March 29
Target March 29; the practical window runs March 22–April 12, and the 7-day mean crosses the 61°F threshold around April 12. Cold-water starts are the cheap ones.
Closing — deadline November 9
The window opens October 30 once water leaves the algae zone; the model deadline is November 9, a week ahead of the December 12 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Yuba City'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 48° | 51° | 55° | 59° | 66° | 73° | 79° | 81° | 78° | 71° | 60° | 51° |
Warmest water typically July–September (peaking near 81°F); heaters and covers shift any month up.
Email me when Yuba City hits the closing window
Data: NOAA 1991–2020 climate normals via Marysville (2.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.