Pool season · California
West Covina Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
West Covina'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.
Each dot on the bar is one week of West Covina's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (March 7–March 28), solid teal is swim season, and hollow amber is the closing window ending November 23. The black marker is today — its position against the colors is the entire executive summary.
The West Covina pool calendar
Opening — target March 14
Target March 14; the practical window runs March 7–March 28, and the 7-day mean crosses the 61°F threshold around March 28. Cold-water starts are the cheap ones.
Closing — deadline November 23
The window opens November 13 once water leaves the algae zone; the model deadline is November 23, a week ahead of the December 28 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on West Covina'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 55° | 56° | 58° | 61° | 65° | 68° | 74° | 77° | 77° | 71° | 64° | 56° |
The curve peaks near 78°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when West Covina hits the closing window
Data: NOAA 1991–2020 climate normals via Pomona/fairplex (8.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.