Pool season · California
Compton Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Compton 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.
Each dot on the bar is one week of Compton'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 8–March 29), solid teal is swim season, and hollow amber is the closing window ending December 2. The black marker is today — its position against the colors is the entire executive summary.
The Compton pool calendar
Opening — target March 15
Target March 15; the practical window runs March 8–March 29, and the 7-day mean crosses the 61°F threshold around March 29. Cold-water starts are the cheap ones.
Closing — deadline December 2
The window opens November 22 once water leaves the algae zone; the model deadline is December 2, a week ahead of the January 5 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Compton'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 58° | 58° | 60° | 61° | 64° | 66° | 70° | 72° | 72° | 70° | 66° | 59° |
The curve peaks near 72°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Compton hits the closing window
Data: NOAA 1991–2020 climate normals via Hawthorne Municipal Airport (6.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.