Pool season · California
Porterville Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Porterville's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
The bar compresses Porterville's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 15–April 5 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 11. Wherever the today marker sits, the nearest color change is your next appointment.
The Porterville pool calendar
Opening — target March 22
Open by March 22 — a two-week head start on the April 5 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 11
The window opens November 1 once water leaves the algae zone; the model deadline is November 11, a week ahead of the December 13 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Porterville'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° | 52° | 56° | 61° | 67° | 74° | 81° | 83° | 80° | 73° | 61° | 52° |
Warmest water typically July–September (peaking near 84°F); heaters and covers shift any month up.
Email me when Porterville hits the closing window
Data: NOAA 1991–2020 climate normals via Porterville (0.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.