Pool season · California
Visalia Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Visalia'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.
Visalia, CA — 151 swim days a yearThe bar compresses Visalia's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 28–April 18 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 6. Wherever the today marker sits, the nearest color change is your next appointment.
The Visalia pool calendar
Opening — target April 4
Target April 4; the practical window runs March 28–April 18, and the 7-day mean crosses the 61°F threshold around April 18. Cold-water starts are the cheap ones.
Closing — deadline November 6
Hold the cover until October 27, then winterize by November 6, a week ahead of the December 13 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Visalia'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 46° | 49° | 54° | 58° | 65° | 72° | 78° | 80° | 77° | 70° | 59° | 49° |
Warmest water typically July–August (peaking near 81°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Victorville's pool season and Vista's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Visalia pool season FAQ
When should I open my pool in Visalia, CA?
Open by April 4 — the model places Visalia's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Visalia opening guide has the 12-step sequence.
When should I close my pool in Visalia?
Close by November 6: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Visalia closing guide sequences the work backward from that date.
How long is the swim season in Visalia?
Visalia averages 151 days a year with normal highs of 80°F or better — right on the statewide median. The California season index ranks all 147 covered cities by the same metric.
How warm does pool water get in Visalia?
An unheated pool near Visalia typically peaks around 81°F in high summer and bottoms out near 46°F in winter, spending roughly 2 months at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Visalia hits the closing window
Data: NOAA 1991–2020 climate normals via Visalia (1.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.