Pool season · California
Hemet Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Hemet'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.
Hemet, CA — 163 swim days a yearThe bar compresses Hemet's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 26–April 16 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 18. Wherever the today marker sits, the nearest color change is your next appointment.
The Hemet pool calendar
Opening — target April 2
Target April 2; the practical window runs March 26–April 16, and the 7-day mean crosses the 61°F threshold around April 16. Cold-water starts are the cheap ones.
Closing — deadline November 18
Hold the cover until November 8, then winterize by November 18, a week ahead of the December 10 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Hemet'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52° | 53° | 56° | 60° | 64° | 70° | 77° | 80° | 79° | 72° | 63° | 54° |
Warmest water typically August–September (peaking near 81°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Hayward's pool season and Hesperia's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Hemet pool season FAQ
When should I open my pool in Hemet, CA?
Open by April 2 — the model places Hemet's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Hemet opening guide has the 12-step sequence.
When should I close my pool in Hemet?
Close by November 18: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Hemet closing guide sequences the work backward from that date.
How long is the swim season in Hemet?
Hemet averages 163 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 Hemet?
An unheated pool near Hemet typically peaks around 81°F in high summer and bottoms out near 52°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 Hemet hits the closing window
Data: NOAA 1991–2020 climate normals via San Jacinto (4.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.