Pool season · California
Madera Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Madera'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 Madera'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 31–April 21), solid teal is swim season, and hollow amber is the closing window ending November 2. The black marker is today — its position against the colors is the entire executive summary.
The Madera pool calendar
Opening — target April 7
Open by April 7 — a two-week head start on the April 21 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 2
Hold the cover until October 23, then winterize by November 2, a week ahead of the November 27 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Madera'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 45° | 48° | 53° | 58° | 64° | 72° | 78° | 80° | 77° | 69° | 58° | 48° |
Warmest water typically July–August (peaking near 80°F); heaters and covers shift any month up.
Email me when Madera hits the closing window
Data: NOAA 1991–2020 climate normals via Madera (2.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.