Pool season · California
Dublin Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Dublin 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.
The bar compresses Dublin's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 12–May 3 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 3. Wherever the today marker sits, the nearest color change is your next appointment.
The Dublin pool calendar
Opening — target April 19
Target April 19; the practical window runs April 12–May 3, and the 7-day mean crosses the 61°F threshold around May 3. Cold-water starts are the cheap ones.
Closing — deadline November 3
The window opens October 24 once water leaves the algae zone; the model deadline is November 3, a week ahead of the December 2 freeze normal.
Estimated water temperature by month
This is Dublin'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 47° | 49° | 53° | 56° | 61° | 66° | 72° | 73° | 72° | 67° | 58° | 50° |
The curve peaks near 73°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Dublin hits the closing window
Data: NOAA 1991–2020 climate normals via Livermore (4.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.