Pool season · Washington
Yakima Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Yakima 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 Yakima's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 26–May 17 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 6. Wherever the today marker sits, the nearest color change is your next appointment.
The Yakima pool calendar
Opening — target May 3
Target May 3; the practical window runs April 26–May 17, and the 7-day mean crosses the 61°F threshold around May 17. Cold-water starts are the cheap ones.
Closing — deadline October 6
Hold the cover until September 26, then winterize by October 6, a week ahead of the October 23 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Yakima'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 32° | 36° | 43° | 49° | 57° | 64° | 71° | 75° | 70° | 59° | 46° | 35° |
The curve peaks near 75°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Yakima hits the closing window
Data: NOAA 1991–2020 climate normals via Yakima #2 (1.0 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.