Pool season · Oregon
Beaverton Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Beaverton'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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Beaverton's swim season; the hollow teal run before it (May 16 to June 6) is when to open; the hollow amber run after is when to close, with October 5 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Beaverton pool calendar
Opening — target May 23
Target May 23; the practical window runs May 16–June 6, and the 7-day mean crosses the 61°F threshold around June 6. Cold-water starts are the cheap ones.
Closing — deadline October 5
The window opens September 25 once water leaves the algae zone; the model deadline is October 5, a week ahead of the November 6 freeze normal.
Estimated water temperature by month
This is Beaverton'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 41° | 43° | 46° | 50° | 55° | 61° | 66° | 69° | 66° | 59° | 49° | 43° |
The curve peaks near 69°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Beaverton hits the closing window
Data: NOAA 1991–2020 climate normals via Beaverton 2 SSW (1.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.