Pool season · Oregon
Eugene Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Eugene'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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Eugene's swim season; the hollow teal run before it (May 28 to June 18) is when to open; the hollow amber run after is when to close, with October 3 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Eugene pool calendar
Opening — target June 4
Target June 4; the practical window runs May 28–June 18, and the 7-day mean crosses the 61°F threshold around June 18. Cold-water starts are the cheap ones.
Closing — deadline October 3
The window opens September 23 once water leaves the algae zone; the model deadline is October 3, a week ahead of the October 23 freeze normal.
Estimated water temperature by month
This is Eugene'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° | 42° | 45° | 49° | 54° | 58° | 65° | 69° | 66° | 58° | 49° | 42° |
The curve peaks near 69°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Eugene hits the closing window
Data: NOAA 1991–2020 climate normals via Eugene Mahlon Sweet Airport (7.1 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.