Pool season · Oregon
Medford Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Medford 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.
Medford, OR — 109 swim days a yearThe bar compresses Medford's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 27–May 18 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 14. Wherever the today marker sits, the nearest color change is your next appointment.
The Medford pool calendar
Opening — target May 4
Open by May 4 — a two-week head start on the May 18 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 14
Hold the cover until October 4, then winterize by October 14, a week ahead of the October 29 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Medford'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 39° | 42° | 46° | 50° | 57° | 64° | 72° | 76° | 71° | 62° | 50° | 42° |
The curve peaks near 76°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Hillsboro's pool season and Portland's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Oregon season index.
Medford pool season FAQ
When should I open my pool in Medford, OR?
Target May 4. That date backs off two weeks from the day Medford's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Medford opening guide.
When should I close my pool in Medford?
The closing deadline is October 14 — late enough that the water has cooled out of the algae zone, early enough to beat Medford's first-freeze normal by about a week. See the Medford closing guide for the winterizing steps.
How long is the swim season in Medford?
Medford averages 109 days a year with normal highs of 80°F or better — about 20 days earlier than the Oregon median. The Oregon season index ranks all 8 covered cities by the same metric.
How warm does pool water get in Medford?
An unheated pool near Medford typically peaks around 76°F in high summer and bottoms out near 39°F in winter, never quite reaching the 78°F comfort line without a heater or solar cover. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Medford hits the closing window
Data: NOAA 1991–2020 climate normals via Medford Rogue Valley Airport (3.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.