Pool season · Ohio
Mansfield Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Mansfield 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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Mansfield's swim season; the hollow teal run before it (April 27 to May 18) 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 Mansfield 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 5
Hold the cover until September 25, then winterize by October 5, a week ahead of the October 22 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Mansfield'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 28° | 27° | 34° | 44° | 56° | 65° | 72° | 72° | 68° | 59° | 47° | 36° |
The curve peaks near 72°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Mansfield hits the closing window
Data: NOAA 1991–2020 climate normals via Mansfield Lahm Municipal Airport (3.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.