Pool season · South Carolina
Spartanburg Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Spartanburg'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 Spartanburg's swim season; the hollow teal run before it (March 26 to April 16) is when to open; the hollow amber run after is when to close, with October 25 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Spartanburg pool calendar
Opening — target April 2
Open by April 2 — a two-week head start on the April 16 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 25
Hold the cover until October 17, then winterize by October 25, a week ahead of the November 1 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Spartanburg'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 43° | 44° | 50° | 57° | 65° | 73° | 78° | 79° | 76° | 67° | 56° | 47° |
Warmest water typically July–August (peaking near 79°F); heaters and covers shift any month up.
Email me when Spartanburg hits the closing window
Data: NOAA 1991–2020 climate normals via Spartanburg 3 SSE (2.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.