Pool season · South Carolina
Florence Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Florence'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.
Florence, SC — 160 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Florence's swim season; the hollow teal run before it (March 14 to April 4) is when to open; the hollow amber run after is when to close, with November 6 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Florence pool calendar
Opening — target March 21
Target March 21; the practical window runs March 14–April 4, and the 7-day mean crosses the 61°F threshold around April 4. Cold-water starts are the cheap ones.
Closing — deadline November 6
The window opens October 28 once water leaves the algae zone; the model deadline is November 6, a week ahead of the November 13 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Florence'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 47° | 48° | 53° | 61° | 69° | 76° | 81° | 82° | 79° | 71° | 60° | 52° |
Warmest water typically July–September (peaking near 82°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Columbia's pool season and Greenville's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the South Carolina season index.
Florence pool season FAQ
When should I open my pool in Florence, SC?
Target March 21. That date backs off two weeks from the day Florence's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Florence opening guide.
When should I close my pool in Florence?
The closing deadline is November 6 — late enough that the water has cooled out of the algae zone, early enough to beat Florence's first-freeze normal by about a week. See the Florence closing guide for the winterizing steps.
How long is the swim season in Florence?
Florence averages 160 days a year with normal highs of 80°F or better — about 7 days earlier than the South Carolina median. The South Carolina season index ranks all 12 covered cities by the same metric.
How warm does pool water get in Florence?
An unheated pool near Florence typically peaks around 82°F in high summer and bottoms out near 46°F in winter, spending roughly 3 months at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Florence hits the closing window
Data: NOAA 1991–2020 climate normals via Florence Regional Airport (3.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.