Pool season · South Carolina
North Charleston Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
North Charleston'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.
Each dot on the bar is one week of North Charleston's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (March 6–March 27), solid teal is swim season, and hollow amber is the closing window ending November 15. The black marker is today — its position against the colors is the entire executive summary.
The North Charleston pool calendar
Opening — target March 13
Open by March 13 — a two-week head start on the March 27 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 15
Hold the cover until November 5, then winterize by November 15, a week ahead of the November 27 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on North Charleston'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 50° | 51° | 56° | 63° | 70° | 77° | 82° | 82° | 79° | 73° | 62° | 55° |
Warmest water typically July–September (peaking near 83°F); heaters and covers shift any month up.
Email me when North Charleston hits the closing window
Data: NOAA 1991–2020 climate normals via Charleston International Airport (1.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.