Pool season · Arkansas
Fort Smith Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Fort Smith'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 Fort Smith'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 21–April 11), solid teal is swim season, and hollow amber is the closing window ending October 30. The black marker is today — its position against the colors is the entire executive summary.
The Fort Smith pool calendar
Opening — target March 28
Open by March 28 — a two-week head start on the April 11 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 30
Hold the cover until October 22, then winterize by October 30, a week ahead of the November 6 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Fort Smith'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 41° | 42° | 50° | 59° | 67° | 75° | 82° | 83° | 79° | 69° | 57° | 47° |
Warmest water typically July–September (peaking near 84°F); heaters and covers shift any month up.
Email me when Fort Smith hits the closing window
Data: NOAA 1991–2020 climate normals via Ft Smith Regional Airport (1.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.