Pool season · Georgia
Roswell Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Roswell'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 Roswell'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 26–April 16), solid teal is swim season, and hollow amber is the closing window ending October 27. The black marker is today — its position against the colors is the entire executive summary.
The Roswell 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 27
The window opens October 17 once water leaves the algae zone; the model deadline is October 27, a week ahead of the November 9 freeze normal.
Estimated water temperature by month
This is Roswell'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° | 58° | 66° | 74° | 78° | 80° | 76° | 68° | 56° | 48° |
Warmest water typically July–August (peaking near 80°F); heaters and covers shift any month up.
Email me when Roswell hits the closing window
Data: NOAA 1991–2020 climate normals via Atlanta Peachtree Airport (11.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.