Pool season · Georgia
Roswell Pool Season: the Year on One Bar
Last updated: July 25, 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.
Roswell, GA — 135 swim days a yearEach 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.
Every station tells its own story: compare this curve with Macon's pool season and Sandy Springs's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Georgia season index.
Roswell pool season FAQ
When should I open my pool in Roswell, GA?
The site model recommends opening by April 2 — about two weeks before Roswell's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Roswell opening guide.
When should I close my pool in Roswell?
Winterize by October 27. The model holds the deadline a week ahead of Roswell's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Roswell closing guide.
How long is the swim season in Roswell?
Roswell averages 135 days a year with normal highs of 80°F or better — about 5 days later than the Georgia median. The Georgia season index ranks all 18 covered cities by the same metric.
How warm does pool water get in Roswell?
An unheated pool near Roswell typically peaks around 80°F in high summer and bottoms out near 42°F in winter, spending roughly 2 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 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.