Pool season · Alabama
Mobile Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Mobile pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Mobile, AL — 178 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Mobile's swim season; the hollow teal run before it (February 20 to March 13) is when to open; the hollow amber run after is when to close, with November 23 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Mobile pool calendar
Opening — target February 27
Open by February 27 — a two-week head start on the March 13 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 23
Hold the cover until November 13, then winterize by November 23, a week ahead of the December 6 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Mobile'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 53° | 54° | 59° | 65° | 72° | 79° | 83° | 84° | 82° | 76° | 65° | 57° |
Warmest water typically June–September (peaking near 84°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Huntsville's pool season and Montgomery's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Alabama season index.
Mobile pool season FAQ
When should I open my pool in Mobile, AL?
The site model recommends opening by February 27 — about two weeks before Mobile'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 Mobile opening guide.
When should I close my pool in Mobile?
Winterize by November 23. The model holds the deadline a week ahead of Mobile's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Mobile closing guide.
How long is the swim season in Mobile?
Mobile averages 178 days a year with normal highs of 80°F or better — about 24 days earlier than the Alabama median. The Alabama season index ranks all 10 covered cities by the same metric.
How warm does pool water get in Mobile?
An unheated pool near Mobile typically peaks around 84°F in high summer and bottoms out near 52°F in winter, spending roughly 4 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 Mobile hits the closing window
Data: NOAA 1991–2020 climate normals via Mobile Dwtn Airport (4.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.