Pool season · Mississippi
Gulfport Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Gulfport 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.
Gulfport, MS — 169 swim days a yearEach dot on the bar is one week of Gulfport's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (February 23–March 16), solid teal is swim season, and hollow amber is the closing window ending November 19. The black marker is today — its position against the colors is the entire executive summary.
The Gulfport pool calendar
Opening — target March 2
Open by March 2 — a two-week head start on the March 16 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 19
The window opens November 9 once water leaves the algae zone; the model deadline is November 19, a week ahead of the December 3 freeze normal.
Estimated water temperature by month
This is Gulfport'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52° | 53° | 59° | 65° | 72° | 79° | 82° | 83° | 81° | 75° | 64° | 56° |
Warmest water typically June–September (peaking near 83°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Jackson's pool season and Hattiesburg's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Mississippi season index.
Gulfport pool season FAQ
When should I open my pool in Gulfport, MS?
The site model recommends opening by March 2 — about two weeks before Gulfport'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 Gulfport opening guide.
When should I close my pool in Gulfport?
Winterize by November 19. The model holds the deadline a week ahead of Gulfport's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Gulfport closing guide.
How long is the swim season in Gulfport?
Gulfport averages 169 days a year with normal highs of 80°F or better — about 7 days earlier than the Mississippi median. The Mississippi season index ranks all 3 covered cities by the same metric.
How warm does pool water get in Gulfport?
An unheated pool near Gulfport typically peaks around 83°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 Gulfport hits the closing window
Data: NOAA 1991–2020 climate normals via Gulfport - Biloxi Airport (1.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.