Pool season · Texas
Sherman Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Sherman 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.
Sherman, TX — 140 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Sherman's swim season; the hollow teal run before it (March 18 to April 8) is when to open; the hollow amber run after is when to close, with November 5 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Sherman pool calendar
Opening — target March 25
Open by March 25 — a two-week head start on the April 8 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 5
The window opens October 26 once water leaves the algae zone; the model deadline is November 5, a week ahead of the November 19 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Sherman'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 43° | 45° | 51° | 60° | 67° | 76° | 81° | 84° | 80° | 71° | 59° | 49° |
Warmest water typically July–September (peaking near 84°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with San Marcos's pool season and Spring's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Sherman pool season FAQ
When should I open my pool in Sherman, TX?
Open by March 25 — the model places Sherman's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Sherman opening guide has the 12-step sequence.
When should I close my pool in Sherman?
Close by November 5: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Sherman closing guide sequences the work backward from that date.
How long is the swim season in Sherman?
Sherman averages 140 days a year with normal highs of 80°F or better — about 17 days later than the Texas median. The Texas season index ranks all 68 covered cities by the same metric.
How warm does pool water get in Sherman?
An unheated pool near Sherman typically peaks around 84°F in high summer and bottoms out near 43°F in winter, spending roughly 3 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 Sherman hits the closing window
Data: NOAA 1991–2020 climate normals via Sherman (5.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.