Pool season · Michigan
Westland Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Westland's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Westland, MI — 72 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Westland's swim season; the hollow teal run before it (April 28 to May 19) is when to open; the hollow amber run after is when to close, with October 5 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Westland pool calendar
Opening — target May 5
Target May 5; the practical window runs April 28–May 19, and the 7-day mean crosses the 61°F threshold around May 19. Cold-water starts are the cheap ones.
Closing — deadline October 5
The window opens September 25 once water leaves the algae zone; the model deadline is October 5, a week ahead of the October 27 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Westland'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 28° | 26° | 33° | 44° | 55° | 66° | 73° | 74° | 69° | 59° | 47° | 36° |
The curve peaks near 74°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Warren's pool season and Wyoming's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Michigan season index.
Westland pool season FAQ
When should I open my pool in Westland, MI?
Target May 5. That date backs off two weeks from the day Westland's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Westland opening guide.
When should I close my pool in Westland?
The closing deadline is October 5 — late enough that the water has cooled out of the algae zone, early enough to beat Westland's first-freeze normal by about a week. See the Westland closing guide for the winterizing steps.
How long is the swim season in Westland?
Westland averages 72 days a year with normal highs of 80°F or better — about 5 days earlier than the Michigan median. The Michigan season index ranks all 23 covered cities by the same metric.
How warm does pool water get in Westland?
An unheated pool near Westland typically peaks around 74°F in high summer and bottoms out near 25°F in winter, never quite reaching the 78°F comfort line without a heater or solar cover. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Westland hits the closing window
Data: NOAA 1991–2020 climate normals via Detroit Metro Airport (6.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.