Pool season · Vermont
Burlington Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Burlington 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.
Burlington, VT — 60 swim days a yearEach dot on the bar is one week of Burlington's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (May 3–May 24), solid teal is swim season, and hollow amber is the closing window ending September 30. The black marker is today — its position against the colors is the entire executive summary.
The Burlington pool calendar
Opening — target May 10
Open by May 10 — a two-week head start on the May 24 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline September 30
The window opens September 20 once water leaves the algae zone; the model deadline is September 30, a week ahead of the October 15 freeze normal.
Estimated water temperature by month
This is Burlington'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 24° | 21° | 28° | 39° | 53° | 64° | 71° | 72° | 67° | 56° | 44° | 33° |
The curve peaks near 72°F — comfortable-water months here usually involve a heater or a solar cover.
Burlington pool season FAQ
When should I open my pool in Burlington, VT?
Target May 10. That date backs off two weeks from the day Burlington's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Burlington opening guide.
When should I close my pool in Burlington?
The closing deadline is September 30 — late enough that the water has cooled out of the algae zone, early enough to beat Burlington's first-freeze normal by about a week. See the Burlington closing guide for the winterizing steps.
How long is the swim season in Burlington?
Burlington averages 60 days a year with normal highs of 80°F or better — right on the statewide median. The Vermont season index ranks all 1 covered cities by the same metric.
How warm does pool water get in Burlington?
An unheated pool near Burlington typically peaks around 72°F in high summer and bottoms out near 20°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 Burlington hits the closing window
Data: NOAA 1991–2020 climate normals via Burlington International Airport (4.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.