Pool season · Virginia
Winchester Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Winchester 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.
Winchester, VA — 92 swim days a yearEach dot on the bar is one week of Winchester's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (April 19–May 10), solid teal is swim season, and hollow amber is the closing window ending October 10. The black marker is today — its position against the colors is the entire executive summary.
The Winchester pool calendar
Opening — target April 26
Open by April 26 — a two-week head start on the May 10 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 10
Hold the cover until September 30, then winterize by October 10, a week ahead of the October 29 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Winchester'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 34° | 33° | 39° | 49° | 59° | 68° | 75° | 75° | 71° | 61° | 50° | 40° |
The curve peaks near 76°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Williamsburg's pool season and Alexandria's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Virginia season index.
Winchester pool season FAQ
When should I open my pool in Winchester, VA?
Open by April 26 — the model places Winchester's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Winchester opening guide has the 12-step sequence.
When should I close my pool in Winchester?
Close by October 10: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Winchester closing guide sequences the work backward from that date.
How long is the swim season in Winchester?
Winchester averages 92 days a year with normal highs of 80°F or better — about 16 days later than the Virginia median. The Virginia season index ranks all 16 covered cities by the same metric.
How warm does pool water get in Winchester?
An unheated pool near Winchester typically peaks around 76°F in high summer and bottoms out near 33°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 Winchester hits the closing window
Data: NOAA 1991–2020 climate normals via Winchester (1.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.