Pool season · Washington
Bremerton Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Bremerton's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Bremerton, WA — 0 swim days a yearEach dot on the bar is one week of Bremerton'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 29–June 19), solid teal is swim season, and hollow amber is the closing window ending September 28. The black marker is today — its position against the colors is the entire executive summary.
The Bremerton pool calendar
Opening — target June 5
Target June 5; the practical window runs May 29–June 19, and the 7-day mean crosses the 61°F threshold around June 19. Cold-water starts are the cheap ones.
Closing — deadline September 28
Hold the cover until September 18, then winterize by September 28, a week ahead of the November 14 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Bremerton'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 40° | 42° | 44° | 48° | 53° | 59° | 63° | 67° | 64° | 57° | 48° | 42° |
The curve peaks near 67°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Bellingham's pool season and Everett's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Washington season index.
Bremerton pool season FAQ
When should I open my pool in Bremerton, WA?
Open by June 5 — the model places Bremerton's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Bremerton opening guide has the 12-step sequence.
When should I close my pool in Bremerton?
Close by September 28: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Bremerton closing guide sequences the work backward from that date.
How long is the swim season in Bremerton?
Bremerton averages 0 days a year with normal highs of 80°F or better — about 12 days later than the Washington median. The Washington season index ranks all 21 covered cities by the same metric.
How warm does pool water get in Bremerton?
An unheated pool near Bremerton typically peaks around 67°F in high summer and bottoms out near 40°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 Bremerton hits the closing window
Data: NOAA 1991–2020 climate normals via Bremerton (2.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.