Pool season · Washington
Federal Way Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Federal Way'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.
The bar compresses Federal Way's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the May 17–June 7 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends September 29. Wherever the today marker sits, the nearest color change is your next appointment.
The Federal Way pool calendar
Opening — target May 24
Open by May 24 — a two-week head start on the June 7 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline September 29
The window opens September 19 once water leaves the algae zone; the model deadline is September 29, a week ahead of the November 14 freeze normal.
Estimated water temperature by month
This is Federal Way'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 42° | 43° | 46° | 50° | 55° | 60° | 65° | 68° | 65° | 58° | 50° | 44° |
The curve peaks near 68°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Federal Way hits the closing window
Data: NOAA 1991–2020 climate normals via Tacoma #1 (5.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.