Pool season · California
Seaside Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Seaside'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.
The bar compresses Seaside's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the June 10–July 1 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 20. Wherever the today marker sits, the nearest color change is your next appointment.
The Seaside pool calendar
Opening — target June 17
Target June 17; the practical window runs June 10–July 1, and the 7-day mean crosses the 61°F threshold around July 1. Cold-water starts are the cheap ones.
Closing — deadline October 20
The window opens October 10 once water leaves the algae zone; the model deadline is October 20, a week ahead of the December 23 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Seaside'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52° | 53° | 54° | 55° | 57° | 59° | 61° | 62° | 63° | 62° | 58° | 53° |
The curve peaks near 63°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Seaside hits the closing window
Data: NOAA 1991–2020 climate normals via Monterey Peninsul Airport (2.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.