Pool season · California
Anaheim Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Anaheim'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.
Anaheim, CA — 151 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Anaheim's swim season; the hollow teal run before it (February 8 to March 1) is when to open; the hollow amber run after is when to close, with December 10 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Anaheim pool calendar
Opening — target February 15
Open by February 15 — a two-week head start on the March 1 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline December 10
Hold the cover until November 30, then winterize by December 10, a week ahead of the December 25 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Anaheim'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 60° | 60° | 61° | 64° | 67° | 70° | 74° | 77° | 77° | 74° | 68° | 61° |
The curve peaks near 78°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Alhambra's pool season and Antioch's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Anaheim pool season FAQ
When should I open my pool in Anaheim, CA?
Open by February 15 — the model places Anaheim's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Anaheim opening guide has the 12-step sequence.
When should I close my pool in Anaheim?
Close by December 10: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Anaheim closing guide sequences the work backward from that date.
How long is the swim season in Anaheim?
Anaheim averages 151 days a year with normal highs of 80°F or better — about 45 days earlier than the California median. The California season index ranks all 147 covered cities by the same metric.
How warm does pool water get in Anaheim?
An unheated pool near Anaheim typically peaks around 78°F in high summer and bottoms out near 59°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 Anaheim hits the closing window
Data: NOAA 1991–2020 climate normals via Anaheim (2.0 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.