Pool season · Hawaii
Kailua Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
No opening date, no closing deadline: Kailua's season bar below is one long swim window with a comfort gradient. The spring refresh and winter care pages hold the practical checklists for a pool that never sleeps; this page is the dashboard that says which of them applies today.
One color, 52 dots: Kailua's bar has no gray because the model never finds a week that forces a closing. Use the monthly water estimates below instead — the swing from 71°F to 80°F is what actually shapes swimming and maintenance here, from heater decisions at the cool end to sanitizer demand across the 231 days of genuine summer.
The Kailua pool calendar
Spring refresh
The model finds no closing week in Kailua — maintenance is continuous, with a 231-day prime stretch of 80°F+ afternoons.
Winter care
No forced dates: the 7-day mean never leaves the swim-viable range (floor 71.4°F). Spring refresh and winter care replace opening and closing.
Estimated water temperature by month
Monthly averages of the site's water model run on Kailua'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 72° | 72° | 72° | 74° | 75° | 77° | 79° | 79° | 80° | 79° | 77° | 75° |
Warmest water typically July–October (peaking near 80°F); heaters and covers shift any month up.
Email me when Kailua hits the closing window
Data: NOAA 1991–2020 climate normals via Waimanalo Experiment F 795.1 (4.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.