Warm enough to swim? Orlando month by month
| Month | Daily high | Daily average | Verdict |
|---|---|---|---|
| January | 71°F | 62°F | Heater territory |
| February | 74°F | 64°F | Brisk — fine in a warm spell |
| March | 78°F | 68°F | Comfortable |
| April | 83°F | 73°F | Comfortable |
| May | 88°F | 78°F | Prime swimming |
| June | 91°F | 82°F | Prime swimming |
| July | 92°F | 84°F | Prime swimming |
| August | 92°F | 84°F | Prime swimming |
| September | 90°F | 82°F | Prime swimming |
| October | 84°F | 76°F | Prime swimming |
| November | 78°F | 69°F | Comfortable |
| December | 73°F | 64°F | Brisk — fine in a warm spell |
Verdicts follow the daily average: 68°F+ is comfortable for most people, 75°F+ is prime, and below 62°F you're in heater territory. An unheated pool's water tends to sit near the recent daily average, a touch above it in spring and below in fall.
Reading the Orlando pool year
With roughly 292 swimmable days, Orlando owners get a season most of the country would call summer-and-a-half. The short cool stretch is the one trap: it's tempting to walk away from the pool in Dec without a proper close, and a warm, neglected pool grows algae fast. Either keep it circulating and lightly chlorinated all winter, or do a true close — half-measures cost the most.
Frequently asked questions
When should I open my pool in Orlando?
Most Orlando owners are happy opening in the Jan 21 – Mar 13 stretch — that's when daily average air temperature climbs through the low-to-mid 60s°F, which puts the water near 70°F within a couple of weeks. Opening earlier is fine (algae actually prefers a late opening: a warm, covered pool with no chlorine is a petri dish); swimming just starts brisk.
When should I close my pool in Orlando?
Around Nov 21 – Jan 9, as daily averages fall back through the low 60s°F. Waiting until water holds below ~60°F is smart — algae is nearly dormant there, so the pool goes into winter clean. Closing too early in warm weather is the classic recipe for a swampy spring opening.
How long is the swim season in Orlando?
About 292 days without a heater — from roughly Feb 19 to Dec 8. A heat pump or gas heater typically adds 3–6 weeks on each end; a solar cover alone adds a week or two by holding overnight gains.
Where do these Orlando dates come from?
From 1991–2020 NOAA temperature records at the Orlando Executive Airport station, 5 km from central Orlando. The working assumption: pools become pleasant as daily average air temperature passes 62–68°F, since water lags air by a week or two. A heater, cover, screened enclosure, or an unusually sunny yard all shift the real dates.