SeasonMapClearwater weather in September
United States
September in Clearwater: sweltering, rainy, with clean air — fine if you can take 37°C afternoons.
#7 of 12 months in Clearwater · #663 of 1383 destinations to visit in September · comfort 80/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Clearwater in September
Other months in Clearwater
Clearwater's forum calls March usually lovely beach weather, though winter isn't fully done with the Gulf coast yet — a cold front can still blow through and cool things off for a day or two. Regulars flag March as one of the area's busiest months as snowbirds and spring-break families both converge, so book well ahead and pack a warmer layer just in case.
Add your own note from Clearwater's card on the map.
Clearwater climate normals — September
| Daytime high | 32°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 37°C / 99°F | |
| Sea temperature | 30°C / 86°F | ♨️ bath-warm |
| Rainfall | 149 mm / 5.9 in | 🌧 rainy |
| Rainy days | 10 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 10 h/day | |
| Daylight | 12.3 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Clearwater in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer break in United States(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Clearwater's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherClearwater's weather peaks March–May, best around April.
Best weatherFair weatherToughest weather
What's on in Clearwater in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Sea turtle nesting
1 May – 31 OctLoggerheads nest along the Pinellas beaches from May to the end of October, with hatchlings from midsummer. Beachfront lights are shaded or switched off at night for the duration, which is why the sea front goes dim after dark.
- Season
Gulf warm enough to swim
1 May – 15 NovSea warm enoughThe shallow Gulf shelf warms early and holds it late, so the water is comfortable from May into November and bathlike by August. January and February are the two months you would want a wetsuit.
- Hazard
Atlantic hurricane season
1 Jun – 30 NovOfficially June to November, with the dangerous weeks from mid-August to early October. Storm surge is the real risk on this low barrier coast, as Helene and Milton showed in 2024, and evacuation orders come by zone. Source ↗
- Hazard
Red tide
1 Aug – 28 Feb · usuallyBlooms drift in most often from late summer into winter, killing fish and putting an irritant in the air that makes the beach unpleasant within minutes. It is patchy and moves with the wind, so the county posts beach-by-beach status daily. Source ↗
Nearby, and something's on
Within 300 km of Clearwater — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Clearwater?
Clearwater in September — FAQ
- Is September a good time to visit Clearwater?
- September in Clearwater: sweltering, rainy, with clean air — fine if you can take 37°C afternoons. It ranks #7 of 12 months for Clearwater on SeasonMap's comfort score (80/100).
- What is the weather like in Clearwater in September?
- In September, Clearwater averages a daily high of 31.8°C and a low of 24.8°C, with about 148.6 mm of rain over roughly 10 rainy days.
- What is the air quality in Clearwater in September?
- Clearwater has a mean US Air Quality Index of about 40 in September.
Other months in Clearwater
Compare Clearwater in September
Warmer or cooler than Clearwater in September
Similar destinations in North America — September
Within 300 km: Sarasota's Sea turtle nesting on 1 May – 31 Oct, and Naples, Florida's Sea turtle nesting on 1 May – 31 Oct.