George Town (Grand Cayman) weather in September
September in George Town: sweltering, rainy, with clean air — fine if you can take 39°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#9 of 12 months in George Town · #680 of 1413 destinations to visit in September · comfort 80/100 (tier A)
- Days
- 33°C
- Nights
- 26°C
- Wet days
- 16
- Sun
- 10.6 h
- Humidity
- 77%
- Daylight
- 12 h

Traveller notes on George Town in September
Other months in George Town
Forum posters note Grand Cayman gets around 50 inches of rain annually, much of it concentrated in the shoulder-season months of May and October. Posters describe October rain as typically intermittent - it comes down, then the sun returns - rather than an all-day washout, though experiences genuinely vary, with some travelers reporting glorious weather and others hitting rainier stretches. Posters are direct that October sits within prime Atlantic hurricane season, meaning real trip-disruption risk and travel insurance worth having in case a big storm requires canceling. On the upside, posters note October brings quieter crowds, easier restaurant bookings, lower condo prices, and local events like Restaurant Month and Cocktail Week. Posters generally rate October as a genuine trade-off for George Town - real rain and hurricane risk balanced against real value and lighter crowds.
Forum posters describe April as sitting near the end of the cooler, drier winter season (November-April) - typically mid-to-high 80sF by day, mid-to-high 70sF at night, with little to no rain and crystal-clear water. Posters call March through mid-May the best overall weather stretch, with no need to worry about tropical storms or hurricanes this time of year. The trade-off: April counts as high season, with room rates 40-100% above the off-season baseline, though posters note mid-April through mid-May (after Easter) brings meaningfully lower rates while the good weather largely holds - a sweet spot for value-conscious travelers willing to shift a couple of weeks later.
Add your own note from George Town's card on the map.
George Town climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in George Town 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.
Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for George Town'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 weatherGeorge Town's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in George Town in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Hurricane season
1 Jun – 30 NovIvan sat over Grand Cayman for the best part of a day in 2004 and flooded most of the island; everything built since is raised and shuttered for it. September and October carry the real risk. Source ↗
- Nature
Silversides in the swim-throughs
15 Jun – 15 Sep · usuallyDive seasonBaitballs of silversides pack the caverns at Devil's Grotto and Eden Rock, right off the George Town waterfront, with tarpon working through them. It is the rare world-class dive you can swim to from shore.
Where is George Town?
George Town in September — FAQ
- Is September a good time to visit George Town?
- September in George Town: sweltering, rainy, with clean air — fine if you can take 39°C afternoons. It ranks #9 of 12 months for George Town on SeasonMap's comfort score (80/100).
- What is the weather like in George Town in September?
- In September, George Town averages a daily high of 32.7°C and a low of 26.2°C, with about 114.1 mm of rain over roughly 16.4 rainy days.
- What is the air quality in George Town in September?
- George Town has a mean US Air Quality Index of about 34 in September.