Great Exuma (Exuma) weather in September

September in Great Exuma: sweltering, rainy, with clean air — fine if you can take sticky heat.

Updated September 2026 · climate normals from ERA5 reanalysis

Great Exuma🇧🇸 Bahamas · Bahamas & Bermuda · Island82
  1. 87Jan
  2. 90Feb
  3. 90Mar
  4. 90Apr
  5. 83May
  6. 85Jun
  7. 86Jul
  8. 85Aug
  9. 82Sep
  10. 78Oct
  11. 84Nov
  12. 86Dec

#11 of 12 months in Great Exuma · #607 of 1413 destinations to visit in September · comfort 82/100 (tier A)

Days
29°C
Nights
27°C
Wet days
16
Sun
10.8 h
Humidity
80%
Daylight
12 h
Great Exuma, Bahamas
Photo: Holiday4free.com (Manuel) · Pexels

Traveller notes on Great Exuma in September

Other months in Great Exuma

Forum posters describe early August in Great Exuma as offering good odds for ideal boating weather, though it will be genuinely hot and humid, with rain typically limited to isolated 30-60 minute downpours rather than washing out a full day. Posters specifically flag late July into early August as historically a strong window, while noting the back half of August moving into September brings a real uptick in tropical weather risk as the Atlantic hurricane season builds. Posters are consistent that the odds of a direct hurricane hit remain remote for any given visit - the worst storms historically cluster in September, October and November - but recommend checking cancellation and refund policies and considering travel insurance regardless. Posters generally rate August as hot, humid and mostly good boating weather for Great Exuma, with rising storm risk specifically toward the month's end.
Tripadvisor community · August · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe February daytime highs typically in the mid-70s to low-80sF, dropping to the high-60s to low-70sF at night - a light jacket or sweatshirt is standard evening advice. Posters note cold fronts move through the northern Bahamas roughly 2-3 times a week this time of year, each one bringing a couple of cloudier, breezier, cooler days before conditions swing back to sun. Water temperatures sit in the upper-70sF - warm by most standards, though posters call it a bit cool for fully comfortable swimming compared to summer. Overall, posters describe February as sunnier than rainy in the balance, with genuinely comfortable, low-humidity air outside of an actual cold-front passage.
Tripadvisor community · February · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Great Exuma's card on the map.

Great Exuma climate normals — September

Daytime high29°C / 84°F🔥 sweltering
Nighttime low27°C / 81°F
Feels like (high)34°C / 93°F
Sea temperature31°C / 87°F♨️ bath-warm
Rainfall119 mm / 4.7 in🌧 rainy
Rainy days16 days
Humidity80%💦 very humid
Dew point24°C / 76°F
Sunshine10.8 h/day
Daylight12.3 h
Wind24 km/h / 15 mph
Air quality (US AQI)28🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Great Exuma 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.

Quietschool holidays in 2 of the markets that fill it, one of its worst months for weather(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Great Exuma'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 weatherGreat Exuma's weather doesn't swing hard through the year — comfort stays fairly steady in every month.

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What's on in Great Exuma in September

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Hazard

    Hurricane season

    1 Jun – 30 Nov

    Exuma sits south of the track Dorian took into Abaco in 2019, but nothing in the Bahamas is out of range. Flights thin from late August and villa rates fall with the airlift. Source ↗

What's on around the world in September →

Where is Great Exuma?

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Great Exuma in September — FAQ

Is September a good time to visit Great Exuma?
September in Great Exuma: sweltering, rainy, with clean air — fine if you can take sticky heat. It ranks #11 of 12 months for Great Exuma on SeasonMap's comfort score (82/100).
What is the weather like in Great Exuma in September?
In September, Great Exuma averages a daily high of 28.8°C and a low of 27.2°C, with about 119.4 mm of rain over roughly 16.4 rainy days.
What is the air quality in Great Exuma in September?
Great Exuma has a mean US Air Quality Index of about 28 in September.