Guantánamo Bay weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: November – July
What is the weather like in Guantánamo Bay in September?
In September, Guantánamo Bay is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. The sea averages 29.8 °C – almost as warm as a bath. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 15 days, totalling 87 mm. On about 26 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a good month for a holiday in Guantánamo Bay.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 79 | 75 | 76 |
| Day | 33° | 32° | 30° |
| Night | 26° | 25° | 24° |
| Sea | 30° | 30° | 30° |
| Sun | 8 h | 7 h | 7 h |
| Rain days | 11 | 15 | 15 |
More details for September
- Daylight
- 12 h 17 min06:48 – 19:04
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 26 days30 °C or moreAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %91 %
- Seaweight 25 %100 %
- Sunshineweight 20 %73 %
- Few rainy daysweight 20 %19 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Guantánamo Bay in September: quick answers
Is Guantánamo Bay hot in September?
Yes. In September, Guantánamo Bay is hot: daytime highs average 32 °C and nights stay around 25 °C. On about 26 days the thermometer climbs to 30 °C or more.
Can you swim in Guantánamo Bay in September?
Yes. In September the sea averages 29.8 °C – almost as warm as a bath.
Does it rain much in Guantánamo Bay in September?
It rains often – on about 15 days, adding up to 87 mm.
Guantánamo Bay month by month
The whole year in Guantánamo BayAll destinations: CubaCaribbean weather in SeptemberWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences