Port of Spain 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
Fair
Best time to visit: January – April
What is the weather like in Port of Spain in September?
In September, Port of Spain is hot: daytime highs average 29 °C, and even at night it stays warm at around 26 °C. The sea averages 29.3 °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 23 days, totalling 139 mm. The air is often humid and muggy. All in all, September is a so-so month for a holiday in Port of Spain.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 56 | 52 | 52 |
| Day | 28° | 29° | 29° |
| Night | 26° | 26° | 26° |
| Sea | 29° | 29° | 29° |
| Sun | 7 h | 7 h | 7 h |
| Rain days | 27 | 23 | 25 |
More details for September
- Daylight
- 12 h 12 min05:56 – 18:07
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 65 %on averageAll months
- Hot days
- 4 days30 °C or moreAll months
- Time zone
- UTC−4America/Port_of_Spain
How the score comes together
- Temperatureweight 50 %76 %
- Sunshineweight 20 %68 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Port of Spain in September: quick answers
Is Port of Spain hot in September?
Yes. In September, Port of Spain is hot: daytime highs average 29 °C and nights stay around 26 °C. On about 4 days the thermometer climbs to 30 °C or more.
Can you swim in Port of Spain in September?
Yes. In September the sea averages 29.3 °C – almost as warm as a bath.
Does it rain much in Port of Spain in September?
It rains often – on about 23 days, adding up to 139 mm.
Port of Spain month by month
The whole year in Port of SpainAll destinations: Trinidad and TobagoCaribbean 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