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Port-of-Spain Weather in September
Port-of-Spain in September averages 30°C (86°F) during the day and 26°C (79°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Port-of-Spain in September
Historically, the month has about 19 days of rain, averaging 119 mm (4.7 in) in total. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Port-of-Spain in September
Daytime highs in Port-of-Spain in September reach 30°C (86°F), with nights around 26°C (79°F). For most visitors, the main thing to prepare for is the heat during the day. With lows around 26°C (79°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Port-of-Spain in September
With approximately 197 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.
Average water temperature in September
With water at 28°C (82°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period, it feels comfortable straight away.September in Port-of-Spain has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Port-of-Spain Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Water Temperature
28°C (82°F) *
Chance of Rain
62%
Precipitation
119 mm (4.7 in)
Rainy days
19 days
Humidity
84% *
Sunshine
197 hours *
Percentage Sunshine
*
* Data from: Trinidad, Trinidad & Tobago (18 KM, 11 Miles).
Port-of-Spain Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Port-of-Spain - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Port-of-Spain typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Historical weather records for Port-of-Spain in September
Browse day-by-day weather records for Port-of-Spain spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Port-of-Spain historical weather extremes in September
The extremes listed below come from historical weather data collected in Port-of-Spain from 1990 through 2026.
- The hottest September day on record in Port-of-Spain reached 36°C (97°F) (September 16, 1999).
- On September 7, 1991, Port-of-Spain saw its coldest September day with temperatures maxing out at 25°C (77°F).
- Nighttime temperatures dropped to 21°C (70°F) on September 2, 2006, marking the coldest September night on record.
Best Places in Trinidad & Tobago in September
Find out more about the weather in Trinidad & Tobago and which places have the best travel conditions in this month. See all of Trinidad & Tobago in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Port-of-Spain in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. The water temperature sits at about 28°C (82°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Port-of-Spain in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Port-of-Spain 3-Day Forecast
More climate data for Port-of-Spain
Temperature Rainfall Sunshine Humidity Water Temp
See the full Port-of-Spain climate overview or explore weather in Trinidad & Tobago.
Popular in September
Where to go in September - average daytime high across popular destinations.
San Juan
30°C (86°F) Piarco31°C (88°F) Port-of-Spain
30°C (86°F) Crown Point
30°C (86°F) Castara30°C (86°F) Buccoo30°C (86°F) Scarborough30°C (86°F) Bon Accord Village30°C (86°F) Bucket list
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