Port of Spain weather in September
September in Port of Spain: sweltering, rainy, with clean air — fine if you can take 19 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#7 of 12 months in Port of Spain · #1031 of 1413 destinations to visit in September · comfort 66/100 (tier C)
- Days
- 32°C
- Nights
- 26°C
- Wet days
- 19
- Sun
- 10.8 h
- Humidity
- 81%
- Daylight
- 12 h

Traveller notes on Port of Spain in September
Notes from nearby Tobago (102 km away)
Port of Spain doesn't have its own notes for September yet — these are about Tobago, close enough to share the season.
Caribbean forum threads about dodging hurricane season keep circling back to Tobago's map position: the island sits at the southern edge of the hurricane belt, and posters rank Trinidad and Tobago with the ABC islands among the lower-risk southern options, noting these islands 'do occasionally get brushed by or hit by tropical storms and hurricanes... just not as often as up north' while the Grenadines sit a little more exposed. The other half of the September picture is the green season itself: our record shows about 20 rainy days and 140mm this month, sitting inside the island's long wet stretch - June through August and October through November actually run wetter - so a September visit is about accepting green-season rain as normal rather than timing around a single stormy peak. The consolation is real: a sea near 30C, bath-warm, plus the quiet, beach-oriented character posters consistently describe as Tobago's appeal over its busier sister island.
Other months in Port of Spain
Detailed July-specific trip reports for Port of Spain are relatively thin on the forum, with more discussion focused on rainy-season logistics generally than granular July detail. Posters discussing the broader Trinidad and Tobago rainy season, which runs roughly June through December, describe frequent, often heavy but typically short-lived downpours rather than sustained all-day rain, consistent with the wet-season pattern across this part of the southern Caribbean. Given the limited destination-specific detail for this exact month, this note leans on that broader seasonal cue: July sits within the wetter half of the year for Port of Spain, with hot, humid conditions and a real, near-daily chance of rain that visitors should plan flexible outdoor time around.
Forum coverage of Port of Spain's January weather specifically is thin, with one poster's thread title itself suggesting rain is a real enough possibility to plan a visit around potentially rainy days. Given the limited detailed trip reports available, the broader Caribbean January pattern - the drier, cooler half of the year across most of the region - is the most useful general guide, though Trinidad's position further south and closer to the South American coast means its climate runs a bit more humid and rain-prone year-round than islands further north in the Caribbean chain. Posters generally recommend having backup indoor plans in case a January day in Port of Spain does turn rainy.
Add your own note from Port of Spain's card on the map.
Port of Spain climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Port of Spain 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 Port of Spain'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 weatherPort of Spain's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
Nearby, and something's on
Within 300 km of Port of Spain — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Port of Spain?
Port of Spain in September — FAQ
- Is September a good time to visit Port of Spain?
- September in Port of Spain: sweltering, rainy, with clean air — fine if you can take 19 rainy days. It ranks #7 of 12 months for Port of Spain on SeasonMap's comfort score (66/100).
- What is the weather like in Port of Spain in September?
- In September, Port of Spain averages a daily high of 31.5°C and a low of 25.6°C, with about 97.1 mm of rain over roughly 19.1 rainy days.
- What is the air quality in Port of Spain in September?
- Port of Spain has a mean US Air Quality Index of about 37 in September.
Within 300 km: Tobago's Emancipation and Independence on 31 Jul – 1 Sep.