Port-Louis Weather in September
September in Port-Louis brings high temperatures, with highs of 30°C (86°F) and nights dropping to 26°C (79°F). Rainfall is on the higher side this month, averaging around 143 mm (5.6 in), so keep a rain jacket handy.
Rainfall in Port-Louis in September
Looking at the last 30 years, the data shows about 17 days with rain, averaging 143 mm (5.6 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Port-Louis in September
September in Port-Louis brings high temperatures, with highs of 30°C (86°F) and nights around 26°C (79°F). This kind of day-to-night contrast is typical for this time of year. Nights remain warm at around 26°C (79°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.
Sunshine in Port-Louis in September
Expect sunny days throughout the month, with an estimated 218 hours of sunshine. This makes it a pleasant time to visit Port-Louis.
Wind Speed in Port-Louis in September
September has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.
Average water temperature in September
At 29°C (84°F), the water is very warm — more like a heated pool than the sea. Great for those who like warm water, though some may find it less refreshing on a hot day.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Port-Louis. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Guadeloupe, check out our Port-Louis's climate page.
Port-Louis Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Water Temperature
29°C (84°F) *
Chance of Rain
58%
Precipitation
143 mm (5.6 in)
Rainy days
17 days
Humidity
82% *
Windspeed
3 m/s (6 knots) *
Sunshine
218 hours *
Percentage Sunshine
*
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Port-Louis 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 for Port-Louis in September
Browse day-by-day weather records for Port-Louis spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Port-Louis historical weather extremes in September
Based on 24 years of weather observations (2001-2025), these are the most extreme conditions recorded in Port-Louis.
- Port-Louis recorded its highest September temperature of 34°C (93°F) on September 8, 2001.
- On September 26, 2024, Port-Louis saw its coldest September day with temperatures maxing out at 26°C (79°F).
- The coldest night in September in Port-Louis was on September 6, 2013, with a minimum of 20°C (68°F).
Best Places in Guadeloupe in September
Find out more about the weather in Guadeloupe and which places have the best travel conditions in this month. See all of Guadeloupe in September →
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What to Wear in Port-Louis in September
Warm but pleasant conditions in Port-Louis in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. The water temperature sits at about 29°C (84°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-Louis in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Guadeloupe, check out our Port-Louis's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Port-Louis climate overview or explore weather in Guadeloupe.
