Port Louis
Mauritius
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Port Louis, Mauritius

The city of Port Louis in Mauritius, viewed from above, with a view of the sea and cloudy sky
The city of Port Louis in Mauritius, viewed from above, with a view of the sea and cloudy sky
The first month of the spring, September, is also a moderately hot month in Port Louis, Mauritius, with temperature in the range of an average high of 27.7°C (81.9°F) and an average low of 19.4°C (66.9°F).

Temperature

In September, the average high-temperature is relatively the same as in August - a still moderately hot 27.7°C (81.9°F). The average low-temperature, in Port Louis, is 19.4°C (66.9°F).

Rainfall

In Port Louis, during September, the rain falls for 3 days and regularly aggregates up to 17mm (0.7") of precipitation. Throughout the year, in Port Louis, there are 68 rainfall days, and 711mm (28") of precipitation is accumulated.

Sea temperature

Months with the coldest seawater are August and September, with an average sea temperature of 23.7°C (74.7°F).
Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 23.7°C (74.7°F).

Daylight

The average length of the day in September is 12h.

Sunshine

In September, the average sunshine is 8h.

UV index

The average daily maximum UV index in Port Louis is 10. A UV Index estimate of 8 to 10 represents a very high health risk from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 10 interpret into the following advice:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Prolonged stay under the direct sun should be avoided as much as possible, especially if a person burns easily. Sunscreen with a minimum 30 sun protection factor should always be used. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in September in Port Louis?

In Port Louis, in September, the average high-temperature is 27.7°C (81.9°F), and the average low-temperature is 19.4°C (66.9°F).

How many days does it rain in September in Port Louis?

In Port Louis, Mauritius, in September, during 3 rainfall days, 17mm (0.7") of precipitation is typically accumulated.

When is the sea coldest in Port Louis?

August and September, with an average sea temperature of 23.7°C (74.7°F), are months with the coldest seawater in Port Louis, Mauritius.

How warm is the water in September in Port Louis?

In September, the average sea temperature in Port Louis is 23.7°C (74.7°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 23.7°C (74.7°F).

What is the average length of the day in September in Port Louis?

In Port Louis, Mauritius, the average length of the day in September is 12h.

How long on average sun shines in September in Port Louis?

In September, the average sunshine in Port Louis, Mauritius, is 8h.

What is the UV index intensity in September in Port Louis?

The average daily maximum UV index in September in Port Louis is 10. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Port Louis, Mauritius
  • Average high temperature in September: 27.7°C

Warmest months (with the highest average high temperature) are January and March (31.5°C).
The month with the lowest average high temperature is July (26.7°C).

  • Average low temperature in September: 19.4°C

The month with the highest average low temperature is January (24.1°C).
The coldest month (with the lowest average low temperature) is August (19.1°C).

Average rainfall in September - Port Louis, Mauritius
  • Average rainfall in September: 17mm

The wettest month (with the highest rainfall) is February (160mm).
The driest month (with the lowest rainfall) is October (15mm).

Average rainfall days in September - Port Louis, Mauritius
  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is February (10 days).
Months with the lowest number of rainy days are September, October and November (3 days).

Average sea temperature in September - Port Louis, Mauritius
  • Average sea temperature in September: 23.7°C

The best month for swimming (with the highest average sea temperature) is March (28.5°C).
Coldest months (with the lowest average sea temperature) are August and September (23.7°C).

Average daylight in September / Average sunshine in September - Port Louis, Mauritius
  • Average daylight in September: 12h

The month with the longest days is December (Average daylight: 13.3h).
The month with shortest days is June (Average daylight: 10.9h).

  • Average sunshine in September: 8h

Months with most sunshine are October, November and December (Average sunshine: 9h).
Months with least sunshine are March, June, July and August (Average sunshine: 7).

Average UV index in September - Port Louis, Mauritius
  • Average UV index in September: 10

Months with the highest UV index are January, February, March, October, November and December (UV index 12).
Months with the lowest UV index are June and July (UV index 6).