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Mahe Island in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Mahe Island in September will be like? Take a look at our weather guide for Mahe Island, based on historical data.
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September

Weather in Mahe Island in September 2025

OK Weather
Warm
🌧️
Rainy
🌊
Warm water
If you plan to visit Mahe Island in September, the weather is typically alright, with an average high temperature of +73°F during the day and approximately 1 sunny days. Expect some rainy, though, as there are typically 23 rainy days in the month and around 110 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flights in one click on Avionero.

Average weather

☀️
+73°F
Avg. max. temperature
+66°F
Min.
+81°F
Max.
110 mm
Total precipitation
79%
Avg. humidity
5 m/s
Avg. wind
1 ☀️
Sunny Days
5 ⛅️
Cloudy
23 🌦
Rainy
Our opinion: Mahe Island has OK weather in September.
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Average temperature in Mahe Island in September

Here are the expected maximum, average and minimum temperatures in Mahe Island for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +75°F during the day to a minimum of +70°F during the night, the temperature in September averages around +75°F.

The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +75°F to +75°F.

Is Mahe Island warm or cold in September?

Mahe Island is typically warm in September.

Maximum temperatures go up compared to the previous month from +73°F to +73°F. The minimum temperature also goes up from +70°F to +72°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

Take a look at how September is compared to other months in Mahe Island:

Water temperature in Mahe Island in September

Water in Mahe Island in September is Warm. It varies from +80°F to +84°F, with an average of +82°F. Note that the air temperature is lower than the water temperature, averaging around +73°F.

In September, water temperatures are average relative to the rest of the year:

The warmest water temperatures in Mahe Island are reached in April, when the average sea temperature rises to +86°F. The coldest water temperatures are in August, with an average of +79°F.

Can you swim in Mahe Island in September?

You can absolutely swim in Mahe Island in September, the water is warm (+82°F in average), similar to heated pools. Suitable for most people, including children and the elderly.
🦭
Cold
Below +61°F
🏄‍♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
Bring your swimming suit, sunscreen and your favorite inflatable pink flamingo.

Climate in Mahe Island in September

Mahe Island weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+73°F+73°F+75°F
Min. temperature
+64°F+66°F+66°F
Max. temperature
+81°F+81°F+82°F
Rainfall
57 mm110 mm113 mm
Wind
6 m/s5 m/s3 m/s
Avg. water temperature
+79°F+82°F+83°F
Humidity
80%79%79%
Air pressure
1011 HPa1011 HPa1011 HPa
Sunny days
012
Cloudy days
755
Rainy days
232323
Snowy days
000

September weather is still as ok as in August. The temperature levels stay the same in the area of +73°F for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 57 mm to 110 mm. It feels drier, as humidity decreases from 80% to 79%. Winds are calmer in comparison to August, going down from 6 m/s to 5 m/s on average. The good news is there are likely to be more sunny days in September, from 0 to 1.

October brings much the same weather, it remains ok.

Wind

Wind speed in Mahe Island in September based on historical data.
Last Year
Historical Data

The average wind speed is 6 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.

The average wind speed in Mahe Island is gradually increasing during September, going from 5 m/s to 5 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Mahe Island based on historical data.
Last Year
Historical Data
Typically, there is a 97% chance of rain on an average day in September, with total rainfall of approximately 539 mm. The maximum amount of rainfall per day is around 93 mm, which is considered heavy rain. September is a pretty wet month with over 29 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Mahe Island wettest month is January, where a typical day has a 74% chance of precipitation and 223 mm of rainfall per day. July, on the other hand, is the driest month with a mere 77% chance of precipitation and 50 mm of rainfall per day.

How was the weather last September in Mahe Island?

This is the weather in Mahe Island in September 2024:
1 September
🌧️
+74°F
2 September
🌧️
+74°F
3 September
🌧️
+74°F
4 September
🌧️
+75°F
5 September
🌧️
+74°F
6 September
🌧️
+74°F
7 September
☁️
+75°F
8 September
🌧️
+74°F
9 September
🌧️
+74°F
10 September
🌧️
+75°F
11 September
🌧️
+74°F
12 September
🌧️
+75°F
13 September
☁️
+75°F
14 September
🌧️
+75°F
15 September
🌧️
+74°F
16 September
🌧️
+74°F
17 September
🌧️
+74°F
18 September
☁️
+75°F
19 September
☁️
+76°F
20 September
🌧️
+75°F
21 September
🌧️
+76°F
22 September
🌧️
+74°F
23 September
🌧️
+75°F
24 September
🌧️
+73°F
25 September
🌧️
+73°F
26 September
🌧️
+74°F
27 September
🌧️
+75°F
28 September
🌧️
+75°F
29 September
🌧️
+74°F
30 September
🌧️
+75°F
In September 2024 Mahe Island had 0 sunny days, 4 cloudy days, and 26 rainy days. The average maximum temperature was +75°F, with an absolute maximum of +75°F and a minimum of +73°F. The average humidity was 85%, with a maximum of 100% and a minimum of 77%. The average wind speed was 6 m/s, with a maximum of 11 m/s and a minimum of 1 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Mahe Island climate has changed over the last 43 years.

The climate in Mahe Island in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1984 (+73°F) and the highest in 2017 (+79°F). The driest year was 1996 with only 883 mm of rainfall, and the wettest year was 2019 with 2528 mm.

FAQ

Frequently asked questions about the weather in Mahe Island in September:

Is September a good time to visit Mahe Island?

It’s always a good time to visit Mahe Island, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Mahe Island in September?

September is warm in Mahe Island. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Can you swim in Mahe Island in September?

Yes, you can swim in Mahe Island in September, the water temperature averaging at +82°F. This temperature is considered warm and comfortable for most swimmers.

Is Mahe Island rainy in September?

Mahe Island is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Mahe Island in September?

Usually, it’s not very sunny in Mahe Island in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Monthly weather in Mahe Island

Source of the data

For this page, we’ve looked at the typical weather in Mahe Island, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.