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Climate in Nosy Be (Madagascar)


Average weather, temperature, rainfall, sunshine hours

Flag - Madagascar

Nosy Be, where it is located


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Climate chart - Nosy Be
In Nosy Be (or Nossi-bé), the climate is tropical, hot all year round, with a rainy, hotter season from November to April and a dry season from May to October.
The island is located in the northwest of Madagascar, in the Diana region, at 13 degrees south latitude. The main city is Andoany (or Hell-Ville).

In the austral summer, this area is affected by the hot and humid monsoon coming from the north-west, while in the austral winter, the cooler and drier south-east trade winds prevail. The climate of the neighbouring islands, such as Nosy Komba, Nosy Mitsio, Nosy Tanikely and Nosy Sakatia, is similar.

In the period that could be called winter, from June to September, the night temperature drops quite often below 20 °C (68 °F), and sometimes, it can even drop to around 15/16 °C (59/61 °F), but during the day, it's almost always warm, thanks to the winds that blow from the interior of Madagascar.

In an average year, about 1,750 millimeters (68 inches) of rain fall. In the rainiest months (December, January and February), the rains are definitely frequent, in fact, they occur almost daily, and they can sometimes be torrential. In the dry season, from May to October, showers are rare.

The amount of sunshine in Nosy Be is good from May to October, while it is acceptable in the rainiest months, from December to February, when, apart from showers and thunderstorms, the sun shines for a few hours a day.

From November to mid-May, Nosy Be may be affected by the tropical cyclones of the South-West Indian Ocean, which, in any case, are more common from January to March.

Image of Nosy Be

The sea in Nosy Be is warm enough to swim in all year round, since the water temperature ranges from 26 °C (79 °F) between July and October to 29 °C (84 °F) between January and April.

Best Time


The best time to go to Nosy Be goes from mid-May to October. In the first half of May, usually, the weather is already good, but there is still some risk, though low, of tropical cyclones, as happened with cyclone Kesiny, which affected this area around May 10, 2002.

Nosy Be - Climate data


In Nosy Be, the average temperature of the coldest month (July) is of 24.6 °C, that of the warmest month (March) is of 28 °C. Here are the average temperatures.
Nosy Be - Average temperatures (1991-2020)
Temperatures (°C)
MonthMinMaxMean
January23.931.527.7
February2431.527.8
March24.131.928
April23.732.228
May22.331.426.8
June20.630.225.4
July19.529.724.6
August19.53024.8
September20.530.625.6
October22.331.827
November23.431.927.6
December23.931.627.8
Year22.331.226.7

Precipitation amounts to 1730 millimeters per year: it is therefore abundant. It ranges from 21.2 millimeters in the driest month (July) to 392.9 millimeters in the wettest one (January). Here is the average precipitation.
Nosy Be - Average precipitation
MonthRain (mm)Days
January39320
February33417
March28116
April1069
May355
June294
July213
August274
September354
October304
November13510
December30216
Year1730113

The sea temperature ranges from 25.5 °C in August to 29 °C in January, February, March, April. Here are the average sea temperatures.
Nosy Be - Sea temperature
MonthTemperatures (°C)
January29
February29
March29
April29
May28.5
June27
July26
August25.5
September26
October26.5
November27.5">
December28.5
Year27.7

There are on average around 2925 sunshine hours per year. Here are the average hours of sunshine per day.
Nosy Be - Sunshine hours
MonthAverageTotal
January6185
February6170
March7225
April8245
May9270
June8.5250
July8.5265
August9285
September9.5280
October9280
November8.5250
December7220
Year82925

Nosy Be - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)


January is generally a very hot, muggy month. The average temperature is of 27.7 °C, with a minimum of 23.9 °C and a maximum of 31.5 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 22.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 34 °C.
Rain iconPrecipitation amounts to 392.9 mm, distributed over 20 days.
The day lasts on average 12 hours and 50 minutes.
Sun iconThere are on average 6 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of 7.4 kph.
Sea iconThe average sea temperature is of 28.9 °C. Therefore, the sea is pleasantly warm and allows long swims.


February is generally a very hot, muggy month. The average temperature is of 27.8 °C, with a minimum of 24 °C and a maximum of 31.5 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 22.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 34.5 °C.
Rain iconPrecipitation amounts to 334.3 mm, distributed over 17 days.
The day lasts on average 12 hours and 30 minutes.
Sun iconThere are on average 6 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of 7.1 kph.
Sea iconThe average sea temperature is of 29 °C. Therefore, the sea is pleasantly warm and allows long swims.


March, the hottest month of the year, is generally a very hot, muggy month. The average temperature is of 28 °C, with a minimum of 24.1 °C and a maximum of 31.9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 20.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 34.5 °C.
Rain iconPrecipitation amounts to 280.9 mm, distributed over 16 days.
The day lasts on average 12 hours and 5 minutes.
Sun iconThere are on average 7 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of 6.4 kph.
Sea iconThe average sea temperature is of 29.2 °C. Therefore, the sea is pleasantly warm and allows long swims.


April is generally a very hot, muggy month. The average temperature is of 28 °C, with a minimum of 23.7 °C and a maximum of 32.2 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 21.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 34.5 °C.
Rain iconPrecipitation amounts to 106.2 mm, distributed over 9 days.
The day lasts on average 11 hours and 50 minutes.
Sun iconThere are on average 8 hours of sunshine per day. So, the sun shines 69% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of 6.5 kph.
Sea iconThe average sea temperature is of 29.1 °C. Therefore, the sea is pleasantly warm and allows long swims.


May is generally a warm to hot, muggy month. The average temperature is of 26.8 °C, with a minimum of 22.3 °C and a maximum of 31.4 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 18 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 34.5 °C.
Rain iconPrecipitation amounts to 34.8 mm, distributed over 5 days.
The day lasts on average 11 hours and 30 minutes.
Sun iconThere are on average 9 hours of sunshine per day. So, the sun shines 76% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of 5.7 kph.
Sea iconThe average sea temperature is of 28.5 °C. Therefore, the sea is pleasantly warm and allows long swims.


June is generally a warm to hot month. The average temperature is of 25.4 °C, with a minimum of 20.6 °C and a maximum of 30.2 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 17 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 33 °C.
Rain iconPrecipitation amounts to 29.3 mm, distributed over 4 days.
The day lasts on average 11 hours and 25 minutes.
Sun iconThere are on average 8.5 hours of sunshine per day. So, the sun shines 73% of the time.
The average humidity is 70%.
The average wind speed is of 6.9 kph.
Sea iconThe average sea temperature is of 27.2 °C. Therefore, the sea is pleasantly warm and allows long swims.


July, the coolest month of the year, is generally a warm to hot month. The average temperature is of 24.6 °C, with a minimum of 19.5 °C and a maximum of 29.7 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 16.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 33 °C.
Rain iconPrecipitation amounts to 21.2 mm, distributed over 3 days.
The day lasts on average 11 hours and 25 minutes.
Sun iconThere are on average 8.5 hours of sunshine per day. So, the sun shines 75% of the time.
The average humidity is 67%.
The average wind speed is of 6.9 kph.
Sea iconThe average sea temperature is of 26.1 °C. Therefore, the sea is warm enough for swimming.


August is generally a warm to hot month. The average temperature is of 24.8 °C, with a minimum of 19.5 °C and a maximum of 30 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 16.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 33 °C.
Rain iconPrecipitation amounts to 26.7 mm, distributed over 4 days.
The day lasts on average 11 hours and 40 minutes.
Sun iconThere are on average 9 hours of sunshine per day. So, the sun shines 79% of the time.
The average humidity is 64%.
The average wind speed is of 7.8 kph.
Sea iconThe average sea temperature is of 25.6 °C. Therefore, the sea is warm enough for swimming.


September is generally a warm to hot month. The average temperature is of 25.6 °C, with a minimum of 20.5 °C and a maximum of 30.6 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 17.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 33.5 °C.
Rain iconPrecipitation amounts to 35 mm, distributed over 4 days.
The day lasts on average 12 hours and 0 minutes.
Sun iconThere are on average 9.5 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 62%.
The average wind speed is of 8.4 kph.
Sea iconThe average sea temperature is of 25.8 °C. Therefore, the sea is warm enough for swimming.


October is generally a warm to hot month. The average temperature is of 27 °C, with a minimum of 22.3 °C and a maximum of 31.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 19 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 35 °C.
Rain iconPrecipitation amounts to 29.8 mm, distributed over 4 days.
The day lasts on average 12 hours and 25 minutes.
Sun iconThere are on average 9 hours of sunshine per day. So, the sun shines 73% of the time.
The average humidity is 61%.
The average wind speed is of 9.1 kph.
Sea iconThe average sea temperature is of 26.5 °C. Therefore, the sea is pleasantly warm and allows long swims.


November is generally a very hot month. The average temperature is of 27.6 °C, with a minimum of 23.4 °C and a maximum of 31.9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 20.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 35 °C.
Rain iconPrecipitation amounts to 135 mm, distributed over 10 days.
The day lasts on average 12 hours and 40 minutes.
Sun iconThere are on average 8.5 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 66%.
The average wind speed is of 8.2 kph.
Sea iconThe average sea temperature is of 27.6 °C. Therefore, the sea is pleasantly warm and allows long swims.


December is generally a very hot, muggy month. The average temperature is of 27.8 °C, with a minimum of 23.9 °C and a maximum of 31.6 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 21 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 34 °C.
Rain iconPrecipitation amounts to 302.1 mm, distributed over 16 days.
The day lasts on average 12 hours and 55 minutes.
Sun iconThere are on average 7 hours of sunshine per day. So, the sun shines 55% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of 7.2 kph.
Sea iconThe average sea temperature is of 28.5 °C. Therefore, the sea is pleasantly warm and allows long swims.

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