SeasonMapAntsiranana weather in September
Madagascar
September in Antsiranana: warm, dry, with clean air — an excellent time to visit.
#3 of 12 months in Antsiranana · #75 of 1383 destinations to visit in September · comfort 93/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Antsiranana in September
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Antsiranana climate normals — September
| Daytime high | 27°C / 81°F | 🌤 warm |
|---|---|---|
| Nighttime low | 22°C / 71°F | |
| Sea temperature | 27°C / 80°F | 😎 warm sea |
| Rainfall | 2 mm / 0.1 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 18°C / 65°F | |
| Sunshine | 11 h/day | |
| Daylight | 12 h | |
| Wind | 30 km/h / 19 mph | |
| Air quality (US AQI) | 25 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Antsiranana 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.
Busyschool holidays in 2 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Antsiranana'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).
Best weatherAntsiranana's weather peaks August–October.
Best weatherFair weatherToughest weather
What's on in Antsiranana in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
The long dry months
1 May – 30 Nov · usuallyDry seasonRain is the exception rather than the rule from May onwards, which is when the tracks up Montagne d'Ambre hold and the boats to the Emerald Sea run most days. It is also when the trade wind is strongest across the bay.
Nearby, and something's on
Within 300 km of Antsiranana — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Antsiranana?
Antsiranana in September — FAQ
- Is September a good time to visit Antsiranana?
- September in Antsiranana: warm, dry, with clean air — an excellent time to visit. It ranks #3 of 12 months for Antsiranana on SeasonMap's comfort score (93/100).
- What is the weather like in Antsiranana in September?
- In September, Antsiranana averages a daily high of 27.3°C and a low of 21.9°C, with about 1.7 mm of rain over roughly 0.8 rainy days.
- What is the air quality in Antsiranana in September?
- Antsiranana has a mean US Air Quality Index of about 25 in September.
Other months in Antsiranana
Compare Antsiranana in September
Warmer or cooler than Antsiranana in September
Similar destinations in Indian Ocean — September
Within 300 km: Nosy Be's Humpback whales around 1 Jul – 30 Sep.