Climate Insights for Antsiranana

The climate in Antsiranana is warm and mild. The average annual temperature is 25°C and approximately 1154mm of precipitation falls per year. January is the wettest month, receiving around 331mm of rainfall. Antsiranana is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: December, February, November. The coldest months are August, July, September, when temperatures can drop to 20°C.

Antsiranana has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is December, when average highs reach 30°C and the mean temperature sits around 26°C. August is the coolest month, with minimum temperatures around 20°C and an average of 23°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.

Antsiranana is a moderately rainy area, receiving approximately 1154mm of precipitation annually, which averages out to around 96mm per month. The wettest month is January, averaging 331mm of rainfall. March and February also tend to see above-average precipitation. The driest month is August, with just 7mm. That's 323mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Antsiranana is moderately windy, with an average annual wind speed of 23km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 29km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in February, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 15km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 28km/h in winter, 26km/h in spring, 16km/h in summer, 21km/h in autumn.

It is currently autumn in Antsiranana, which began on March 20, 2026. Antsiranana is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in December at around 30°C, while the coldest stretch bottoms out in August near 20°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Antsiranana is during June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 10mm per month. By contrast, December can be uncomfortably hot with temperatures reaching 30°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Antsiranana based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.