Nosy Be
13.31° S, 48.25° E
When to go?
Mean 27 °C, 26 rain days in the month (388 mm).
Against
- Hothighs of 29 °C
- Often rainyrain on 8 days in 10
- Torrential rain15 mm per rain day
Mean 27 °C, 23 rain days in the month (292 mm).
Against
- Hothighs of 30 °C
- Often rainyrain on 8 days in 10
Mean 28 °C, 22 rain days in the month (247 mm).
Good for
- Ideal for the seawater at 30 °C
Against
- Hothighs of 30 °C
- Often rainyrain on 7 days in 10
Mean 28 °C, 16 rain days in the month (102 mm).
Good for
- Ideal for the seawater at 30 °C
Against
- Hothighs of 30 °C
- Often rainyrain on 5 days in 10
Mean 27 °C, 9 rain days in the month (53 mm).
Good for
- Ideal for the seawater at 29 °C
Against
- Hothighs of 29 °C
Mean 25 °C, 6 rain days in the month (33 mm).
Good for
- Ideal for the seawater at 28 °C
Against
- Hothighs of 28 °C
Mean 25 °C, 6 rain days in the month (34 mm).
Good for
- Ideal for the seawater at 27 °C
Against
- Hothighs of 27 °C
Mean 25 °C, 7 rain days in the month (40 mm).
Good for
- Ideal for the seawater at 26 °C
Against
- Hothighs of 27 °C
Mean 25 °C, 9 rain days in the month (43 mm).
Good for
- Ideal for the seawater at 27 °C
Against
- Hothighs of 28 °C
Mean 26 °C, 12 rain days in the month (65 mm).
Good for
- Ideal for the seawater at 27 °C
Against
- Hothighs of 29 °C
Mean 27 °C, 17 rain days in the month (132 mm).
Good for
- Ideal for the seawater at 28 °C
Against
- Hothighs of 30 °C
- Often rainyrain on 6 days in 10
Mean 27 °C, 23 rain days in the month (235 mm).
Good for
- Ideal for the seawater at 29 °C
Against
- Hothighs of 30 °C
- Often rainyrain on 7 days in 10
No ideal month: the best months are June–August, the least hot. Ideal for the sea: March–December. Avoid September–May (hot, at times often rainy and torrential rain).
What is the climate like?
Temperature and rain
Monthly min and max temperature (°C)
Monthly min and max temperature (°C)
How much it rains
Rain days and how much water
Rain days and how much water
Bars: length = rain days, thickness = mm on a rain day, area = the month's rain. 3 mm a day7 mm a day15 mm a day
Colour = the month's rain: 103060100160250400mm
Daylight hours
Daylight and sky: sunrise, sunset and cloud cover
daylight under a clear sky (average share)daylight under cloud
daylight under a clear sky (average share)daylight under cloud
Times on the 15th of each month, in local time: daylight saving where and when it applies, standard time in the other months.
Sea temperature: Mozambique Channel
Monthly mean sea temperature: Mozambique Channel (°C)
Monthly mean sea temperature: Mozambique Channel (°C)
Effect of climate change
Today's climate (1996–2025) compared with 1961–1990:
In short
Year by year
Temperature of each year
Against 1961–1990 the mean temperature of today (1996–2025) has changed by +0.4 °C; in the last ten years by +0.7 °C. Warmest year: 2024 (+1.2 °C), coldest: 1971 (−0.5 °C).
June and August warmed the most (+0.5 and +0.5 °C), July the least (+0.3 °C).
Warming stripes: after an idea by Ed Hawkins (University of Reading), showyourstripes.info, CC BY 4.0.
Rain of each year (% against 1961–1990)
more rain than in 1961–1990less rain
Rain in a year: no clear trend, dry and wet years alternate as before.
The sea, then and now
+0.4 °Cthe sea today, compared with 1961–1990