Zanzibar weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: January – February, June – October
What is the weather like in Zanzibar in September?
In September, Zanzibar is hot: daytime highs average 29 °C, and even at night it stays warm at around 23 °C. The sea averages 26.1 °C – lovely and warm for swimming. The sun shines for around 9 hours a day. Rain falls on about 6 days, adding up to 20 mm. The air is often humid and muggy. All in all, September is an excellent month for a holiday in Zanzibar.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 93 | 95 | 89 |
| Day | 28° | 29° | 29° |
| Night | 23° | 23° | 24° |
| Sea | 26° | 26° | 27° |
| Sun | 8 h | 9 h | 8 h |
| Rain days | 7 | 6 | 10 |
More details for September
- Daylight
- 12 h 4 min06:17 – 18:20
- UV index
- 13 · extremeclear sky, noon (estimate)
- Muggy days
- 30 daysdew point 18 °C or more
- Wind
- 17 km/haverage daily peak
- Cloud cover
- 37 %on average
- Hot days
- 2 days30 °C or more
- Time zone
- UTC+3Africa/Dar_es_Salaam
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %92 %
- Few rainy daysweight 20 %85 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
Zanzibar in September: quick answers
Is Zanzibar hot in September?
Yes. In September, Zanzibar is hot: daytime highs average 29 °C and nights stay around 23 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Zanzibar in September?
Yes. In September the sea averages 26.1 °C – lovely and warm for swimming.
Does it rain much in Zanzibar in September?
Rain falls on about 6 days, adding up to 20 mm.
Zanzibar month by month
The whole year in ZanzibarAll destinations: Tanzania
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)