Tanzania Zanzibar Weather in September — Climate Guide
September in Zanzibar is high
Zanzibar Weather in September — Quick Answer
As of 2026- Avg temp
- 30° / 22°
- Rainfall
- 45mm · 4 days
- Crowds
- Busy
As of 2026, Zanzibar in September averages a high of 30°C and low of 22°C with 45mm of rain over about 4 days. Dry season continues — around 30°C/22°C, sunny, warming slightly. Light clothing, SPF 50+, hat. Modest cover for Stone Town. Comfortable with steady breezes.
September is high for Zanzibar.
September stays firmly in the long dry season — sunny, dry, and comfortable at around 30°C, with conditions still excellent but crowds easing after the August peak.
This makes it a sweet-spot month: dry-season reliability with thinner crowds and shoulder prices returning. The north swims well, the east coast still has good wind, Mnemba snorkeling is dependable, and Stone Town is pleasant.
Travel score
Zanzibar September Weather Stats
Avg High
30°C
Avg Low
22°C
Rainy Days
4
45mm total
Sunshine
8.5h
Daily avg
Humidity
78%
comfortable
UV Index
12
Extreme
Wind
12 km/h
Gusts 24
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
9 μg/m³
PM10
20 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
33°C
Nighttime
23°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 24 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Dry-season reliability with fewer crowds
- Shoulder pricing returns
- Reliable snorkeling and beach weather
- Strong mainland safari-combo season
Cons
- Extreme UV (index 12)
- Basic malaria precautions still needed
- Popular restaurants still need booking
- Warming slightly toward October
September Events & Festivals
- Dry season continues — excellent conditions
- Crowds ease after the August peak
- Shoulder pricing returns
- Reliable snorkeling and beach weather
Zanzibar in September — Full Picture
September stays firmly in the long dry season — sunny, dry, and comfortable at around 30°C, with conditions still excellent but crowds easing after the August peak.
This makes it a sweet-spot month: dry-season reliability with thinner crowds and shoulder prices returning. The north swims well, the east coast still has good wind, Mnemba snorkeling is dependable, and Stone Town is pleasant.
It's a strong month for the Zanzibar-plus-safari combo, with the mainland still in prime game-viewing season. Booking is easier than July-August, though weekends and popular restaurants still warrant reserving ahead.
Note: dry conditions keep mosquito numbers lower, but maintain basic malaria precautions. The equatorial UV stays extreme — keep sun protection up.
What to Wear & What to Pack
Dry season continues — around 30°C/22°C, sunny, warming slightly. Light clothing, SPF 50+, hat. Modest cover for Stone Town. Comfortable with steady breezes.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
31.3°C
23.7°C
13.7/mo
Summer (Jun·Jul·Aug)
29.3°C
22°C
4.3/mo
Autumn (Sep·Oct·Nov)
Current30.7°C
22.7°C
7.3/mo
Winter (Dec·Jan·Feb)
32.7°C
24°C
7/mo
Zanzibar Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 33° | 24° | 7d·60mm | 8h | 80% | 12 | Busy | Peak | |
| February (Best) | 33° | 24° | 6d·55mm | 8.5h | 80% | 12 | Busy | Peak |
| 32° | 24° | 11d·130mm | 7h | 83% | 12 | Moderate | Shoulder | |
| 31° | 24° | 16d·290mm | 5.5h | 85% | 11 | Quiet | Low season | |
| 31° | 23° | 14d·200mm | 6h | 84% | 11 | Quiet | Low season | |
| June (Best) | 30° | 22° | 5d·50mm | 8h | 78% | 11 | Moderate | Shoulder |
| July (Best) | 29° | 22° | 4d·45mm | 8h | 77% | 11 | Very busy | Peak |
| August (Best) | 29° | 22° | 4d·45mm | 8.5h | 77% | 12 | Very busy | Peak |
| September (Best) | 30° | 22° | 4d·45mm | 8.5h | 78% | 12 | Busy | Shoulder |
| 31° | 23° | 7d·75mm | 8h | 79% | 12 | Moderate | Shoulder | |
| 31° | 23° | 11d·130mm | 6.5h | 81% | 11 | Moderate | Shoulder | |
| 32° | 24° | 8d·90mm | 7.5h | 81% | 12 | Very busy | Peak |
View Other Months
Zanzibar September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Zanzibar?
Zanzibar in September is high. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Zanzibar in September?
Zanzibar September averages a high of 30°C and a low of 22°C.
Does it rain much in Zanzibar in September?
Zanzibar September averages 45mm of rainfall over about 4 rainy days.
What should I wear in Zanzibar in September?
Dry season continues — around 30°C/22°C, sunny, warming slightly. Light clothing, SPF 50+, hat. Modest cover for Stone Town. Comfortable with steady breezes.
What time are sunrise and sunset in Zanzibar in September?
Zanzibar September sunrise is 06:20 and sunset is 18:20, with 12h 00min of daylight.
What's the air quality like in Zanzibar in September?
Zanzibar September air quality (AQI) averages 28, rated Good. PM2.5 averages 9μg/m³.
What activities are recommended in Zanzibar in September?
In September, Zanzibar is great for Mnemba Atoll snorkeling, North-coast beach days, Stone Town + spice tour.
Is September peak season in Zanzibar?
Zanzibar September crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Zanzibar
View Other Months
Planning a September trip to Zanzibar?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.