Weather in Zanzibar 🇹🇿
Monthly weather averages & travel planning
May
Avg Temp
28°C
Rain Days
20 days
Sun Hours
10 hrs
Humidity
82%
Africa › 🇹🇿 Tanzania › Zanzibar
Updated: March 2026
Is May a Good Time to Visit Zanzibar?
5/10
Fair
May is a fair time to visit Zanzibar (5/10). With 10 daily sunshine hours and only 20 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 12th sunniest of the year in Zanzibar. Culture-focused travellers and those who prefer lighter crowds will find May a practical choice, with prices running lower than peak January without sacrificing all the good weather. June offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 20 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.
vs April:29°C avg high
Visiting Zanzibar in May means warm daytime temperatures peaking at 28°C. Factor in 20 potential rainy days and 82% average humidity when planning your daily activities.
28°C
82°F
Avg High
24°C
75°F
Avg Low
20 days
150 mm total
Rain Days
10h
per day avg
Sunshine
82%
Humid
Humidity
Temperature in Zanzibar in May
The narrow 4°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. At 82% humidity, the 28°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. UV index averages 4 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Wind averages 18 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 82°F average high, 75°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Zanzibar in May
Morning24°CBefore the day warms up
Afternoon28°CPeak daytime temperature
Evening27°CAfter sunset cools down
Packing for Zanzibar in May means dressing for 28°C days and 24°C evenings. A light cotton tee with a casual overshirt works well at 28°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 24°C, a modest 4°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. With 20 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes. At 82% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Zanzibar sees heavy rain periods where a compact travel umbrella can feel inadequate. A packable waterproof jacket offers better coverage for prolonged downpours and leaves both hands free for maps and cameras.
Events in Zanzibar in May
May has no major festivals or public holidays in Zanzibar, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Zanzibar in May
Based on 28°C average highs and 20 rainy days
- Light layers for morning and evening
- Breathable T-shirts and comfortable trousers
- UV-protective sunglasses
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Zanzibar in May
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 28°C, the temperature is ideal for extended walking without overheating
- Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
- Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
- Day trip to the surrounding countryside or coastFull day (depart by 8am)May is reliably dry enough for rural day trips without weather risk
- Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 20 rain days expected, having a full-day indoor plan is practical insurance
- Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
- Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningMay brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in May, with vendors setting up specifically for warm evenings
Why is Zanzibar warm in May?
In May, Zanzibar sits in the dry season corridor, as the ITCZ shifts away from the region and trade winds bring drier, more stable air. This produces reliably sunny days reaching 28°C, with lower humidity than the wet months. Overnight lows of 24°C offer a pleasant reprieve from the midday heat. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Zanzibar in May
In May, Zanzibar experiences average highs of 28°C (82°F) and lows of 24°C (75°F). Expect around 20 rainy days and 10 hours of sunshine per day, with humidity averaging 82%. The 4°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV exposure is moderate at index 4.
Zanzibar typically sees 20 rainy days in May, with total precipitation of around 150mm. This is a notably wet period. A waterproof jacket or compact umbrella is essential, and it is worth building indoor alternatives into your daily itinerary for the inevitable rainy stretches. For context, the driest month in Zanzibar typically sees 4-6 fewer rain days than May.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Zanzibar in May. Daytime temperatures of 28°C are pleasant, but the evening drop to 24°C means a jacket is essential if you plan to be out after dark. With 20 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
May is a reasonable time to visit Zanzibar. Expect 20 rainy days, so pack a light rain layer for flexibility. Average temperatures of 28°C make outdoor exploration comfortable during the dry periods. With 10 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.
The average high temperature in Zanzibar in May is 28°C (82°F), and the average low is 24°C (75°F). The mean daily temperature is approximately 26°C (79°F). The day-to-night range of 4°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Zanzibar is generally January. January offers the most sunshine at 12 hours per day and only 10 rainy days. Average temperatures reach 30°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around January gives you the best chance of dry, bright weather.
May is shoulder or low season in Zanzibar, meaning fewer tourists and generally lower prices than peak months. With 10 sunshine hours and 20 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In May, Zanzibar suits a range of activities thanks to mild temperatures around 28°C. With frequent rain, indoor activities and covered attractions are a smart choice. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 10 hours of sunshine, parks and waterfront walks are particularly enjoyable.
May ranks 12th sunniest of the year in Zanzibar, with an average 10 daily sunshine hours. The driest months are August, September, and February. February is the hottest month (31°C avg high); June is the coolest (27°C). From here, temperatures fall 1°C into June. Compared to last month (April: 29°C high, 25 rain days), May is cooler and drier. May is one of the least sunny months, but that often means lower prices and fewer fellow tourists.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 30°C | 26°C | 10 | 12h | View |
| February | 31°C | 26°C | 8 | 11h | View |
| March | 30°C | 26°C | 22 | 10h | View |
| April | 29°C | 25°C | 25 | 10h | View |
| May | 28°C | 24°C | 20 | 10h | View |
| June | 27°C | 23°C | 11 | 11h | View |
| July | 27°C | 23°C | 8 | 11h | View |
| August | 28°C | 22°C | 7 | 11h | View |
| September | 29°C | 23°C | 7 | 11h | View |
| October | 29°C | 24°C | 11 | 12h | View |
| November | 29°C | 25°C | 18 | 12h | View |
| December | 30°C | 25°C | 20 | 12h | View |
January
10 rain days, 12h sun
30°26°
February
8 rain days, 11h sun
31°26°
March
22 rain days, 10h sun
30°26°
April
25 rain days, 10h sun
29°25°
May
20 rain days, 10h sun
28°24°
June
11 rain days, 11h sun
27°23°
July
8 rain days, 11h sun
27°23°
August
7 rain days, 11h sun
28°22°
September
7 rain days, 11h sun
29°23°
October
11 rain days, 12h sun
29°24°
November
18 rain days, 12h sun
29°25°
December
20 rain days, 12h sun
30°25°
Other Months in Zanzibar
Plan Your Trip to Zanzibar
Data Sources for Zanzibar
Climate normals represent 30-year averages (1991-2020). Individual years may vary.