The Short Answer
Zanzibar has two distinct dry seasons — the long dry (Kaskazi, June–October) and short dry (December–February) — separated by long rains (March–May) worth actively avoiding. Since October 2024, all non-resident visitors must carry mandatory Inbound Travel Insurance from the Zanzibar Insurance Corporation, a requirement many pre-2024 guides don't mention. Diving visibility peaks September–March at up to 30 meters, and Paje's kitesurfing runs two separate wind seasons that don't overlap with each other or with the rains.
Two dry seasons, one to avoid
Zanzibar’s climate splits into three windows, and knowing which one you’re booking into changes what the trip actually delivers:
| Season | Months | What it’s good for |
|---|---|---|
| Long dry (Kaskazi) | June–October | The primary window — clear skies, 26–30°C, low humidity, best all-round conditions; coincides with mainland Tanzania’s migration season |
| Short dry | December–February | Secondary good window — hot, sunny, strong diving and snorkelling conditions, especially the south coast in Feb–March |
| Long rains (Masika) | March–May | Actively avoid for a beach-first trip — heavy rainfall, rougher seas, reduced marine visibility, though diving visibility can occasionally be excellent as winds subside |
If your itinerary is flexible, June–October is the safer default; if you’re specifically chasing marine wildlife, check the relevant species guide, since whale sharks, humpbacks, and turtle nesting each run their own separate calendar (see the migration calendar for the full cross-species picture).
The travel insurance requirement most guides miss
Since October 1, 2024, every non-resident visitor to Zanzibar must carry mandatory Inbound Travel Insurance from the Zanzibar Insurance Corporation (ZIC), covering stays up to 92 days at a cost of USD 44. This is a genuinely recent rule change, and plenty of older travel content simply doesn’t mention it. Other international travel insurance policies — even comprehensive ones — are not accepted as a substitute. If you already have travel insurance from home, budget for the ZIC policy as an additional, non-optional cost, not a redundant one.
Diving and kitesurfing: two different calendars
Diving is close to a year-round activity given consistently warm water (25–29°C), but visibility and sea state shift by month — September through March offers the calmest seas and the best visibility, reaching up to 30 meters at its peak.
Kitesurfing runs on an entirely separate schedule from diving, centered on Paje Beach: Kaskazi season (mid-December to February/March) brings north winds averaging 15–18 knots, while Kuzi season (roughly May to September/October) brings generally stronger south-to-southeast winds averaging 15–25 knots. March, April, May, October, and November are the off-season for kiting specifically — note this only partially overlaps with the “avoid” window for general beach travel (March–May), since Kuzi season extends the kiting-good months later into the year than the general dry-season calendar suggests.
Entry requirements and health
Zanzibar is part of Tanzania, so Tanzania’s visa system applies. EU and UK passport holders can typically get a single-entry e-visa or visa on arrival for around $50, valid 90 days. US citizens must apply for a $100 multiple-entry visa valid for 12 months — there’s no single-entry option, and the U.S. Embassy strongly recommends securing it in advance rather than on arrival.
A yellow fever certificate is mandatory if you’re arriving from or transiting more than 12 hours through a risk country. Malaria is present across Zanzibar, and — importantly — chloroquine is not an effective prophylaxis here due to drug resistance; atovaquone-proguanil, doxycycline, mefloquine, or tafenoquine are the recommended alternatives. Hepatitis A/B, typhoid, and routine vaccinations are commonly recommended for Tanzania travel more broadly.
Getting there and around
There are no direct flights from the UK or most of continental Europe. Expect a connection through a Middle East hub (Doha, Dubai, Istanbul) or an East African hub (Nairobi, Addis Ababa, Dar es Salaam) — though some European carriers (Condor, Turkish Airlines, KLM, Air France, Edelweiss) run direct or seasonal routes depending on your departure city. From Abeid Amani Karume International Airport (ZNZ), Stone Town is a short 8–15 minute taxi ride costing $5–15; the east coast beach areas (Paje, Jambiani) run roughly 1–1.5 hours by road.
What this means for planning your trip
Book around June–October by default unless you have a specific reason not to, budget for the ZIC insurance policy as a real line item rather than an afterthought, and check the kitesurfing and diving calendars separately if either is a priority — they don’t move in lockstep with each other or with the general “best season” advice. If marine wildlife is the point of the trip, use our dedicated guides for dolphins and sea turtles rather than treating this page as the final word on timing for those specific encounters.
Frequently Asked Questions
What's the best time to visit Zanzibar?
June through October (long dry season, Kaskazi) is the most commonly recommended window — clear skies, 26–30°C, low humidity, and it coincides with mainland Tanzania's Great Migration if you're combining both. December through February (short dry season) is the secondary window, also good for beaches and diving. March through May (long rains) is worth avoiding — rough seas and reduced marine visibility.
Do I need travel insurance to visit Zanzibar?
Yes, and this is a recent change worth knowing: since October 1, 2024, all non-resident visitors must carry mandatory Inbound Travel Insurance from the Zanzibar Insurance Corporation (ZIC), costing USD 44 for stays up to 92 days. Other international travel insurance policies are not accepted as substitutes — you must purchase the ZIC policy specifically.
What visa do I need for Zanzibar?
Zanzibar is part of Tanzania, so Tanzania's visa rules apply. EU and UK citizens can typically get a single-entry e-visa or visa on arrival for around $50 (90 days). US citizens must apply for a $100 multiple-entry visa valid 12 months (no single-entry option), and the U.S. Embassy strongly recommends securing it before arrival rather than on landing.
When is the best diving visibility in Zanzibar?
September through March offers the calmest seas and best visibility, reaching up to 30 meters at peak. Diving itself is essentially year-round given consistently warm water (25–29°C), but visibility and sea state vary meaningfully by month — plan dive-focused trips around the September–March window specifically.
When can you kitesurf in Zanzibar?
Paje Beach has two separate kite seasons: Kaskazi (mid-December to February/March, north winds averaging 15–18 knots) and Kuzi (roughly May to September/October, south-to-southeast winds averaging 15–25 knots — generally the stronger of the two). March, April, May, October, and November are the off-season, with lower and less reliable wind.
What health precautions does Zanzibar require?
A yellow fever certificate is mandatory if arriving from or transiting over 12 hours through a risk country. Malaria is present island-wide and prophylaxis is recommended — chloroquine is not effective here due to resistance; atovaquone-proguanil, doxycycline, mefloquine, or tafenoquine are the recommended alternatives. Hepatitis A/B, typhoid, and routine vaccinations are also commonly recommended for Tanzania travel generally.
How do I get to Zanzibar, and how do I get around once there?
There are no direct flights from the UK or most of Europe — you'll connect through a Middle East hub (Doha, Dubai, Istanbul) or an East African hub (Nairobi, Addis Ababa, Dar es Salaam). Some European carriers do run direct or seasonal service (Condor, Turkish Airlines, KLM, Air France, Edelweiss). From Abeid Amani Karume International Airport (ZNZ), Stone Town is an 8–15 minute taxi ride ($5–15); east coast beaches (Paje, Jambiani) are roughly 1–1.5 hours by road.