Zanzibar: when to go, climate and regions

Zanzibar is a semi-autonomous Tanzanian archipelago in the Indian Ocean, 35 kilometres off the African mainland. The main island combines Swahili-Arab heritage in the UNESCO Stone Town, spice plantations from its 19th-century clove-trade past, and beaches on the east and north coasts that compete with the best in the Indian Ocean. The climate is equatorial — warm year-round with two rainy seasons either side of the dry months.

Best time to visit

June through October is the long dry season — warm, sunny, low humidity, and the most reliable beach weather. December to February is the short dry season between the rains. The long rains (March-May) are best avoided.

Season by season

Winter

December through February is warm (30-31°C), sunny, with the sea at 28°C. This is peak European and South African holiday season — book accommodation months ahead. Brief afternoon showers possible (the 'short rains') but mostly clear skies.

Spring

March, April and May are the long rainy season — heavy daily rain, high humidity, and many beach hotels closing for maintenance. Most travellers avoid this period. Spice tours and Stone Town remain enjoyable.

Summer

June through August is the heart of the dry season — 28-29°C, low humidity, steady trade winds, and excellent visibility for diving at Mnemba Atoll. This is the most reliable single window of the year and a popular time for European summer-holiday extensions to safari trips.

Autumn

September and October continue the dry, warm pattern. November sees the short rains arrive with brief afternoon downpours but mostly sunny days. Whale-shark season runs October to February off Mafia Island, two hours south of Zanzibar.

Regions

• Stone Town. UNESCO old city — winding alleys, carved doors, the spice market, the slave-trade memorial, and rooftop sundowners overlooking the dhow harbour.
• North coast (Nungwi & Kendwa). The most reliable swimming beaches — water at all tides, livelier scene, more bars and restaurants than the east.
• East coast (Paje, Jambiani, Pingwe). Long white-sand beaches, kite-surf central at Paje, and a quieter atmosphere. Tides are dramatic — the sea retreats hundreds of metres at low tide.
• Mnemba Atoll. Day-trip snorkelling and diving off the northeast — clear water, reef sharks, dolphins, and turtles.

Practical tips

• If swimming matters, book the north coast — the east coast has spectacular beaches but a tide that prevents swimming for hours each day.
• Spend at least one night in Stone Town before going to a beach — the contrast is the point of Zanzibar.
• Dress modestly in Stone Town and outside resort beaches — Zanzibar is conservatively Muslim. Bikinis are fine on resort beaches.
• Take a sunset dhow cruise from Stone Town — the most photographed activity for good reason.
• Combine with a Tanzanian safari (Selous, Ruaha or northern circuit) for a classic 'safari and beach' two-week trip.

Frequently asked questions

Why are the tides so extreme on the east coast?

The Indian Ocean reef structure off eastern Zanzibar creates a vast intertidal zone — at low tide the water can retreat 500-1000 metres. This is unique to that coast; the north and west coasts have normal tides and continuous swimming.

Is Zanzibar safe for women travellers?

Generally yes, including solo. Standard travel precautions apply. Modest dress in Stone Town and rural areas reduces unwanted attention. Resort beaches operate by Western beach norms.

Should I take antimalarials?

Yes — Zanzibar is in a malaria zone year-round, with risk highest after rains. Consult a travel clinic four weeks before travel. Bring DEET-based insect repellent for evenings.

What is the food like?

Swahili-Arab fusion — lots of seafood, coconut, spices (especially clove and cardamom from local plantations), pilau rice, and biryanis. The Forodhani Gardens night market in Stone Town is the famous tourist food experience.