Direct answer: the best time to visit Zanzibar is June to October — dry, warm (mid-to-upper 20s °C), and breezy — or December to February, which is hotter but reliably sunny. The window to avoid is mid-March to May: the long rains, when it pours most days and many hotels close.

Zanzibar sits just south of the equator, so there's no winter and no summer — only wet and dry. Two rainy seasons split the year into two sunny windows, and once you see that pattern, planning gets easy.

The two windows worth booking

June – October: the cool dry season

The kaskazi winds have flipped to the cooler kusi. Days sit around 26–29°C, humidity drops, evenings are pleasant, and rain is rare. This is peak season for a reason — it also lines up with the Serengeti's dry season, which makes it the natural window for a safari + beach combo. Book hotels early; the good ones fill months out, especially July–August.

December – February: the hot bright season

Hotter (30–33°C) and more humid, but the light is spectacular and rain is unusual. The short rains of November have just finished, so the island is green. Christmas and New Year are the most expensive two weeks of the calendar; January after the holidays is one of my favourite value windows — same weather, calmer prices.

The window I'll honestly steer you away from

Mid-March to May is the masika — the long rains. This isn't "pack an umbrella" rain; it's proper tropical downpours most days, rough seas that cancel boat trips, and a good number of hotels closing entirely for maintenance. Deals exist, and if you catch a lucky week it can be lovely — but I don't book beach holidays I wouldn't take myself. If those are your only possible dates, tell me and we'll talk honestly about the odds.

The shoulder months worth gambling on

  • November: the short rains — brief, usually afternoon showers between sunny spells. Fewer visitors, softer prices. A good gamble.
  • Early March: often still fine, but you're playing chicken with the masika. I'd book flexible rates.
  • Early June: the rains taper fast; by mid-June you're in the clear at shoulder prices.

Timing by what you're coming for

  • Honeymoon: June–October for comfort, or January for value with the same sunshine.
  • Kitesurfing (Paje): the two wind seasons — roughly December–February (kaskazi) and June–September (kusi).
  • Diving and snorkelling: good most of the dry months; many divers rate February–March and September–October for visibility and calm seas.
  • After a safari or a Kilimanjaro climb: whenever your mainland dates land — just avoid building the whole trip inside April–May.

Tell me your dates on WhatsApp and I'll tell you plainly what that month is like — and which coast of the island suits it best. The advice is free, and booking through me costs the same as booking direct.