Zanzibar sits close enough to the equator that temperatures barely move throughout the year — the real question isn't how hot it'll be, it's how much rain you're willing to plan around, and how much you mind paying peak-season prices.
The short answer
June through October is Zanzibar's main dry season and the safest bet for a first trip — sunny days, little rain, and it lines up with the best part of the Great Migration if you're combining Zanzibar with a mainland safari. December through February is a second, shorter dry stretch that's hot and mostly clear, popular for a winter escape.
Season by season
| Period | Conditions | Worth knowing |
|---|---|---|
| Jun – Oct | Dry, sunny, comfortable heat | Peak season — book beach accommodation early |
| Nov – early Dec | Short rains — brief, usually passing showers | Fewer crowds, lower prices, still plenty of sun |
| Mid Dec – Feb | Hot and mostly dry | Second peak season, especially around the holidays |
| Mar – May | Long rains — heavier, more persistent | Cheapest time to visit, but pack flexibility into your plans |
If you're chasing lower prices
The long rains (March to May) bring Zanzibar's steepest discounts on accommodation, but heavier downpours can disrupt a day's plans, particularly on Pemba Island. If budget matters more than guaranteed sun, this window — or the shorter, gentler rains in November — is worth considering.
If you're combining Zanzibar with a mainland safari
June through October is the strongest overlap with the dramatic river-crossing stage of the Great Migration in the Serengeti, which is a big part of why this window is Zanzibar's busiest and most expensive.