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As on the Tanzanian mainland, January typically marks the start of the short dry season in Zanzibar. Conditions are likely to be hot and mostly dry, with temperatures exceeding 30ºC, although it is not uncommon to get a tropical shower in the afternoons. January can feel very humid at times, and this is particularly noticeable in Stone Town, although this can be tempered by the cooling sea breeze.

New Year is one of the most popular times to visit Zanzibar, with many hotels being fully booked over the festive period. The island generally becomes much quieter after 10th January, and prices drop too.

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The weather in February is fairly similar to January, with days typically being hot and sunny although expect the occasional rainy spell. The humidity remains high, however the coastal areas often have a refreshing breeze. Zanzibar is fairly quiet in February, and with comparatively low prices it can be excellent value for money.

At this time the wind blows from the northeast, and so the southwest coast is often more sheltered and there can be good diving in the Menai Bay. The northeast winds can also lead to good conditions for kite surfing, with many kite surfers heading to the southeast coast and Michamvi Peninsula. For music lovers, Stone Town hosts an annual African music festival ‘Sauti za Busara’ each February. The festival's dates change each year; ask us for details.

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March sees the start of the ‘long rains’ in Zanzibar, although the exact start date varies every year. The weather can be unpredictable, with a combination of hot sunny days, rain showers, and the occasional tropical storm. The arrival of the rains lowers the humidity, and it can also lead to some beautiful sunsets – most obviously on the west coast where you can watch the sunset over the ocean. Prices remain low during March, and the island is likely to be relatively quiet.

Diving is generally not recommended during the rainy season, as variable conditions can lead to reduced visibility from rainfall runoff, and choppy water.

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April is typically the wettest month of the year in Zanzibar, and the long rains are in full force. The average rainfall is more than 250mm during this month, and tropical storms are common. Flooding regularly occurs, which can impact the quality of the roads, and consequently cause difficult, slow journeys across the island. Many of the hotels and beach lodges close at this time, so accommodation options can be limited. Having said this, prices are at their lowest, and if you don’t mind the risk of bad weather you can get some real bargains.

Despite the poor conditions, Easter weekend is often popular, and advance booking is recommended. Due to the strong likelihood of rain and poor conditions diving is inadvisable at this time.

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The long rains continue into May, and as with April you can expect thunderstorms and heavy showers, although these typically ease up towards the end of the month. Parts of the island can experience flooding, causing damage to roads and impacting travel times. The temperature typically drops a little in May, with a daytime average of around 25ºC. The rains lead to a lower humidity too, and mornings and evenings can feel a bit cooler.

Many of the hotels and lodges are still closed, however a handful stay open and prices remain low. While diving is possible, the rain and storms mean that diving conditions are not at their best.

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June marks the start of the long dry season in Zanzibar. While the island still gets rainfall, especially early in the month, it’s becomes less likely as the month progresses. Temperatures remain steady, with daytime highs averaging 25ºC, and it likely to be mostly dry. Any rain you do experience is likely to be in shorter bursts rather than heavy storms and hours of continuous rain, although conditions vary from year to year.

The wind direction switches to blow from the southeast, and the northeast coast is likely to be more sheltered at this time. Diving conditions can be variable, and while they are generally good there can be some rough days.

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July is a very popular time to go to Zanzibar, and this coincides with the long dry season. July and August are the school holidays throughout much of Europe, and Zanzibar can often be busy with families. Weather conditions are generally hot and dry and pretty ideal for a beach holiday, however there is still a chance of an occasional short shower. Conditions for diving are typically pretty good, however this will be dependent on recent weather conditions.

The Zanzibar International Film Festival takes place in July, with lots of people flocking to Stone Town to soak up the atmosphere. The dates for the festival change every year, so chat to Expert Africa for details.

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August is one of the most popular times of year to visit Zanzibar, and with good reason; this is one of the driest months and it is typically hot with clear skies – ideal for relaxing on the beach. Many families choose to visit during August, and the island can be busy, and this is particularly noticeable in Stone Town and around the more popular snorkelling sites.

High demand can mean that many of the more popular hotels and beach lodges can be booked up more than 6 months ahead, so advance booking is crucial. Due to the popularity and great beach weather prices are high.

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September is an excellent time of year to visit Zanzibar. Weather conditions are typically very good, with clear skies and temperatures ranging from 20¬–30ºC. September is also one of the driest months, averaging 50mm of rain during the month, however rain showers are still possible. Due to the great beach conditions prices remain high, however with fewer families travelling in September the island can be a little quieter at this time.

September to December are often some of the calmest months at sea, which can result in superb conditions for diving. The wind typically blows from the southeast, and the northeast coast can often be a little more sheltered. You can find some beautiful snorkelling and diving spots around Mnemba Island.

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October is the tail end of the dry season and you can generally expect hot, dry conditions. The short rains typically start in early November, and so this does mean that there is an increased likelihood of rainy spells as the month progresses. October remains a popular month to travel, particularly so during the European half-term school holidays, and advance booking is advised.

With high demand and great weather prices remain high, however there are some long-stay special offers to be found. South-easterly winds mean that the northeast coast can be more sheltered and conditions for diving can be good.

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The short rains start during November, however their exact start varies year on year. You are likely to experience a mixture of hot, dry days with the occasional tropical shower, however we find that short showers can actually be quite refreshing. With the start of the rains the humidity can shoot up and while the coastal properties tend to receive a pleasant cooling breeze Stone Town and the island interior can feel quite hot and clammy.

Prices drop in November and there are some real bargains to be found. This time of year can be great value for money, especially near the start of the month when the weather conditions are very comparable to late October. The demand is generally lower, and the island starts to feel much quieter.

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December falls in to the short rainy season, and the weather can be variable. Days are likely to be hot and humid, with the occasional patch of rain, although showers can be a blessing in disguise as they help to lower the temperature. Early December is fairly quiet and prices are low, however this changes dramatically over Christmas and New Year.

The festive season, from around 20th December to 5th January, is arguably the most popular time to visit Zanzibar. Prices are at their highest, and long minimum stays are imposed. Due to the very high demand booking early is essential, especially if you’re a group or a large family. Book six months to a year in advance, or even more, if possible.

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